We purchased three new rose bushes. We already had one in a small garden and every year only one or two roses would come out. But they were beauties. I believe it happened because all the other plants in the garden completely covered the rose bush. So, with the addition of three new bushes, I decided to pull the old one out of the garden and place it with the others. I knew the shock of the transfer would cause it to weaken a bit. It did. In fact, My wife Mary was right. It almost died. One of the tallest branches, the most probable one to produce a rose, slumped(弯垂的). After a few days, the branch nearly touched the ground. "It'll come back!" I said trying to convince Mary. I was right in doing this. After a few days most of the plant seem to respond. But, in general, it looked bad. "Should I cut off that branch?" Mary asked one day. "No, just leave it." I said. After about a week I approached the plant, cutter in hand, and discovered that although still slumped and bent, it had completely recovered. The branch was strong and firm. It regained full strength and abilities to produce a single rose! Like seeing someone with physical challenges you might think they were unable to live life to the fullest. You'd be wrong. They too learned to live within the newly defined life to become all they could be. Strong within the boundaries of their new life, they blossomed to become all they were created to be. (1)The old rose bush produced few roses probably because　 　. A. it was getting old B. the soil there was very poor C. it couldn't get enough sunshine D. the climate there was dry (2)According to the passage, the slump of the old rose bush　 　. A. was beyond the author's expectations B. met the author's expectations C. annoyed the author D. disappointed the author a lot (3)When the author appeared with a cutter in hand in front of the old rose bush about one week later he　 　. A. was happy that it became completely straight B. was sad that it was not used to the new environment C. was shocked that it produced one rose D. was sad that it still slumped (4)What can we learn from the passage?　 　 A. Transferring the rose bush is damaging to its growth B. It is difficult to live in a new environment C. We should be patient while planting flowers D. We should learn to survive the great changes in our life

8分WhetheryouareatapublicrestaurantacoffeeshopwaitinginlineattheairportorbankoraroundthefamilydinnertableyouwillseepeoplefocusedontheirphonesmessageschattingandpostingpicturesofdeliciousfoodonInstagram.IcanrarelyrememberthelasttimeIsawmyteenagerwithoutaphoneinherhandonemomcalledSarahsaid.Shetextssomuchherphoneispracticallyapartofherbody.Somanypeople﹣parentsandkidsalike﹣arefeelingmentallyandphysicallyexhaustedandphone﹣overwhelmed.What'sthesolutiontothisproblem? Makeaplan.Choosespecifictimessay8a.m.12a.m.and4p.m.whenyouintendtocheckintoreadtextssocialmediaupdatesandsoonandthendoyourbesttosticktotheplan.Trynottojustwingit.Createphone﹣routinesthathelpyoutocreatethekindofdayandlifethatyouwant. Savorthesoundofsilence.Ifyourphoneiscontinuallybleepingandpingingeverytimesomethinghappensit'sgoingtobetoughforyoutostayfocusedonwhateveryou'retryingtodo﹣you'llbetemptedtocheckinandseewhat'sup!Turnthevolumeonyourphonedowntozeroorpowerdownyourphonecompletely.Ifyou'reconcernedthatyoumightmisssomethingimportant﹣likeanemergencyphonefromyourparentsoryourboss﹣youcancreateacallfilter过滤器sothatcertainpeople'scallscomethroughevenifyourphoneisonsilent.Thatwayyoucanresteasyknowingthatyouwillnevermisssomethingthatistrulyurgent. Enjoyphone﹣freeadventures.Afewtimesaweektryleavingyourphonesafelyathome.Goforaphone﹣freewalkwithyourdogaphone﹣freedatewithyoursweetheartoraphone﹣freetriptothegrocerystore.Whenwasthelasttimeyoudidthat? Seehowitfeelstomovefreelythroughtheworldwithoutthedigitalcompanionforawhile.Itmustbeavaluableexperiencethatcanhelpyouenjoytherealworld. 1WhathappenedtoSarahandherdaughteraccordingtothetext? A.Sarahfeltexhaustedbecauseshehadsentsomanysawherdaughter'sphone B.Sarahcouldnotrememberthetimewhenshelastsawherdaughter'sphone C.Sarahcouldnotrememberwhereherdaughter'sphonewas D.Sarahthoughtherdaughterhadbeenspendingtoomuchtimeonherphone 2TheunderlinedwordSavorinthethirdparagraphcanbebestreplacedby. A.Stand B.Escape C.Enjoy D.Break 3Fromthepassagewecanlearn. A.manypeoplefeelitdifferenttotearthemselvesawayfromtheirphones B.nocallscangetthroughifyourphoneisonsilent C.youcannevertrygoingwithoutyourphoneinyourleisuretime D.onlybycompletelyturningoffyourphonecanyoufocusonyourwork 4Thearticleisintendedto. A.warnpeopleofthepossibledamagecausedbyusingphonesconstantly B.suggestsometipstocreateabalancedrelationshipwithyourphone C.convincepeopleofthebenefitsofleavingphonesathome D.arguethatusingphonesconstantlywillmakepeopleextremelytired

1分根据句意和所给汉语完成句子.每空一词. Rose'sfatheristhe忙碌的inthehospitalbecauseheisanexcellentdoctor.

放射治疗是一种有效的治疗肿瘤的方法Egr﹣1基因启动子能在电离辐射诱导下启动并诱导其下游基因表达．某科研小组将有抗肿瘤作用的细胞因子IFNγ基因连接到Egr﹣1基因启动子上通过X射线诱导IFNγ基因表达增强以达到杀伤肿瘤细胞的目的．如图表示重组质粒的构建过程请回答下列问题 1启动子位于基因首端是识别和结合的部位．cDNA是以为模板直接合成的． 2利用PCR技术扩增目的基因的原理是据图分析构建重组质粒时需要用切割质粒．与E・coliDNA连接酶相比T4DNA连接酶独特的作用是． 3基因工程是指将自然界中已有的一种生物的基因转移到另一种生物体内使后者可以产生它本不能产生的蛋白质．而被称为第二代基因工程的蛋白质工程是指．

已知函数y＝fx的图象如图所示则fx的解析式可能是

@@.1．2分如图手机与音叉的位置保持不变利用手机软件测出音叉发出的声音从50dB变为30dB．说明音叉发出的声音选填音调响度或音色变小．

1分根据句意和所给汉语完成句子.每空一词. Don'tworry!Weareoldenoughtolookafter我们自己.

如图曲线b表示在最适pH最适温度条件下反应物浓度与酶促反应速率的关系．据图分析下列叙述正确的是

如表是某中学3﹣6月份用电量单位万度的一组数据 由上表可得线性回归方程则m等于

属于氮肥的是

1分﹣Whatdoyouthinkoftheband'sperformance? ﹣Itcouldbe.Ithinkthey'refeelingverynervous. A.good B.better C.bad D.worse

将金属镁和另一种金属X的混合物共ag加入CuNO32FeNO32的混合溶液中充分反应后过滤得到滤液和滤渣．相关分析错误的是

我国科学工作者经过多年努力逐步完善了基因工程生产疫苗的技术．图为通过基因工程生产乙肝疫苗的示意图．回答下列问题 1基因工程中所使用的DNA连接酶有两类即DNA连接酶和DNA连接酶． 2从细胞间的信息交流方面考虑乙肝病毒能专一侵染开细胞的原因是． 3若要在体外获得大量的目的基因常采用技术．若要使目的基因在受体细胞中表达需要通过质粒载体而不能直接将目的基因导入受体细胞原因是． 4若②过程用重组质粒转化大肠杆菌一般情况下不能直接用未处理的大肠杆菌作为受体细胞原因是． 5使用酵母菌作为受体菌生产乙肝疫苗的效果更好从细胞结构的角度分析原因是．

下列人体体液中一定属于碱性的是

核电站是利用核选填聚变或裂变来发电核能是选填可再生或不可再生能源．

设随机变量X的概率分布列如下 则PX＜4＝

下列与细胞代谢有关的叙述正确的是

下列关于真核生物基因表达的叙述正确的是

10分假定英语课上英语老师要求同桌之间互相修改作文请你修改你同桌的以下作文.文中共有10处语言错误每句中最多有两处.错误涉及一个单词的增加删除或修改. 删除把多余的词用斜线\划掉. 增加在缺词处加一个漏字符号∧并在该词下面写出该加的词. 修改在错的词下划一横线在该词下面写出修改后的词. 注意1.每处错误及修改均仅限一词. 2.只允许修改10处多者从11处起不计分. Patienceisgreatimportanceinourdailylife.OnceIwaitedforabustocomeatastop.30minutespastbutnobuscame.BothupsetandannoyedIdecidetowalkonfoot.ButnosoonerhadIleftwhenabusarrived.IthoughtifIhadwaitedforonemoreminutesIwouldhavecaughtit.IfIchosetotakethenextbusIwouldhavetowaitforother30minutes.OnlythendoIrealizemyproblem.Beingimpatientwillpossiblewastealltheeffortthatwehaveputitin.NowwheneverIamclosetolosemypatienceI'llthinkofthisexperience.

15分Bodyimage﹣thewaypeoplefeelabouttheirlooks﹣isabigproblemformanyyoungpeopletoday.Accordingtoa1morethanhalftheteenagegirlsintheUSAthink2shouldbeonadiet节食andalmostoneinfiveteenageboysare3abouttheirbodiesandtheirweight. Butwhat'sthecause?Inthestudymanyblame责备themedia媒体.TurnontheTVandyou'll4seebeautifulmodelshandsomeactorsandfitsportsstars.5amagazineoranewspaperlookthroughtheInternetandit'susually6. Manyyoungpeoplefeelpressureto7theseperfectpeople.Butformostthisisjustnotpossible.IntheUSAtheaverage平均的womanis163cmtallandweighs64kilos8theaveragemodelis180cmtallandweighs53kilos. Whenpeopledon'tlookthewaymany9peoplelooktheymaybecomelessconfident.Somestopeating10inordertoloseweight.Studentscanlosesomuchconfidencethattheystartto11takingpartinclassroomactivitiesatschool. Bodyimageproblemsdon't12aswegetoldereither.IntheUKforexamplewomenover50spendmoremoneyoncosmetics化妆品thananyother13group.Oldermenspendalotofmoneytryingto14hairloss损失. Isthereasolutiontotheproblem?A2016studyintheUKsuggestedthatbodyimagelessonsshouldbeprovidedin15.Othersbelieveit'saproblemthatallofsocietyneedstodealwith.AsMeaghanRamseysaysWeneedtojudge批判peoplebywhattheydonotwhattheylooklike. 1A.newspaper B.magazine C.study D.book 2A.we B.they C.you D.she 3A.confident B.sure C.worried D.happy 4A.probably B.hardly C.never D.finally 5A.Get B.Open C.Take D.Find 6A.thesame B.different C.special D.interesting 7A.lookafter B.lookfor C.lookat D.looklike 8A.because B.although C.but D.of 9A.kind B.strong C.young D.famous 10A.early B.properly C.slowly D.carefully 11A.enjoy B.stop C.finish D.forget 12A.come B.continue C.disappear D.happen 13A.age B.job C.hobby D.man 14A.make B.avoid C.refuse D.protect 15A.supermarkets B.streets C.parks D.schools

在下列四种飞行器中飞行时利用流体压强与流速关系获得升力的是

2C+SiO2Si+2CO↑属于

果蝇是遗传学研究的经典实验材料其三对相对性状中灰身对黑身为显性大翅脉对小翅脉为显性细眼对粗眼为显性这三对相对性状各受一对等位基因控制．回答下列问题 1若只研究灰身和黑身大翅脉和小翅脉这两对相对性状某同学将一只灰身小翅脉雌绳与一只灰身大翅脉雄蝇杂交实验过程无交叉互换现象F1的表现型及比例为灰身大翅脉灰身小翅脉黑身大翅脉黑身小翅脉＝3311．根据上述实验结果填能或不能确定两对基因遵循自由组合定律理由是． 2基因自由组合定律的实质是在过程中同源染色体上的等位基因彼此分离的同时自由组合． 3现有三个纯合果蝇品系可供选择甲灰身大翅脉粗眼乙黑身大翅脉细眼和丙灰身小翅脉细眼假定不发生染色体变异和交叉互换．若控制三对相对性状的三对等位基因都位于常染色体上请以上述三个纯合品系为材料设计实验来确定这三对等位基因是否分别位于三对染色体上．要求写出实验思路预期实验结果得出结论．

30分AsachildIstartedlearningtoplaythepianomyfavoritemusical1butIwasforcedtogiveupwhenIstartedmymiddleschool2Icouldconcentratemoreonmystudies. It'soneofmybiggest3tostoppracticingthepianowhenIrecallsadlytoday.DuringthefollowingyearsIkepttellingmypianoteacherthatIwould4.HoweverIdidn'tkeepmypromisebecauseIwas5withmystudy.6Ilosttouchwithmyteacher.Someyearslatermyteacherdied.IwasverysadbecauseIlostsuchagoodteacher.Shewasaverywarmandgentleperson.Ithurtsmetothinkshemayhavebeen7thatIneverreturned.Ihaven'ttakenlessonssincethenbuttobehonestI8to.SittingatthepianoIcouldn'thelprecallingmany9﹣﹣timesofmypractisingathomeandplayingbeforemyteacherandonetimemyteacher10meafterIplayedentirepiecesofmusicwronginfrontofhercolleagues.Iwasso11thatIcouldhardlysayanything.Buther12helpedmeeasemyshame.Thesememories13goodorbadnevercausedmy14forplayingthepianoagain. Thisthoughtthenledmetothinkthat15islikemusicandthatwealltrytoplaydifferent16intheinstrumentofourlife.Sometimesthepitch音高is17whenweplayitwellbutsometimesweareoutoftone.Howeverweallcontinuetocreateourown18styleofmusic.Nomatterwhatstyleourmusicisitis19thatwesingthesongsofjoyquietnessandlove.ThoughImaynevermakeitbacktopianolessonsitdoesn't20thatI'vestoppedmakingmusic. 1A.instrument B.performance C.room D.stage 2A.because B.sothat C.nowthat D.for 3A.successes B.regrets C.decisions D.hobbies 4A.play B.graduate C.leave D.return 5A.occupied B.angry C.satisfied D.patient 6A.Actually B.Constantly C.Suddenly D.Gradually 7A.astonished B.glad C.disappointed D.amazed 8A.liked B.needed C.wanted D.decided 9A.dreams B.expressions C.words D.memories 10A.instructed B.hurt C.punished D.respected 11A.frightened B.moved C.embarrassed D.excited 12A.happiness B.satisfaction C.comfort D.sigh 13A.instead B.meanwhile C.therefore D.however 14A.hope B.courage C.feeling D.effort 15A.life B.learning C.attitude D.enjoyment 16A.cards B.sports C.roles D.games 17A.hard B.wonderful C.surprising D.complex 18A.unique B.boring C.common D.similar 19A.necessary B.strange C.possible D.important 20A.mater B.mean C.report D.appear

1分Thefilmseemsinterestingweallwanttoseeit. A.and B.but C.unless D.if

人参皂苷与促性腺激素的作用相似当人参皂苷进入人体后

能发生反应且化学方程式书写正确的是

放入水中能够形成溶液的是

已知函数fx＝ax2﹣lnxa∈R． 1讨论函数fx的单调性 2若函数fx有2个不同的零点求实数a的取值范围．

用数学归纳法证明从n＝k到n＝k+1左边应增加的项是

随机变量X～则D2X＝

下列有关实验的叙述正确的是

如图所示的电路中电源电压保持不变闭合开关S将滑动变阻器的滑片P向左移动下列说法中正确的是

如图所示电源两端电压恒定．闭合开关灯泡L1比灯泡L2亮则

6分Meetingpeoplefromanotherculturecanbedifficult.Fromthebeginningpeoplemaysendthewrongsignal.Ortheymaypaynoattentiontosignalsfromanotherpersonwhoistryingtodeveloparelationship. Differentculturesemphasizetheimportanceofrelationshipbuildingtoagreaterorlesserdegree.Forexamplebusinessinsomecountriesisnotpossibleuntilthereisarelationshipoftrust.Evenwithpeopleatworkitisnecessarytospendalotoftimeinsmalltalkusuallyoveraglassofteabeforetheydoanyjob.InmanyEuropeancountries﹣liketheUKorFrance﹣peoplefinditeasiertobuildupalastingworkingrelationshipatrestaurantsorcafé'sratherthanattheoffice. Talkandsilencemayalsobedifferentinsomecultures.IoncemadeaspeechinThailand.Ihadexpectedmyspeechtobeasuccessandstartalivelydiscussion;insteadtherewasanuncomfortablesilence.Thepeoplepresentjuststaredatmeandsmiled. AftergettingtoknowtheirwaysbetterIrealizedthattheythoughtIwastalkingtoomuch.Inmyowncultureweexpressmeaningmainlythroughwordsbutpeopletheresometimesfeeltoomanywordsareunnecessary. EvenwithinNorthernEuropeculturaldifferencescancauseseriousproblems. CertainlyEnglishandGermanculturessharesimilarvalues;howeverGermansprefertogetdowntobusinessmorequickly.Wethinkthattheyarerude.Infactthisisjustbecauseoneculturestartsdiscussionsandmakesdecisionsmorequickly. Peoplefromdifferentpartsoftheworldhavedifferentvaluesandsometimesthesevaluesarequiteagainsteachother.Howeverifwecanunderstandthembetteramulticulturalenvironmentwillofferawonderfulchanceforustolearnfromeachother. 1Insomecountrieseatingtogetheratrestaurantsmaymakeiteasierforpeopleto. A.gettoknoweachother B.sharethesameculture C.developcloserrelations D.keepeachothercompany 2TheauthormentionshisexperienceinThailandtoshowthat. A.theEnglishprefertomakelongspeeches B.eventalkandsilencecanbeculturallydifferent C.peoplefromThailandarequietandshybynature D.toomanywordsareofnouse 3Accordingtothetexthowcanpeoplefromdifferentculturesunderstandeachotherbetter? A.Byrecognizingdifferentvalues. B.Byacceptingdifferenthabits. C.Bysharingdifferentwaysoflife. D.Byspeakingeachother'slanguages.

12.5分＞FROMTHEEDITOR DEAR READERS. Happybirthdaytous!TIMEzine'sfirse期刊cameoutonMarch31923.Sure96isn'tthemostspecialbirthdaycomparingwiththe100thbirthday.Butwetakeeveryopportunity机会tocelebrate.TIMEforKidscamealongjustalittlebitlaterin1995.Soonwewillhaveour25thbirthday！ WehaverunourKidReporterprogramformanyyears.Manykidswhotookpartintheprogramasareporterareprofessionaljournalist职业记者now.WhiletheywereworkingwithTFKtheycaughtsomegreatopportunitieslikeinterviewingpoliticalleadersfamouspeopleOlympicathletesscientistsandmore. Doyoudreamofbeingareporter?Comeandjoinus!OnMarch15wewillholdourannual一年一度的competitiontofindournextgroupofTIMEforKidsReporters.EditorsfromTFKwillchoose10beststudents. Ihopeyouwillhaveachancetoreportforourmagazinesandwebsitesduringthe2019﹣2020schoolyear. Allthebest 1AccordingtothepassageTIMEforKidswillhaveitsbirthday. A.96th B.100th C.23rd D.25th 2WhatwilleditorsfromTFKdointheirannualcompetition? A.Takepartintheprogram. B.Interviewpoliticalleaders. C.Choose10beststudents. D.Reportfortheirmagazines. 3HowlongwillthenextgroupofreportersworkwithTFK? A.Halfayear. B.Oneyear. C.Twoyears. D.Threeyears. 4AndreaDelbancois. A.areader B.aneditor C.areporter D.astudent 5Youcanfindthepassagein. A.awebsite B.abook C.anovel D.adiary

针对新高考改革学校将根据同学们选科情况进行重新分班在分班之前一个小组的6名同学要合影留念其中有2名女生4名男生则这2名女生相邻且男生甲不站在两端的站法有种用数字作答

1分Tomakeriversthanbeforeeverybodyissupposedtoprotectthem. A.dirty B.dirtier C.clean D.cleaner

我国计划在2025年实现首次载人登月．已知月球上无大气无磁场物体在月球上所受重力只相当于地球上的假设月球表面粗糙程度与地面相同．在月球上你认为下列情况可能的是

在等差数列{an}中a4＝7a2+a8＝18则公差d＝．

中国有五千年的茶文化历史研究发现氨基酸总含量高的鲜叶更适合制作优质绿茶．某研究小组对单作间作两种种植方式影响茶叶品质的光合作用生理机制进行如下研究． I．实验分组 甲组单作只种植茶树1米左右 乙组间作桂花树高5～6米含笑树高10～12米分别与茶树间行种植． Ⅱ．实验过程 在同一个茶厂试验地坡势平缓度土壤肥力基本一致分别于春茶夏茶生长季节进行测定．选择天气晴好的日期从800～1800时每隔2h测定一次茶树的相关数据．结果如下所示． 表两种种植条件下不同季节对茶叶氨基酸总量茶多酚的影响 1间作使茶园群落的空间结构变得更加复杂有利于提高作物对资源的利用．茶可以饮用桂花可以入药含笑种子可以榨油这都体现了生物多样性的价值． 2图1中导致800～1200期间甲乙两组净光合速率均增加的环境因素是．图2中与甲组相比乙组在1000～1200期间净光合速率继续增加的原因是． 3两组种植中更适合制作优质绿茶的采摘季节和种植方式是．

如图所示人用绳子拉着木块木块在绳子拉力作用下在水平面上做匀速直线运动则下列说法中正确的是

__提出的一带一路是跨越时空的宏伟构想赋予古丝绸之路崭新的时代内涵把我国的高铁技术火药使用蚕丝制造等送到国外其中属于现代先进科技的是黑火药爆炸时的化学反应方程式为S+2KNO3+3C═X+K2S+3CO2X的化学式为．

冬季为避免__线结冰而导致输电线路损坏电业局频频出招利用无人机装配喷火器喷火通过方式改变内能使冰熔化利用电流的热效应通过选填增大或减小电流使电线温度升高．

15分Honestymymumalwaysusedtotellmeis1bestpolicy.Ofcoursethisdidn'tincludeherwhenshetoldme2ifIdidn'teatallmyvegetablesFatherChristmaswouldfindoutandwouldn'tgiveme3presents. ButwhenitcomestomedicineIhadassumed4wasimportanttoalwaysbehonestwithmy5patient.Afterallthedoctor﹣patientrelationshipisbasedontrustandthereforehonestyisessentialor6Ithought. Ihadjuststartedworkinginhospital.Mr.McMahonwasbroughtinwhenhisbellywasfoundvery7swell.Wellweneedtoproveit'snotcancer.Isaidandtalked8brief. Myconsultantwasobviously9angerwithmeandasweleftMr.McMabonsheturnedtome.Whyonearthdidyoudothat?Andgivehermoretoworryabout?sheaskedindisbelief.Evenifyoususpectitthinkverycarefully10youtellpeople.

2016年8月16日我国用长征二号丁运载火箭成功将世界首颗量子科学实验卫星简称量子卫星墨子号发射升空如图所示火箭在加速上升的过程中

已知等比数列{an}的前n项和其中λ为常数． 1求λ 2设bn＝log2an求数列{an+bn}的前n项和Tn．

化学是一门以实验为基础的科学．请根据下列仪器和实验装置回答问题 1仪器名称①． 2利用图1所给仪器组装一套二氧化碳或氧气的制取装置并写出该反应的化学方程式基本反应类型是． 3若用图2装置收集二氧化碳气体气体应从导管填m或n端通入． 用燃着的木条放在另一端发现小木条始终不熄灭说明该瓶气体没有集满出现上述现象的原因可能是写一个．

在测量小灯泡的电功率的实验中小灯泡的额定电压为2.5V正常发光时的电阻约为8Ω． 1在图甲中有一根导线未连接请用笔画线代替导线将电路连接完整 2闭合开关后小灯泡不亮电流表没有示数电压表有较大的示数经检查导线连接完好则电路故障可能是小灯泡发生了选填短路或断路 3移动滑片P到某一位置时电压表示数如图乙所示为V此时要测量小灯泡的额定功率应将滑片P向选填左或右端移动 4移动滑片P记下多组对应的电压表和电流表的示数并绘制成图丙所示的I﹣U图象由图象可计算出小灯泡的额定功率是W． 5完成上述测量后不用电压表用如图丁所示的电路也可测量已知额定电流的小灯泡的额定功率已知小灯泡的额定电流为I额定值电阻的阻值为R0实验步骤如下请补充完整 ① ②闭合开关SS1断开开关S2记录下此时电流表的示数为I ③小灯泡的额定功率的表达式为P额＝W．

人体中一些体液的pH都处在一定的范围内其中酸性最强的是

下列有关基因突变的叙述正确的是

如图所示磁悬浮地球仪应用了选填同或异名磁极相互排斥的规律．

下列与生物学实验相关的叙述错误的是

熟石灰在生产生活中有着重要的应用．它的溶解度曲线如图所示则以下说法正确的是

无细胞蛋白质合成系统是以外源DNA或mRNA为模板人工添加所需原料和能源物质以细胞提取物为条件合成蛋白质的体外基因表达系统．下列叙述正确的是

8分IrelandJapanChinascientistssharethe2015NobelPrizeformedicine.WilliamCampbellSatoshiOmuraandTuYouyoujointlywontheprizefortheirworkagainstdiseasestheaward﹣givingbodysaidonMonday. TuYouyouascientistattheChinaAcademyofChineseMedicalScienceshasnopostgraduatedegree.Shehasneverstudiedordoneresearchabroad.SheisneitheramemberoftheChineseAcademyofSciencesnortheChineseAcademyofEngineering.Howeverthe81﹣year﹣oldpharmacologisthasbecomethefirstscientistontheChinesemainlandtowinaLaskerAwardthemedicalprizeoftheAlbertandMaryLaskerFoundation. TheLaskerAwardshaveexistedsince1945.Tuwaspresentedthe2011LaskerClinicalMedicalResearchAwardonSeptember23.Shediscoveredadrugcalledartemisinin.Thedrugisnowwidelyusedagainstmalaria. Tuandhercolleaguesjoinedagovernmentprojecttofindanewmalariadruginthelate1960sduringtheculturalrevolution1966﹣76.Theymade380herbalextractsfrom200potentialrecipes.TherecipescamefromtraditionalChinesemedicalbooks.Theteamthentestedthemonmalaria﹣infectedmice.FinallyTubecameinterestedinanextractoftheplantqinghaoorsweetwormwood. AccordingtoanancientChinesemedicinebookqinghaowasonceusedtotreatmalaria.Howevertheextracttheymadeinthelabdidn'tworkwell.MaybethoughtTutheeffectiveingredientinqinghaowasdestroyedbyhightemperatures.ThereforeTutriedtomaketheextractwithanetherwhichhasamuchlowerboilingpointthanwater. In1971aftermorethan190failuresTufinallygotanextractthatwas100percenteffectiveagainstthemalariaparasites.Theextractwascalledqinghaosulaterrenamedartemisinin. AccordingtoastatementontheLaskerFoundationwebsiteduringthepastfourdecadesTu'sdrughassavedmillionsoflives.Itisespeciallyimportantforchildreninthepoorestandleastdevelopedpartsoftheworld.HowevernotmanypeopleknewofthescientistuntilshewontheLaskerAwardthismonth. LaskerAwardsareknownasAmerica'sNobelsforthereasonthatinthelasttwodecades28LaskerPrizewinnershavegoneontoreceivetheNobelPrizeand80since1945accordingtoXinhuaNewsAgency. ThediscoveryofartemisininisagifttomankindfromtraditionalChinesemedicineTusaidwhenshereceivedthea﹣ward.Continuousexplorationanddevelopmentoftraditionalmedicinewillwithoutdoubtbringmoremedicinestotheworld. 1Whatcanweinferfromthesecondparagraph? A.Itisunnecessarytostudyabroadasascientificresearcher. B.ChinesemedicineusednottoberecognizedinWesterncountries. C.Tuachievedgreatthingsalthoughshedidn'thaveanimpressivebackground. D.TuisthefirstfemalescientisttowinaLaskerAward. 2IntheprocessofdiscoveringartemisininTu. A.beganwithaprivateproject B.succeededduringthefirstexperiments C.facedmanydifferentopinions D.madeextractsinacreativeway 3Whyisartemisininespeciallyimportantforchildrenfrompoorcountries? A.Itisaverycheapmedicineandeasyforthemtogetholdof. B.TheybelieveintheeffectofChinesemedicine. C.Therearenoothercuresformalaria. D.Ithasthefewestsideeffectsforchildren. 4AccordingtothearticletheLaskerAwards. A.aremoreinfluentialthanNobelPrizesinthemedicalfield B.areawardedtothosewhohavemadegreatmedicalachievements C.areawardedtomoreAmericansthanpeoplefromanyothercountry D.areusuallyawardedtoscientistswhoarenotfamousintheirfield

通电直导线周围的磁场是以导线为圆心的同心圆如图甲所示判断直导线周围磁场方向的方法是用右手握住直导线让大拇指指向与直导线中电流的方向一致则弯曲的四指所指方向即为磁场方向．请你用此方法判断图乙中直导线通电时小磁针N极指向选填垂直纸面向内或垂直纸面向外．

5分Thereissomethingdifferentinthisweek'sblog.Let'slookatsomebirthdaycustomsaroundtheworld. HarryBakerPerthAustralia It'smybirthdaynextWednesday.I'mgoingtobe10yearsold.1inmycountry.Mymom'sgoingtomakemeahugeplateoffairybread.It'sasnack.WemakeitwithbreadbutterandcolorfulsugarcalledHundredsandthousands. JimDixonMontegoBayJamaica Ilovebirthdays!Theyarealotoffun.HereinJamaicawehaveanoldcustom.2Guesswhatwedo?Wethrowflour面粉atourfriends!It'smybestfriend'sbirthdaytomorrow. 3I'mgoingtobuyalotofflourtothrowathim. VictoriaSmithLondonUK Mygrandmotherisgoingtobe100yearsoldinJune.She'sveryexcitedbecauseshe'sgoingtogetaspecialletterfromtheQueen.TheQueensendsalettertoeverypersonwhoreaches100. 4. JiangLiBeijingChina Inmycountrywecelebratebirthdayswithaspecialtypeofthefood.Noodlesareasignoflonglifeforus.ThisyearI'mgoingtomakesomelonglifenoodlesforallmyfriends.5andhaveagreatevening! 根据短文内容从选项中选出能填入文中空白处的最佳选项选项中有一项为多余选项. A.I'mgoingtogotothestoresoon. B.I'mgoingtomakeabigcake. C.It'satraditionthatmakespeopleveryhappy. D.Weliketosurprisepeopleontheirbirthdays. E.We'regoingtoeatthemtogether F.Wealwayseatfairybreadonourbirthdays

已知点PABC在同一个球的球表面上PA⊥平面ABCAB⊥AC则该球的表面积为

菜粉蝶其性别决定方式为ZW型的体色和眼色分别由等位基因A/a和B/b控制其中携带基因A的个体体色外显率为75%杂合子中只有75%表现为显性．用纯种菜粉蝶作为亲本进行杂交杂交组合和实验结果如表所示． 请回答下列问题 1根据实验结果可知控制眼色的基因位于染色体上为显性． 2杂交组合一中父本和母本的基因型分别为．其F1中♂灰身红眼♂黑身红眼♀灰身红眼♀黑身红眼的分离比为．若让F1自由交配则F2中黑身白眼菜粉蝶的基因型为所占比例为． 3让杂交组合二的F1中灰身红眼与黑身白眼菜粉蝶杂交F2雄菜粉蝶的表现型及比例为．

在某生态系统中植物昆虫甲昆虫乙存在捕食关系植物一昆虫甲→昆虫乙假设该生态系统只有一条食物链．回答下列问题 1该生态系统的碳循环在生物群落与之间的循环主要是以的形式进行的其特点是碳可以被生物群落． 2乙与甲的数量比值填能或不能代表两种昆虫的能量传递效率理由是． 3昆虫乙的数量増加一段时间后植物的数量也增加其原因是．

下列有关生物大分子的叙述错误的是

30分Igotaboardandsatdowninmyseat.Itwasgoingtobealongflight.Aroundmeweresome1Whereareyouheaded?Iasked. LakesAirBase.We'llbethereforspecialtrainingandthentothefront. Afteraboutanhouranannouncementwasmadethatboxluncheswere2forfivedollars.ThejourneywouldbeseveralhoursandIdecidedtobuyone. AsI3formywalletIheardasoldieraskhisfellowsifhewouldbuylunch.Nothatseemsalotofmoneyforjustaboxlunch.Ilookedaroundattheothersoldiers.4werebuyinglunch.Iwalkedtothebackoftheplaneand5theflightattendantafifty﹣dollarbill. Takealunchtoallthosesoldiers.Isaid.Sheseizedmyarmstightly.Hereyeswetwithtearsshe6meMysonisasoldierinthefrontit'salmostlikeyouaredoingitforhim. Pickinguptenboxessheheadedtothesoldiers. AftereatingonmywaytotherestroomIwas7byaman.Isaw8youdidandIwanttobepartofit.Withthishehandedmetwenty﹣fivedollars. SoonafterIreturnedtomyseatIsawtheFlightCaptaincominglookingattheseatnumbers9hewalked.Whenhegottomyrowhestoppedsmiledheldouthis10andsaidIwantto11yourhand.Istoodandtookhishand.WithaloudvoicehesaidIwasasoldier.12someoneboughtmealunch.Itwassuchanactof13thatIneverforgot.Iwasalittlebit14whenapplauserangoutfromallofthepassengers.Thesesoldiersweregivingtheirallforourcountry.Icouldonlygivethemacoupleofmeals. LaterwhenIwalkedtothefrontoftheplanetostretchmylegsaman15anothertwenty﹣fivedollarsinmyhand. Whenwe16Igatheredmybelongingsandstartedtoleave.Amanstoppedmeputsomethinginmypocketandwalkedaway17aword.Anothertwenty﹣fivedollars!Seeingthesoldiers18attheterminalIwalkedovertothemandhandedthemseventy﹣fivedollars.AsIwalked19tomycarIprayedfortheirsafe20. 1A.strangers B.soldiers C.attendants D.passengers 2A.available B.reasonable C.convenient D.special 3A.prepared B.sent C.reached D.paid 4A.None B.Some C.Many D.All 5A.lent B.showed C.handed D.charged 6A.advised B.greeted C.inspired D.thanked 7A.praised B.stopped C.attracted D.discovered 8A.how B.which C.what D.that 9A.as B.though C.till D.unless 10A.tongue B.arm C.head D.hand 11A.feel B.seize C.Shake D.check 12A.Once B.Later C.Recently D.Frequently 13A.performance B.kindness C.bravery D.wisdom 14A.embarrassed B.relieved C.overjoyed D.satisfied 15A.threw B.found C.took D.left 16A.separated B.landed C.paused D.chatted 17A.in B.for C.through D.without 18A.training B.shouting C.gathering D.marching 19A.casually B.Anxiously C.disappointedly D.lightheartedly 20A.arrival B.return C.flight D.escape

中国是世界上少数能够制造运输液化天然气专用船舶﹣﹣LNG船的国家．液化天然气的主要成份为甲烷甲烷的熔点﹣182.5℃沸点﹣161.5℃．LNG船在运输液化天然气过程中储罐内最适宜的温度是

10分假定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下作文.文中共有10处语言错误每句中最多有两处.每处错误仅涉及一个单词的增加删除或修改. 增加在缺词处加一个漏字符号∧并在其下面写出该加的词. 删除把多余的词用斜线﹨划掉. 修改在错的词下划一横线并在该词下面写出修改后的词. 注意1.每处错误及其修改均仅限一词 2.只允许修改10处多者从第11处起不计分. Haveyoueverhadaheadacheduringatest?Haveyoueverbeentooworriedaboutsomethingthatyouhaveaheadacheorevencan'tsleepatnight?Ifsothenyouknowthatstressis. Notallstressisbadforyou.Somekindsofstresscanhelpyougetthingsdobetterlikewhenyouarerunningtowardsthefinishinglineorwhenyouarebeingaskedtogiveaspeechtoyourclass.Stresssometimescanhelppushyoutomakefullpreparationforatest.Howevertoomuchstresscanresultinangerdepressionandotherrelatedproblemswhichweneedtotakeserious. Therearemanythingsinourlifewhatmightcausestress﹣﹣﹣﹣﹣﹣havingtoomuchhomeworktakingadifficulttestandhavingeconomicproblems. It'simpossibletoliveinalifecompletelyfreeofstresssoyoushouldlearntodealwithstress.Thebestwayreducestressistohaveabalancelife.Ifyougetenoughsleepeatproperlytakemoreexerciseandhaveenoughfuntimeyou'llprobablyfeellessstressed.

8分Contrarytotheimpressionthatgrandmothersaredelightedtohelptheirgrowndaughtersandcarefortheirgrandchildrenastudyofmultigenerationalfamiliesshowsthatmanyolderwomenhatethefrequentdemandsthattheyoungergenerationsmakeontheirtimeandenergy. YoungwomenwithchildrenareunderalotofpressurethesedaysandtheyexpecttheirmotherstohelpthempickupthepiecesnotedDr.BertramJ.CohlerabehavioralscientistattheUniversityofChicago.ThisisoftenthestrongestsourceofcomplaintonthepartofGrandmotherwhohasfinishedwithchildcaringandnowhasherownlifetolive.Grandmothersliketoseetheirchildrenandgrandchildrenbutontheirowntime. Dr.CohlerisdirectorofastudysponsoredbytheNationalInstituteofAgingof150workingclassfamiliesthatliveinaMidwesternsuburb.HeandDr.HenryU.GruebaumofHarvardMedicalSchoolhavealreadycompletedtheirstudyoffoursuchfamiliesinNewEngland. Dr.Cohlertellsofamiddle﹣agedBostonwomanwhoworksasacookallweekandforherparish教区onSundays.EverySaturdayheronedayoffherdaughterandfamilyvisitexpectingmothertomakelunchshopandvisit.That'snothowshewantstogrowoldsaidDr.CohlerwhowastoldbytheolderwomanMydaughterwouldneverspeaktomeifsheknewhowangryandunhappyIget. InallthefourNewEnglandfamiliesstudiedtheolderwomendislikedthenumerousphonecallsandvisitsfromtheirgrowndaughterswhooftenturnedtothemothersforadvicephysicalresourcesloveandcompanionshipaswellasbaby﹣sittingservices.Americansocietykeepsincreasingtheburdensforolderpeopleparticularlythoseintheir50sand60sDr.Cohlersaidinaninterviewhere.They'restillworkingandthey'retakingcareoftheirgrownchildrenandmaybealsotheiragedparents.Sometimeslifegetstobetoomuch. 1Whichofthefollowingisclosestinmeaningtotheexpressionpickupthepiecesinthesecondparagraph? A.Saveabadsituation. B.Putchildren'stoysintheirproperplaces. C.Gatheruppiecesofclothing. D.Keeptheroomingoodorder. 2Themiddle﹣agedBostonwoman. A.expectshermothertocooklunchforher B.enjoystheroomingoodorder C.visitsanolderwomaneverySaturday D.workssixdaysaweek 3Thepassageismainlyabout. A.youngwomen'sinabilitytolookaftertheirchildren B.Grandmothers'attitudestowardhelpingtheirgrowndaughters C.averageAmericanwomen'sfamilylife D.grandmothershouldgivemorehelptotheirdaughters 4FromDr.Cohler'sstudywemayreachtheconclusionthat. A.daughtersshouldbeindependentoftheiroldgrandmothers B.grandmothershouldgivemorehelptotheirdaughters C.mothersanddaughtersshouldsupporteachother D.daughtersshouldbemoreconsideratetowardtheirmothers

高速公路已广泛应用ETC收费系统可对过往车辆无需停车即能实现收费的电子系统如图是某高速公路入口处的EC通道示意图．现有一辆总质量M＝1500kg的汽车在进入ETC收费岛区域前s1＝50m处开始减速经t1＝4s后运动至ETC收费岛图中阴影区域边界然后再经t2＝6s匀速通过ETC收费岛其长s2＝36m．不计车长． 1求汽车从减速开始到离开ETC收费岛全过程的平均速度大小 2若汽车在ETC收费岛匀速行驶所受阻力为车重力的0.2倍求汽车通过ETC收费岛牵引力所做的功．

如图所示小华站在地铁玻璃安全门外候车．地铁到站后玻璃门向两侧打开小华在左右两侧玻璃门中成像的情况分析正确的是

1917年布里奇斯在培养的正常翅果蝇中偶然发现一只翅膀后端边缘有缺刻的红眼雌果蝇．研究表明这是由于该果蝇的一条X染色体缺失一小段导致的．一对同源染色体中的一条缺失个体存活两条都缺失个体死亡．染色体缺失过程中会断裂出无着丝点的片段．这些片段无法进入细胞核而只能留在细胞质中在新的细胞周期中凝集成微核游离在细胞核之外． 1微核的形成是由于断裂的片段没有着丝点从而无法通过的牵引进入细胞核．依据以上的研究科学工作者常通过观察处于期的果蝇细胞中有无来确定染色体是否发生缺失． 2控制果蝇眼色红眼对白眼为显性的基因A/a位于X染色体上．现有各种性状的雌雄果蝇若干只请设计杂交实验探究该缺刻翅红眼雌果蝇不含白眼基因的缺失片段中有无控制眼色的基因． 实验思路 预测结果及结论 ①如果后代雌果蝇则缺失片段中没有控制眼色的基因． ②如果后代雌果蝇则缺失片段中有控制眼色的基因．

8分Areyoufeelingblue?AnAmericanstudysuggeststhatbeingsurroundedbyhappyfriendsandneighborscouldhavemoreofaneffectonyourhappinessthanmoney.ThatisthefindingofresearchersfromHarvardUniversityandtheUniversityofCaliforniaatSanDiego. NicholasChristakisandJamesFowlerstudiedtheemotionalhealthofmorethanfourthousandsevenhundredpeople.TheyusedinformationfromtheFraminghamHeartStudy.ThatstudybegansixtyyearsagointheAmericancommunityofFraminghamMassachusetts.Itwasstartedtolearnmoreabouttherisksofheartattackandstroke.ForthenewstudytheresearchersexaminedtheemotionsofthemenandwomenintheFraminghamHeartStudy.Theinformationwasgatheredfrom1983to2003. Theresearchersfoundthatfriendsofhappypeoplehadagreaterchanceofbeinghappythemselves.Thatmeansthathappinessspreadsorhasacontagiouseffectamongpeople.Andthesmallerthephysicaldistancebetweenfriendsthelargertheeffecttheyhadoneachother'shappiness.Forexampleapersonwastwentypercentmorelikelytofeelhappyifhis/herfriendlivingwithinoneandahalfkilometerswasalsohappy.Havingahappyneighborwholivednextdoorincreasedanindividual'schanceofbeinghappybythirty﹣fourpercent.Theeffectsoffriends'happinesslastedforuptoayear. Anotherfindingwasthatpeoplewhoworkedtogetherorweremarrieddidnothaveasmuchoftheeffectonhappinesslevelsasfriendsdid.Theresearcherssaidthiswasoftentrueamongfriendsofthesamesex. AreportonthefindingswaspublishedthismonthintheBritishMedicalJournal.America'sNationalInstituteonAginghelpedtopayforthestudy.Someresearcherswhowerenotinvolvedwiththestudyquestioneditsfindings.Theysaidtheresultscouldbedisputed争议unlessaseparatestudyshowedsimilarfindings. 1Whatdoesthistextmainlytellus? A.Howtoliveahappylife? B.One'shappinessinfluencesothers. C.Howtokeepemotionshealthy? D.Ascientificexperiment. 2Fromthistextweknowthat. A.NicholasandJamesbasedtheirfindingsonthestudyofamedicalresearch B.NicholasandJameshavebeendoingtheirresearchformorethantwentyyears C.apersonwithahappyfriendhasmorechanceoffeelingblue D.ahappypersonismorelikelytosufferfromheartattack 3AccordingtothistextwhichofthefollowingfourpersonsmayhavealargereffectonMrs.Smith'shappiness? A.Mr.GreenSmith'sformerclassmate. B.Mr.ThomasSmith'scolleague. C.Afriendinanothercity. D.Ahappysingleladynextdoor. 4Whatdoesthelastparagraphimply? A.Someresearchersstilldonotagreetothefindingsbythetwoexperts. B.Moreresearchesarestillneededtobedonebeforeabetterconclusionismade. C.America'sNationalInstituteonAginggavemuchsupporttothetwoexperts. D.Moreandmorescientistsbecomeinterestedintheresearchbythetwoexperts.

10分假定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下作文.文中共有10处语言错误每句中最多有两处.每处错误仅涉及一个单词的增加删除或修改. 增加在缺词处加一个漏字符号∧并在其下面写出该加的词. 删除把多余的词用斜线\划掉. 修改在错的词下划一横线并在该词下面写出修改后的词. 注意1.每处错误及其修改均仅限一词 2.只允许修改10处多者从第11处起不计分. WiththegrowingpopularityoftheInternetmoreandmorechildrenareaddictedtoplayonlinegamesdayandnight.Itdoesharmnotonlytotheirhealthespecialtheireyesbutalsototheirstudies. Comparingwithonlinegamesmanytraditionalgameslikehide﹣and﹣seekbenefitskidsmentallyandphysically.Theywereeverpopulartoseveralgenerationswhichnotonlylearnedsomethingvaluablebutalsohadfunplayingthegames.Thereforethegamesaredyingawaynow. PersonallyIthinkteachersandparentsshouldtakemeasuretolimittheirchildren'sInternettime.Letchildrentoknowtheharmofonlinegamesandthebenefitsoftraditionalgames.Helpchildrenjudgehealthyandunhealthygames.What'smoreweshouldoftenorganizeeventsforchildreninwhichtraditionalgamesplayed.

8分Itisnotonlypraiseorpunishmentthatdeterminesachild'slevelofconfidence.Therearesomeotherimportantwaysweshapeourkids﹣particularlybygivinginstructionsandcommandsinanegativeorpositivechoiceofwords.ForexamplewecansaytoachildDon'trunintotraffic!orStayonthefootpathclosetome.Inusingthelatteryouwillbehelpingyourkidstothinkandactpositivelyandtofeelconfidentinawiderangeofsituationsbecausetheyknowwhattodoandaren'tscaringthemselvesaboutwhatnottodo. Actuallyitisallinthewaythehumanmindworks.Whatwethinkweautomaticallyrehearse预演.Forexampleifsomeoneofferedyouamilliondollarsnottothinkofabluemonkeyfortwominutesyouwouldn'tbeabletodoit.WhenachildistoldDon'tfalloffthetreehewillthinkoftwothingsdon'tandfalloffthetree.Thatishewillautomaticallycreatethepictureoffallingoffthetreeinhismind.Achildwhoisvividlyimaginingfallingoffthetreeismuchmorelikelytofalloff.SoitisfarbettertouseHoldontothetreecarefully. Clearpositiveinstructionshelpkidstounderstandtherightwaytodothings.Kidsdonotalwaysknowhowtobesafeorhowtoreacttothewarningofthedangerinnegativewords.Soparentsshouldmaketheircommandspositive.SamholdonfirmtothesideoftheboatismuchmoreusefulthanDon'tyoudaretofalloutoftheboat?orworsestillHowdoyouthinkI'llfeelifyoudrown?Thechangesaresmallbutdifferenceisobvious. Childrenlearnhowtoguideandorganizethemselvesfromthewayweguidethemwithourwordssoitpaystobepositive. 1Positivechoiceofwordshelpskidsto. A.builduptheirconfidence B.learnindifferentsituations C.improvetheirimagination D.dothingscarefully 2WhatcanweinferfromParagraph2? A.Achildwillactonwhatisinstructed. B.Onecan'thelpimaginingwhatisheard. C.Achildwillfalloffthetreewhentoldnotto. D.Onewon'tthinkofabluemonkeywhengivenmoney. 3Whichofthefollowingcommandshelpskidstobesafe? A.HowdoyouthinkI'llfeelifyougethurt? B.Don'tplaybythelake. C.Fastenyourseatbelt. D.Don'tyoudaretowalkthroughtheredlight? 4Themainideaofthepassageisthat. A.praisemakeskidsconfident B.rightinstructionskeepkidssafe C.clearcommandsmakekidsdifferent D.positiveinstructionsguidekids

草本植物报春花多数为二型花柱少数为同型花柱．二型花柱的花中花药的位置明显低于柱头的为长柱型花柱头位置明显低于花药的为短柱型花．同型花柱的花中花药与柱头高度相近．研究发现随着海拔高度增加高山上环境温度降低传粉昆虫减少同型花柱的花比例增大．为研究产生上述现象的原因科研人员进行相关的模拟实验处理及实验结果如图所示．下列分析不正确的是

30分 ABrick砖inLife AyoungandsuccessfulmanagerwasdrivingdownaneighborhoodstreetgoingabittoofastinhisnewJaguar.Hewas1kidsrushingoutfrom2parkedcarsandsloweddownwhenhethoughthesawsomething. 3hiscarpassedonechildappearedandabrickknockedintotheJaguar'ssidedoor.Hesteppedonthe4andturnedtheJaguarbacktothespotfromwherethebrickhadbeenthrown. Hejumpedoutofthecargrabbedthekidand5himagainstaparkedcarshoutingWhatwasthatallaboutandwhoareyou?Justwhat6areyoudoing?ThenhewentonDidn'tyouknowthatbrickyouthrewisgoingto7alotofmoney.Whydidyoudoit? Pleasesir.PleaseI'msorry.Ididn'tknow8elsetodo!beggedtheyoungster. 9mybrotherhesaid.Herolledoffthesidewalkandfelloutofhis10andIcan'tlifthimup. CryingtheboyaskedthemanagerWouldyoupleasehelpmegethim11intohiswheelchair?He'shurtandhe'stoo12forme. Moved13wordsthedriverliftedtheyoungmanbackintothewheelchairand14hishandkerchiefandwipedthescrapesandcutsoftheboycheckingtosee15everythingwasgoingtobeokay. Thankyousir.AndGodblessyouthe16childsaidtohim.Themanthen17thelittleboypushhisbrothertothesidewalktoward18home. Itwasalong19backtohisJaguar﹣alongslowwalk.Heneverdidrepairthesidedoor.Hekeptthedent凹痕to20himnottogothroughlifesofastthatsomeonehastothrowabrickatyoutogetyourattention. 1A.watchingfor B.lookingfor C.headingfor D.leavingfor 2A.above B.between C.in D.through 3A.While B.Before C.As D.After 4A.window B.wheel方向盘 C.brake刹车 D.door 5A.pushed B.pulled C.held D.caught 6A.inearth B.onearth C.afterall D.aboveall 7A.spend B.charge C.cost D.pay 8A.which B.who C.that D.what 9A.It's B.Which's C.That's D.Who's 10A.Jaguar B.wheelchair C.sidewalk D.bike 11A.up B.down C.back D.forward 12A.light B.funny C.terrible D.heavy 13A.beyond B.inside C.outside D.around 14A.brokeout B.tookout C.runout D.gaveout 15A.what B.where C.that D.which 16A.angry B.willing C.satisfactory D.grateful 17A.watched B.glared C.noticed D.witnessed 18A.his B.their C.her D.its 19A.journey B.trip C.walk D.running 20A.attract B.advise C.inform D.remind

小鼠的毛色性状由X染色体上的一对等位基因B/b控制只含B基因表现为黑斑只含b基因表现为白斑同时含有B和b基因的个体表现为黑白斑．小鼠的尾长性状由常染色体上一对等位基因T/t控制T对t完全显性．用一只长尾黑斑雌鼠与一只短尾白斑雄鼠为亲本进行杂交获得多只子代F1其中无论雌雄都有长尾和短尾个体．回答下列问题 1根据F1的结果填能或不能判断出长尾与短尾的显隐性亲本长尾黑斑鼠的基因型是F1中短尾白斑雄鼠所占比例是． 2研究人员进一步让F1中雌雄个体随机交配统计F2中长尾与短尾个体之比约为23无性别差异．据此推测出现此结果最可能的原因是请设计杂交实验加以证明写出实验思路结果及结论．

下列有关细胞生命历程的叙述错误的是

8分 C Playingvideogamesandgettingmoneyforitseemslikeadreamjobformanyoftoday'steenagers.Butisitallfunandgames? Bigbusiness Proprofessionalgamingiscertainlybigbusiness.In2017thereweremorethan3000gamingcompetitionsandover10000professionalplayersworldwide.Alargenumberofpeoplewatchtheircompetitionsonlineandsuccessfulgamerscangetmorethan1000000dollarsfromprizemoneyandads.Theindustryisclearlythriving. Whatittakes Becomingaprofessionalisnotjustaboutbeinggoodatplayinggames﹣italsotakesalotofhardwork.Someprogamerspracticeforfourteenhoursaday.Youneedtospendmuchtimeandputallyoureffortstoitsaysex﹣gamerGeorge. Notallfunandgames Itcanbeadifficultjobaswell.Stressisabigproblemforgamers.Tirednessisanotherandinjuries受伤arecommon.TopplayerHaiLamhadwrist手腕problemsafteryearsofprogaming.Careers生涯areshortandmanygamersretire退休beforetheyare30andtrytofindanotherjob. Howeverthebadpointsprobablywon'tchangethedreamsofmanyteenagegamers.AndangryparentsarestilllikelytoheartheexcuseButI'mjustpracticingformyfuturejob! 1Howmanyprofessionalplayersweretherearoundtheworldin2017? A.130000. B.Morethan3000. C.Over1000000. D.Morethan10000. 2WhatdoestheunderlinedwordthrivinginParagraph2mean? A.Gettingworse. B.Doingwell. C.Developingslowly. D.Changingquickly. 3Whatcanweinferfromthelastsentenceofthepassage? A.Childrenareangrywiththeirparents. B.Teenagerspracticegamesfortheirfuturejobs. C.Someteenagersarecrazyaboutplayinggames. D.Parentsstoptheirchildrenplayinggamessuccessfully. 4What'sthemainideaofthepassage? A.Progamingisn'tallfunandgames. B.Thecareerasaprogamerdoesn'tlastlong. C.Beingaprogamerisagoodchoiceforteenagers. D.Beingaprogamerisaneasywaytomakemoney.

25分随着社会对富二代各方面负面新闻不断报道最近你校学生就金钱是否能带来幸福这一话题进行了一场激烈的辩论辩论的结果如下图所示 请根据以上素材为某英语报社写一篇英语稿件介绍这次辩论的内容并谈谈你如何看待金钱. 注意1.词数100左右 2.开头已给出但不计入总词数 3.不要逐条翻译可适当发挥以使行文连贯. Recentlywehavehadadiscussionaboutwhethermoneycanbringushappiness.

某兴趣小组运用化学知识进行系列实验． ①甲同学对河水样品进行净化处理流程如图甲．其中加入活性炭是利用其性除去水样中的色素和异味加入氯气的作用是操作M是得到的清水属于选填纯净物或混合物． ②乙同学进行粗盐提纯的实验称量粗盐和所得精盐的质量如图乙所示加入称量物前均已进行去皮操作图一中天平的读数是g．该同学得到的精盐质量偏大可能的原因是．

8分Youmaythinkthatsailingisadifficultsportbutitisreallynothardtolearn.Youdonotneedtobestrong.Butyouneedtobequick.Andyouneedtounderstandafewbasicrulesaboutthewind. FirstyoumustaskyourselfWhereisthewindcomingfrom?Isitcomingfromaheadorbehindorfromtheside?Youmustthinkaboutthisallthetimeontheboat.Thewinddirectiontellsyouwhattodowiththesail. Let'sstartwiththewindblowingfromthebehind.Thismeansthewindandtheboataregoinginthesamedirection.Thenyoumustalwayskeepthesailoutsidetheboat.Itshouldbeata90°angletotheboat.Thenitwillcatchthewindbest. Ifthewindisblowingfromthesideitisblowingacrosstheboat.Inthiscaseyoumustkeepthesailhalfwayoutsidetheboat.Itshouldbeata45°angletotheboat.Itneedstobeoutfarenoughtocatchthewindbutitshouldn'tflap摆动.Itshouldn'tlooklikeonaflagpole.Ifitisflappingitisprobablyouttoofarandtheboatwillslowdown. Sailingintothewindisnotpossible.Ifyoutrythesailwillflapandtheboatwillstop.Youmaywanttogointhatdirection.Itispossiblebutyoucan'tgoinastraightline.Youmustgofirstinonedirectionandtheninanother.Thisiscalledtacking.Whenyou'retackingyoumustalwayskeepthesailinsidetheboat. 1Whatshouldyouconsiderfirstwhilesailing? A.Sailors'strength. B.Winddirections. C.Sizeofsail. D.Wavelevels. 2WhatdoesthewordItinParagraph4referto? A.Thesail. B.Thewind. C.Theboat. D.Theangle. 3Whatdoyouhavetodowhensailingagainstthewind? A.Moveinastraightline. B.Allowthesailtoflap. C.Tacktheboat. D.Lowerthesail. 4Wherecanyouprobablyfindthetext? A.Inatouristguidebook. B.Inaphysicstextbook. C.Inanofficialreport. D.Inapopularmagazine.

正确实验操作是实验成功与安全的保证．下列实验操作正确的是

光从空气斜射入水中反射光线如图所示请画出对应的入射光线和折射光线的大致位置．

8分Americankidsaretakingmoreteststhaneverbeforeandthey'restressedout.Ishelpontheway?Justthesightofatestbookletmakessomekidssweat.Forothersitisablankanswersheet.ThentherearethedreadedwordsTakeoutyourNumber2pencil.Allthesefill10﹣year﹣oldChelseaLogowithfear.IstarttotapmypencilonthedesksaysthefifthgraderfromTolucaLakeElementarynearLosAngelesCalifornia.ThenIfeelthebutterfliesinmystomach. Chelseaisnotalone.InarecentsurveybyKidsHealthmorethan70%ofkidsaged9to13saidtheyworryabouttests.It'snowonder.AcrosstheUnitedStatespublicschoolsgivemorethan250millionstandardizedtestseachyear. Whydokidshavetotakesomanytests?TheNoChildLeftBehindNCLBlawrequiresthatstudentsingrades3through8betestedeachyear.Thelaw'sgoalisforallstudentstobeatgradelevelby2014.Studentsmustpassthetestsandmeetotherrequirementsortheirschoolsmaybeshutdown. TheU.S.SecretaryofEducationArneDuncanwantstochangeNCLB.Butthatdoesn'tmeanhefavorsgettingridoftests.Duncanbelievestestsshouldbeusedmainlytoevaluatekids'strengthsandweaknesses.TestsDuncansaysshouldnotbeusedtopunishkidsortheirschoolsforfailure.ThegoalistofocusongreatteachingandlearningDuncansaid. UnderNCLBeachstatesetsitsownstandardsforstudentstomeet.TheresultDuncansaysisthatstatesaremakingthetestseasier.Tofixthisproblem48statesarenowworkingtogethertocreatecommonstandards.IwanttosetahighbarforkidsDuncansayssothey'llbeingreatshapetoachievetheirdreams. Likethemornottestsareheretostay.Sohowcanyouhandletestnerves?Schoolsareteachingstudentstorelaxthroughdeepbreathing.andstretching伸展运动.InOaklandCaliforniaPrincipalZarinaAhmadofPiedmontAvenueElementaryleadsherstudentsinacheertogetthemexcitedaboutlearning. KidsareunderhighpressuresaysAhmad.Therehastobetimeforkidstobekids.Stillweneedteststohelpusassesswhatstudentshaveyettolearn. 1Theunderlinedpartthebutterfliesinmystomachcanbereplacedby. A.guilty B.nervous C.exciting D.proud 2AccordingtothepassagetheNCLBlaw. A.isfocusingonteachingmethodsinschools B.isrequiringschoolstomakethetestsmoredifficult C.istryingtomakeschoolsberesponsibleforstudents D.aimstoevaluatekids'strengthsandweaknessesbymeansoftests 3WecanlearnfromthepassagethatArneDuncan. A.isstronglyagainsttests B.suggestsclosingsomeschools C.isconcernedaboutstudents'development D.suggestseachstatesetitsownstandard 4Wecanlearnfromthelasttwoparagraphsthat. A.it'spossibletogetridoftests B.schoolshavenogoodwaytodealwithstudents'stress C.testshelpassesswhatstudentshavetolearn D.schoolsareawareofstudents'stresscausedbytests

如图是某种加钙食盐包装标签上的部分内容．请仔细阅读后回答以下问题 1为了检验此盐中是否含有碳酸钙在家庭厨房里可选用的物质是． 2为了测定此盐中的碳酸钙含量取50g这种盐溶于水加入足量盐酸生成0.66g二氧化碳．请计算此加钙食盐中碳酸钙的质量分数．

如图为甲乙丙丁四种单基因遗传病的遗传系谱图其中9号个体不携带致病基因．下列相关叙述正确的是

1分Mybrotherhasahealthylivinghabit.Hestaysuplateandheisanearlybird. A.usually B.hardly C.often D.always

下列物态变化事例中属于液化的是

大数据处理能及时获取更多的信息．以下图象与实验表述对应正确的是

如图所示请根据通电螺线管周围磁感线的方向判断电源的+﹣极和小磁针的N极并在图中标出．

30分WhenIwasinmiddleschoolIgotmadatmyparentsbecausetheywouldnevergiveanythingtothehomeless.Istillrememberonafamily1inWashingtonD.C.therewasahomelessmandownthestreet.OnourfinaldayinthecitywhenmyparentswentforaneveningwalkIwentoutofourhotelroom2andrandownthestreettothehomelessman. Helookedatmewith3surelynot4anythingfromamiddleschoolgirl.Iranintothesupermarketwithout5downtheblockand6fivehamburgersthreebagsofchipsonechocolatebarmyfavoritecandyandabottleofwater.Iranbackwithabig7onmyfaceand8thebagstohim.Healsosmiledatme.Hissmilehasbeeninmy9eversince. Whenmyparents10mydadaskedmeifhadrememberedthehomelessmandownthestreetfromourhotelandInervouslynodded.Hethentoldme11theywerereturningfromtheir12thehomelessmanwassharingbags13offoodwithotherhomelesspeopleandtheywereallsmilingastheyate.Ismiledatmydadbut14tothisdayhaveItoldhimthe15storyofthathomelessman. Istillhaven'tforgottenthatman'ssmilebutIwishIhadthe16todothismoreoften.Onesmall17actofamiddleschoolgirlcanbeginarippleeffect连锁反应ofsmiles.Soplease18asmilesandgivesome19tothehomelessevenifyoucan't20tohelpthem. 1A.relaxation B.entertainment C.vacation D.ceremony 2A.nervously B.proudly C.sincerely D.secretly 3A.imagination B.curiosity C.satisfaction D.sympathy 4A.expecting B.begging C.admitting D.requiring 5A.doubt B.recognition C.hesitation D.exception 6A.bought B.accepted C.ordered D.delivered 7A.smile B.sweat C.mark D.sign 8A.fetched B.handed C.contributed D.devoted 9A.experience B.view C.opinion D.mind 10A.fled B.waited C.returned D.approached 11A.before B.as C.until D.though 12A.concert B.theater C.cinema D.walk 13A.full B.filled C.crowded D.occupied 14A.ever B.rarely C.never D.seldom 15A.genuine B.honest C.generous D.true 16A.patience B.courage C.confidence D.ambition 17A.priceless B.careless C.helpless D.fearless 18A.share B.receive C.value D.force 19A.donation B.recognition C.dignity D.opportunity 20A.refuse B.afford C.wait D.choose

10分Itisagreatthingtohelpothers.Firstyoucanlearnnewthings.Seconditcanalsomakeyoufeelgood. Howcanyoudoit?Helpingthroughcharities慈善团体isagoodidea.Charitiesareorganizations组织thathelpothers.September5istheInternationalDayofCharity. Youcanhelpcharitiesbygivingyourtimegivingmoneyorgivingthingsthatyouown. ●Volunteering Volunteeringistogivetimetohelpotherswithoutpay.Somewaysofvolunteeringare ☆visitingoldpeopletotalktothemorhelpthem ☆walkingdogsatananimalshelter收容所 ☆cleaningupapark ☆helpingsomechildren.Youcanteachthechildrenwithoutlifeskillshowtotakecareofthemselves. ●Fundraising Fundraisingistocollectorproducemoneytoacharitytohelpothers.Somewaysoffundraisingare ☆makingcakesorbiscuitstosell ☆doingsponsored有赞助的activities.Forexamplefamiliesandfriendsgiveyoumoneyifyoufinishalongwalk. ●Donating Donatingistogiveyourthingstoacharitytohelpothers.Somewaysofdonating are ☆givingyouroldtoysorclothestoacharitythathelpssickchildrenorpoorpeople ☆givingyouroldbookstoalibrary. Sowhatcanyoudotohelpothers? 1Whyisitagreatthingtohelpothers?atleastone 2WhichdayistheInternationalDayofCharity? 3TranslatetheunderlinedsentenceintoChinese. 4Marymakessomemoneybydrawingpictures.Shegivesthemoneytoacharity.Itisawayof.填写序号A或B或C A.volunteering B.fuundraIsil C.donating 5Giveapropertitletothepassage.

相关说法正确的是

8分I'mnotsosureIlikemyfriendsanymore.Iusedtolikethem﹣tobehonest.We'dhavelunchtalkonthephoneorexchangeemailsandtheyallseemednormalenough.ButthencameFaceBookandIwasintroducedtoasadfactmanyofmyfriendshavedarksidesthattheyhadkeptfromme. TodaymyfriendsshowoffthemoreunpleasantaspectsoftheirpersonalitiesviaFaceBook.Nolongerhiddenthey'rethrowninmyfacelikeTVcommercials﹣unavoidableandendlessadvertisementsfortheworstoftheirpersonalities. TakeFred.Ifyouweretohavelunchwithhimyou'dfindhimwarmandselfeffacing谦逊的.ReadhisFaceBookandyou'llrealizehe'sanunbearablefoodobsessedboringman.He'dpausetohaveacupofcoffeeonhiswaytosaveadrowningman﹣andthenwriteaboutit. TakeAndy.Youwon'tfindasmarterCEOanywherebutnowhe'saCEOwithoutacompanytorun.SoheplaysMafiaWarsonFaceBook.He'sdoingwell﹣level731.ThankstoFaceBookIknowhe'splayingabout18hoursaday.Andyyou'verunfourcompanies﹣andthisishowyouspendyourdowntime?Whathappenedtogolf?Whathappenedtogettinganotherjob? TakeLiz.Sheispositivethatthefluvaccinewillkillusallandthatweshouldavoidit.AndthencomesChriswholikestopostatleast20timesadayoneverywebsitehecanfindsoIgettoreadhisthoughtstwiceonceonFaceBookandonceonTwitter. InreallifeIdon'tseethesesidesofpeople.Facetofacemyfriendsshowmetheirbest.They'renicesmartpeople.ButfacetoFaceBookmyfriendsarelikeablinddatewhichgoeshorriblywrong. I'mleftwithadilemma.Whoismyrealfriend?IsittheLizIhavelunchwithortheantivaccinemadwomanonFaceBook?IsittheFredIcangrabasandwichwithortheFredwhoweepsifhe'satapartyandthewineisn'tuptohisstandards? 1Whoisopposedtothefluvaccineinthetext? A.Fred. B.Andy. C.Liz. D.Chris. 2What'sAndyprobablybusyindoingnow? A.He'srunninghiscompany. B.He'splayinggolfallday. C.He'slookingforanotherjob. D.He'splayingcomputergames. 3Theunderlinedworditinthelastparagraphrefersto. A.adilemma B.myrealfriend C.Facebook D.Twitter 4Thetextisdevelopedmainlyby. A.givingexamples B.followingthetimeorder C.listingfigures D.raisingquestions

某岛屿上有甲乙两种植物依靠一种蜂鸟传粉．甲种植物的花蕊查管直而短乙种植物的花蕊蜜管则弯而深．鸟的长鸟喙适于在长而弯曲的花蕊蜜管中采蜜雄鸟的短鸟喙适于在短小笔直的花蕊蜜管中采蜜．下列相关叙述正确的是

已知实数x∈[﹣11]y∈[﹣11]则满足不等式2x﹣y﹣1≤0的概率为

i是虚数单位复数的虚部是

1分Asmiddleschoolstudentswefollowthepublicruleswhereverwego. A.would B.should C.might D.could

如图水平地面ABCD以O点为界AO段是一种材质OD段是另一种材质．细线一端系在物体上绕过轻质滑轮另一端系在墙上拉滑轮的水平力F恒为4N物体经A点开始计时此后各段路程及耗时见下表．下列说法中正确的是

大气中的氮氧化合物 氮氧化合物NOx种类很多造成大气污染的主要是一氧化氮NO和二氧化氮NO2．NO通常为无色气体熔点为﹣163.6℃沸点为﹣151.5℃密度比空气略小微溶于水．它的性质不稳定易与空气中的氧气发生反应生成NO2．NO结合血红蛋白的能力比CO还强更容易造成人体缺氧．NO分子作为一种传递神经信息的分子在使血管扩张增强免疫力记忆力等方面有着极其重要的作用．NO2通常为红棕色有刺激性气味的气体密度比空气大溶于水生成硝酸HNO3和NO工业上利用这一原理制取HNO3．NO2能使多种织物褪色损坏多种织物和尼龙制品对金属和非金属材料也有腐蚀作用．城市大气中的NOx大多来自于化石燃料的燃烧．天然气的主要成分是甲烷同时也含有微量的氮杂质．经测算天然气煤和石油燃烧产生NOx的量分别为6.35kg/t8～9kg/t9.1～12.3kg/t．以汽油柴油为燃料的汽车尾气中NOx的浓度相当高．在非采暖期城市一半以上的NOx来自机动车排放． 依据文章内容回答下列问题 1造成大气污染的氮氧化物主要是． 2区分NO和NO2最简单的方法是． 3与煤和石油相比天然气是比较清洁的燃料结合数据解释原因． 4请说出一条减少NOx污染的具体措施是． 5下列有关NO和NO2的说法错误的是． A．二者可以互相转化 B．可以用同一种方法收集 C．对人类都有利也有弊 D．二者化学性质不同的原因是所含氧原子的个数相同

6分ChristmasEasterandBirthdaypartiescanbedifficulttimesforgrandmothersandparentsastheyrusharoundtryingtoarrangetheperfectcelebrationormakingeveryoneashappyaspossible!What'sbetterthanabirthdaypartythatmakesyourgrandchildsmilethroughoutoracelebrationthatimpressesrelativesandclosefriends? ThatiswhyGrannyLookhassuppliedinthissectiononeofthemostcomprehensiveguidestomakingthesespecialoccasionsthathappenperhapsonceayeararealsuccess. FromaselectionofAdventCalendarstopartyplanningorChristmas﹣stockingfillerswehaveallthepossibilitiescoveredsothatyourchildrenandgrandchildrenwillreallyhaveamemorabletimewithattractivegiftsandoriginalideas. Bringthatfestivespirittoallthosetraditionaldaysandensureyouarealwaysreadyforanypossibility.GrannyLook'sextensivelinksareboundtomakeeveryspecialoccasionanentirelydifferentexperiencefromtheyearbeforeandalloweveryonetofeelentertainedandcontent. CHRISTMAS﹣STOCKINGFILLERS LOOKnofurther！！GrannyLookhelpsthefamilytoprepareintimeforFATHERCHRISTMAS.GiveSANTACLAUSsomeideas.Hecanfillallthechildren'sChristmas﹣stockingswithgoodies!UniqueChristmasgiftsforchildren﹣stockingfillers. AGrannyLookfavorite! ADVENTCALENDARS Allchildrenlovethebuild﹣uptoCHRISTMAS!WhatisbetterthanchoosingoneofGrannyLook'sselectionofAdventCalendars!HereyouwillfindalistofwebsitestobuytraditionalorfunAdventCalendarsforchildrenatChristmastime. AGrannyLookfavorite! BIRTHDAYS LOOKINGforaSPECIALBIRTHDAYGIFT?ExploreGrannyLook'sselectionofPRESENTSPARTYPLANNINGPARTYTOYSandPARTYGAMESforyourChildrenandGrandchildren'sBIRTHDAYS. PlanandorganizetheKIDDIE'SPARTIESaheadoftime！！ Don'tforgetthePERSONALISEDINVITATIONS! CHRISTMAS LOOKandBOOKnow！！GrannyLook'sselectionofCHRISTMASGIFTSforchildren. SomeguidestoWhat'soninyourareaforthekids.PANTOSSHOWSTHEATRESatChristmastime! UNIQUEChristmasgiftsforChildren.SpendQUALITYTIMEwithyourChildren'sChildrenthisFESTIVESEASON! 1FromthetextweknowthatGrannyLookis. A.apersonwhoguidesyoutomakeyouryearlycelebrationarealsuccess B.amagazinethathelpsthefamilytoprepareforspecialoccasions C.acompanythatsellsallsortsofproductsontheInternet D.awebsitethathelpsyoutoprepareforspecialoccasions 2YouwillfailtofindanyinformationatChristmaswhenyouneed. A.Christmascards B.funAdventCalendars C.Christmasgifts D.ticketsfortheaters 3IfyoursonwantsatraditionalAdventCalendaryoushouldsearch. A.Birthdays B.AdventCalendars C.Christmas﹣stockingfillers D.Christmas

30分Allofuscangiveothersahandaslongaswearewillingtodoso.Actuallytherearesomepeopledoingkindthingsallthetime.SpreadingkindnessonegooddeedatatimeisKarlaGibson'smission.Iwisheveryonecouldjoinme.Therearesomany1thingsgoingonintheworld;ImeaneverydaysaidKarla. Karlahadthe2andsenseofdutyinDecemberof2013.Thesinglemotherofthreesaidshetendedtogetdownaroundtheholidayssoshe3todosomethingtocheerothersup.ShestartedaFacebookpageand4hergooddeedseachdayfromfeedingthehomelesstogivingEastergiftstotheincarcerated囚犯.Shehopedto5others. Wehavetodosomething.Our6canmakeadifferenceinsomeone'sday.You7knowwhensomeonemightbehavingtheirworstdayandthensomethinglikebuyingthemacoffeecanchangetheirwholeattitudeKarla8. Karla'sgreatest9sofarhadtodowithcoffee.OnSeptember27thKarla'sbirthdayshewenttoherlocalStarbucksandgavethe10$127topayforotherpeople'sdrinks.Shesatattheendofthedrive﹣thruholdinga11thatreadHaveagreatday.Sheendedup12about23customers.Itwasreallyfun.Itwas13oneofthebestbirthdaysevershesaid.Herkindnessthatdaydidn'tgo14.Onecouplewassogratefulthattheysurprisedherwithflowersandballoonstoshowtheir15. Karla'sactsofkindnesshavebecomea16affair.Hertwosonsarealways17others.SometimesI'llaskKyle‘Sodidyoudoanythingextranicetoday?'andhe'slike‘Somebody18somethinginthehallwayandIpickeditup'or‘Iheldthedoorforsomeone'thatkindofthingsaidKarla. It'sbecauseofMomthattheboysthinkit's19togiveahandtoothers.Ithinkit'sagreatideaofhers.It'salwaysnicetohelpsomeoneout20theyreallyneeditsaidKarla's15﹣year﹣oldsonChad. 1A.good B.bad C.new D.casual 2A.commitment B.appointment C.preference D.success 3A.managed B.agreed C.hesitated D.decided 4A.did B.mentioned C.shared D.missed 5A.greet B.inspire C.introduce D.remember 6A.kindness B.happiness C.stories D.sadness 7A.still B.often C.never D.even 8A.whispered B.explained C.reported D.replied 9A.surprise B.challenge C.concern D.moment 10A.cashier B.customer C.beggar D.secretary 11A.mark B.sign C.symbol D.flag 12A.payingfor B.pickingup C.payingoff D.pickingout 13A.occasionally B.usually C.probably D.hardly 14A.unoccupied B.unnoticed C.unorganized D.unquestioned 15A.wisdom B.existence C.generosity D.appreciation 16A.society B.love C.holiday D.family 17A.encouraging B.inviting C.helping D.affecting 18A.dropped B.bought C.found D.fell 19A.strange B.lucky C.cool D.funny 20A.after B.though C.unless D.when