一根绳子系着一个泡沫小球，悬挂在一个带电体A右边，小球静止时与带电体A等高且不接触，请画出小球受力示意图．

30分Manyofthescientistsandinventorswholivedlongagoarerememberedtodayandtheirinventionarewidelyused.Bytoday's1theyshouldhavebeenrichandfamous. 2manyofthemnevertastedthefruitoftheirsuccessintheirlifetime.Manyhadtospendtheirownmoney3theirinventions.Astheydidn'talwayssucceedthe4timemuchmoneywaswastedon5trialexperiments. 6peoplewantedtolendmoneytosuchexperiments7theywerenotalwaysfruitful.Thustheinventorhadtoworkwithmakeshift凑合的equipmentandtoolssometimestheyhadfulltimejobswhichprovidedthemwithsomefundstofinancetheirexperiments8supporttheirfamilies.Butevensoalargeamountofmoneywhichwentintotheexperimentswastakenoutofhouseholdexpenses. Youcanimaginethefamily9whichitmayhaveresultedin.povertylonelinessandfailureweremore10amongtheearlypioneersthanrichesand11. Today'sinventorshavea12betterdeal.Universitiesandgovernmentbodies13researchanddevelopment.Fundsare14todoexperimentsandtests.These15beindiversefieldslikemedicinedefenseagricultureeducationandhousing. Largecompanieseach16haveadepartmenttodevelopnewproducts.Inventorsandscientistsarepaidandprovidedwithup﹣to﹣daterequipmentto17theirtests.Theyareencouragedtodiscusstheirworkand18withotherscientists19seminars研讨会theInternetandjournals.Thisinteraction20newheightsofachievement. 1A.standards B.rules C.means D.laws 2A.Therefore B.However C.Besides D.Otherwise 3A.quitting B.copying C.testing D.checking 4A.first B.next C.last D.second 5A.detailed B.expanded C.abandoned D.repeated 6A.Many B.Rich C.Few D.Poor 7A.unless B.because C.though D.until 8A.aswellas B.orelse C.asgoodas D.orrather 9A.violence B.parties C.communication D.quarrels 10A.certain B.necessary C.common D.ordinary 11A.fame B.pride C.respect D.praise 12A.nearly B.relatively C.basically D.specially 13A.suggest B.forbid C.encourage D.force 14A.necessary B.precious C.limited D.available 15A.can B.must C.shall D.would 16A.still B.even C.hardly D.almost 17A.bringout B.makeout C.turnout D.carryout 18A.prize B.findings C.salary D.equipment 19A.for B.in C.through D.by 20A.looksupto B.holdsonto C.getsdownto D.givesriseto

塑料梳子梳头时头发容易被梳子粘起下列现象中粘的原因与其相同的是

有一种电动玩具鱼如图所示内部电路主要有电源小型电动机和小灯泡构成．白天开关S1闭合S2断开时只有电动机工作玩具鱼将会游动晚上开关S1和S2都闭合时电动机和灯泡都工作玩具鱼既游动又发光不玩时只需将S1断开．下列电路设计符合这种要求的是

下列说法正确的是

氯化铵焙烧菱锰矿制备高纯度碳酸锰的工艺流程如图 已知 ①菱镁矿石主要成分是MnCO3还含有少懿FeAlCaMg等元素 ②相关金属离弓[cMn+＝0.1mo1•L﹣1]形成氯氧化物沉淀时的pH如表 ③常温下CaF2MgF2的溶度积分别为1.46×10﹣107.42×10﹣11回答下列问题 1焙烧时发生的主要化学反应方程式为． 2分析下列图1图2图3氯化铵焙烧菱镁矿的最佳条件是 焙烧温度氯化铵与菱镁矿粉的质量之比为焙烧时间为． 3浸出液净化除杂过程如下首先加入MnO2Fe2+氧化为Fe3+反应的离子方程式为．然后调节溶液pH使Fe3+A13+沉淀完全此时溶液的pH范围围为．再加入NH4F沉淀Ca2+Mg2+．当cCa2+＝1.0×10﹣5mo1•L﹣1时cMg2+＝mo1•L﹣1 4碳化结晶时发生反应的离子方程式为．5流程中能循环利用的固态物质是．

列方程求x的值． 有两桶油第一桶油有24千克如果从第二桶中取出2千克放入第一桶中这时两桶油的重量相等第二桶有多少千克

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

用小正方体搭建一个几何体从上面看到的图形是从左面看到的图形是搭建这个几何体最少要个小正方体最多要小正方体．

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

推拉窗户是旋转现象．判断对错

用NA表示阿伏伽德罗常数的值下列说法正确的是

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

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

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．

2019年是元素周期表诞生的第150周年联合国大会宣布2019年是国际化学元素周期表年．WXY和Z为原子序数依次增大的四种短周期主族元素．W的一种核素可用于文物年代的测定X与W同周期相邻四种元素中只有Y为金属元素Z的单质为黄绿色气体．下列叙述正确的是

计算能简算的要简算． 72×156﹣56×72 85×+15×75% 80%×0.25﹣60%÷4 1﹣×÷

求出下面图形的周长和面积．单位厘米π＝3.14

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．

黄色超氧化钾KO2可作为宇宙飞船舱的氧源．某学习小组设计以下实验探究KO2的性质请回答相关问题 Ⅰ．探究KO2与水的反应 Ⅱ．探究KO2与SO2的反应 4正确的操作依次是． ①打开K1通入N2排尽装置内原气体后关闭 ②拆卸装置至实验完成 ③检查装置气密性然后装入药品 ④打开分液漏斗活塞K2 5A装置发生的化学方程式为． 6用上述装置验证KO2与SO2反应生成O2还存在不足你的改进措施是． 7改进后再实验待KO2完全反应后将装置C中固体加水溶解配成50.00mL溶液等分为MN两份． ①向M溶液中加入足量的盐酸酸化的BaCl2溶液充分反应后将沉淀过滤洗涤称重为2.33g． ②将N溶液移入填仪器名称中用0.40mol/L酸性KMnO4溶液滴定终点时消耗酸性KMnO4溶液20.00mL． ③依据上述现象和数据请写出该实验总反应的化学方程式．

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

IfIruledtheworldIwouldtheworldeverythingthatisbad. A.getridofby B.beridofby  C.ridof D.getridof

下列关于真核生物基因表达的叙述正确的是

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

实验能力和创新意识是化学学科核心素养的重要内容之一．某研究性学习小组在验证反应Fe+2Ag+＝Fe2++2Ag的实验中检测到Fe3+．发现和探究过程如下向硝酸酸化的0.05mo1•L﹣1硝酸银溶液pH≈2中加入过量铁粉搅拌后静置烧杯底部有黑色固体溶液呈黄色． 1检验产物 ①检验上层清液中所含离子的方法取上层清液滴加产生蓝色沉淀说明溶液中含有Fe2+． ②经检验黑色固体为Ag检验方法取出少量黑色固体洗涤后加入适量稀硝酸使固体溶解再滴加填试剂产生填现象． 2针对溶液呈黄色甲认为溶液中有Fe3+乙认为铁粉过量时不可能有Fe3+乙依据的原理是．用离子方程式表示o 针对这两种观点继续实验取上层清液滴加KSCN溶液溶液变红证实了甲的猜测．同时发现有白色沉淀产生且溶液颜色深浅沉淀量多少与取样时间有关对比实验记录如下 资料Ag+与SCN﹣生成白色沉淀AgSCN 3实验中溶液变为红色的离子方程式为产生白色沉淀说明存在填离子符号． 4对Fe3+产生的原因做如下假设 假设a可能是铁粉表两有氧化层能产生Fe4+假设b空气中存在O2发生反应4Fe2+O2+4H+＝4Fe3++2H2O产生Fe3+假设c酸性溶液中的NO3﹣将Fe2+氧化为Fe3+ 假设d溶液存在Ag+将将Fe2+氧化为Fe3+ 下述实验可证实假设abc不是产生Fe3+的主要原并可证实假设d成立． ①实验向硝酸酸化的溶液pH≈2中加入过量铁粉搅拌后静置不同时间取上层清液滴加KSCN溶液．3min时溶液呈浅红色30min后溶液儿乎无色． ②实验Ⅱ的现象说明发生了反应用离子方程式表示． 5实验Ⅱ中发生的反应可以用下列装置来验证．其中甲溶液是分别取电池工作前与工作一段时间后左侧烧杯中溶液同时滴加KSCN溶液前者或后者红色更深．

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

一个小数的小数点向右移动两位比原来的小数大了1.98原来这个小数是．

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

0既不是正数也不是负数．．判断对错

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

光气COCl2在塑料制药等工业生产中有许多用途其化学性质不稳定遇水迅速产生两种酸性气体．回答下列问题 1少量COCl2可用烧碱溶液吸收发生反应的离子方程式为． 2工业上用CO和Cl2在高温活性炭催化作用下合成光气 Cl2g+COg⇌COCl2g△H＝﹣108kJ•mol﹣1． 所需CO来自CH4与CO2的催化重整反应．查阅文献获得以下数据 CH4g+2O2g═CO2g+2H2Ol△H1＝﹣890.3kJ•mol﹣1 2H2g+O2g═2H2Ol△H2＝﹣571.6kJ•mol﹣1 2COg+O2g═2CO2g△H3＝﹣566kJ•mol﹣1 则CH4与CO2催化重整反应生成CO和H2的热化学方程式为． 3在T℃时向盛有活性炭的5L恒容密闭容器中加入0.6molCO和0.45molCl2CO和COCl2的浓度在不同时刻的变化状况如图所示 ①反应在第6min时的平衡常数为第8min时改变的条件是． ②在第12min时升高温度重新达到平衡时COCl2的体积分数将填增大不变或减小原因是． 4Burns和Dainton研究了反应Cl2g+COg⇌COCl2g的动力学获得其速率方程v＝k[cCl2]3/2[cCO]mk为速率常数只受温度影响m为CO的反应级数． ①该反应可认为经过以下反应历程 第一步Cl2⇌2Cl快速平衡 第二步Cl+CO⇌COCl快速平衡 第三步COCl+Cl2→COCl2+Cl慢反应 下列表述正确的是填标号． A．COCl属于反应的中间产物B．第一步和第二步的活化能较高 C．决定总反应快慢的是第三步D．第三步的有效碰撞频率较大 ②在某温度下进行实验测得各组分初浓度和反应初速度如表 CO的反应级数m＝当实验4进行到某时刻测得cCl2＝0.010mol•L﹣1则此时的反应速率v＝mol•L﹣1•s﹣1已知≈0.32．

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

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．

北京到武汉飞机票917元乘飞机大约元．

最新研究表明As2O3在医药领域有重要应用．某小组从工业废料中提取As2O3设计流程如图 已知H3AsO3为弱酸热稳定性差． 1写出一条碱浸时提高浸取率的方法碱浸中H3AsO3转化成Na3AsO3的 离子方程式为． 2氧化时常在向混合液中通入O2时对体系加压目的是． 3沉砷过程中有如下反应 ①CaOH2s⇌Ca2+aq+2OH﹣aq△H＜0 ②5Ca2++OH﹣+3AsO43﹣⇌Ca5OHAsO43↓△H＞0 沉砷率与温度关系如图．沉砷最佳温度为高于85℃时沉砷率下降的原因是． 4还原过程中获得H3AsO3的化学反应方程式为 操作A为过滤滤液Ⅱ的主要成分是． 5若每步均完全反应氧化’’和还原时消耗相同条件下O2和SO2体积分别为xLyL则废水中nH3AsO3nH3AsO4＝写出含xy的计算式．

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

NowadayseveryoneisresponsibleforaharmonioussocietyinChina. A.makingup B.takingup  C.openingup D.buildingup

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．

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．

下列有关基因突变的叙述正确的是

CO2是造成全球气候变暖的主要气体同时也是一种来源丰富价格低廉的碳资源．中科院福建物构所谢奎及其团队利用电能将CO2高效转化为COCO和H2可生产优质燃料和多种化工产品实现碳资源的循环利用． 1已知反应过程中能量变化如表和曲线图1所示 反应③的△H3＝kJ/mol． COg+2H2g⇌CH3OHl△H4＝kJ/mol此反应中有利于提高H2平衡转化率的条件是填字母． A．高温低压B．低温__C．高温__D．低温低压 2在不同的电压下CO2H2O混合电解转化为COH2的电流效率如图2所示注电流效率＝×100% ①由图可知生成CO和H2有相互填促进抑制或无影响作用． ②用此法生产的CO和H2合成CH3OH为使CO和H2利用率最高电解时应控制电压在V左右选填515232530． 3在300℃时将0.60molCO1.40molH2充入4L密闭容器中在恒温恒容下发生反应COg+2H2g⇌CH3OHg△H＜0甲醇的物质的量浓度随时间的变化如图3所示 ①图中判断反应到达平衡状态的依据是． ②5min内H2的平均反应速率vH2＝mol/L•min． ③若在500℃条件下将1.00molCO0.50molH2和0.50molCH3OH充入容积为2L的密闭容器中此时反应将填字母． A．正反应方向反应B．逆反应方向反应C．达到平衡D．无法判断

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．

把一个圆柱体的木块截成两个圆柱体这两个圆柱体木块的表面积的和比原来圆柱体的表面积增加了一个底面积．判断对错

下列与生物学实验相关的叙述错误的是

平移的关键是要数清楚格子找到对应的点旋转的关键要确定好对应的线段或点的位置．判断对错

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

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

圆柱的底面直径可以和高相等．判断对错

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

妈妈今天挣了100元钱记为+100元爸爸今天花了50元应记为﹣50元．判断对错

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.

一个等腰三角形顶角的度数是底角的2倍底角是

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．

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.

一个圆锥与和它等底等高的圆柱体积相差60dm2这个圆锥的体积是dm3．

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

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.

RedroseswereherfavoriteshernameswasalsoRose.Andeveryyearherhusbandsentthemtiedwithprettybows.Theyearhediedtheroseswerestill1toherdoor. Eachyearhesentherrosesandthe2wouldalwayssayIloveyouevenmorethisyearthanlastyearonthisday.Myloveforyouwillalways3witheverypassingyear.Sheknewthiswasthelasttime4therosewouldappear.Herlovinghusbanddidnotknowthathewould5.healwayslikedtodothingsearly.Thenifhegottoobusy6wouldworkoutfine. Ayearwentbyanditwas7tolivewithouthermate.ThentheveryhourasonValentinesbeforethedoorbellrangandtherewererosessittingbyherdoor.Shebroughttheroses8callingthefloristshop.Theowneransweredandsheaskedhimifhewouldexplainwhywouldsomeonedothistoher9hersuchpain? IknowyourhusbandpassedawaymorethanayearagoTheownersaidIknewyou'd10andyouwouldwanttoknow.Theflowersyoureceivedtodaywere11inadvance.Youhusbandalwaysplannedaheadheleftnothingtochance. Shethankedhimand12thephonehertearsnowflowinghard.Herfingersshakingassheslowlyreachedto13thecard.Insidethecardshesawthathehadwrittenheranote.ThisiswhathewroteHellomyloveIknowit'sbeenayear14I'vebeengoneIhopeithasn'tbeentoohardforyoutoovercome.Iknowitmustbelonelyandthepainisvery15.forifitwastheotherwayIknowhowIwouldfeel.Theloveweshared16everythingsobeautifulinlife.Ilovedyoumorethanwordscansay. YouweremyfriendandloverIknowit'sonlybeenayear17pleasetrynottogrieve.Iwantyoutobehappy18whenyoushedyourtears.Thatiswhytheroseswillbesenttoyouforyears. Whenyougetthese19thinkofallthe20thatwehadtogetherandhowbothofuswereblessed.IhavealwayslovedyouandIknowIalwayswill.Myloveyoumustgoonyouhavesomelivingstill. 1A.passed B.shown C.presented D.delivered 2A.note B.message C.line D.information 3A.disappear B.decrease C.grow D.keep 4A.that B./ C.which D.what 5A.passby B.passaway C.passdown D.passon 6A.everything B.something C.nothing D.anything 7A.happy B.meaningful C.hard D.impossible 8A.in B.out C.along D.up 9A.curing B.healing C.causing D.killing 10A.ask B.wonder C.doubt D.telephone 11A.purchased B.grown C.planted D.designed 12A.pickedup B.turnedup C.heldup D.hungup 13A.buy B.get C.read D.write 14A.when B.that C.before D.since 15A.strong B.weak C.true D.real 16Amade B.bad C.let D.left 17A.so B.but C.though D.still 18A.even B.only C.merely D.just 19A.roses B.belongings C.congratulations D.remarks 20A.sadness B.disappointment C.happiness D.sufferings

怎样算简便就怎样算 +﹣×24 +×24 24×× 36×++

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.

已知函数fx＝alnx+x2﹣1+axx＞0其中a为实数． 1求函数fx的单调区间 2若函数fx≥0对定义域内的任意x恒成立求实数a的取值范围 3证明+++＞对任意的正整数mn成立．

﹣Doyouregretupyouropinionthateverychildshouldtakepartinservicelearning? ﹣No.OnthecontraryIthinkitisverynecessary. A.bringing B.tobring  C.tobebrought D.beingbrought

﹣WhatdoyouthinkofourmanagerMrSmith? ﹣Heisreallysuccessinhiscareerbutinawayheisfailureinhisfamily. A.a/ B.thethe C.aa D.//

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．

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

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．

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.

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

一种三室微生物燃料电池污水净化系统原理如图所示图中有机废水中有机物可用C6H10O5表示．下列有关说法正确的是

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