(1分)﹣We all know from young that the Prime Minister Qinhui in the Song Dynasty framed up General Yuefei to death. ﹣Yes.　 　.(　　) A.A bad beginning makes a bad ending.  B.A guilty conscience is a self﹣accuser.  C.A bad thing never dies.  D.A man is known by the company he keeps.

已知某公司生产的一种产品的质量X单位千克服从正态分布N9064．现从该产品的生产线上随机抽取10000件产品其中质量在区间82106内的产品估计有附若X﹣Nuσ2则Pu﹣σ＜X＜μ+σ≈0.6826Pu﹣2σ＜X＜u+2σ≈0.9544．

若函数fx+gx和fx•gx同时在x＝t处取得极小值则称fx和gx为一对Pt函数． 1试判断fx＝x与gx＝x2+ax+b是否是一对P1函数 2若fx＝ex与gx＝x2+ax+1是一对Pt函数． ①求a和t的值 ②若a＜0若对于任意x∈[1+∞恒有fx+gx＜m⋅fxgx求实数m的取值范围．

已知函数fx＝﹣|x﹣a|+agx＝x2﹣4x+3若方程fx＝|gx|恰有2个不同的实数根则实数a的取值范围是

设p|x﹣|＜q2x≥1则p是q的

已知xy满足|x﹣1|+1≤y≤x+7．则z＝|3x﹣4y﹣5|的最大值为．

已知两条不重合的直线mn两个不重合的平面αβ有下列四个命题 ①若m∥nm⊂α则n∥α ②若n⊥αm⊥β且m∥n则α∥β ③若m⊂αn⊂αm∥βn∥B则α∥β ④若α⊥βα∩β＝m且n⊂βn⊥m则n⊥α 其中所有正确命题的序号为

在△ABC中角ABC所对边长分别为abc且bsin2C＝csinB． Ⅰ求角C Ⅱ若求sinA的值．

已知函数fx＝2sinωx+φ﹣1ω＞0|φ|＜π的一个零点是是y＝fx的图象的一条对称轴则ω取最小值时fx的单调增区间是

在平面直角坐标系xOy中已知点AF分别为椭圆的右顶点和右焦点过坐标原点O的直线交椭圆C于PQ两点线段AP的中点为M若QFM三点共线则椭圆C的离心率为．

Positivethinkersadmitwhentheyfeelfrustratedordepressedtheydon'tignoreit.Buttheydon'tblamethemselveseither.36Theycounter反击themwithmorepositiveones. Sohowdoyoustaypositivemaintainmotivatedandsustainhealthybehaviors?Herearesometips Lookforagoodrolemodel.Thereisalwayssomeonewhoseemstobedoingjustwhatyouwanttobedoing.Maybethey'vescheduledexerciseintotheirworkdayandswitchedfromcoffeetogreentea.37Askthemhowtheykeephealthyandfollowtheirfootsteps. 38Takeaminutetogiveyourselfanegoboost自我吹捧.Repeatsomemotivationalwordsoutloudtoyourself.NegativetalksuchasIcan'tdoit.I'mfat.isdangerousforyourwell﹣beingandhealthygoals.Trytoavoidthenegativeself﹣talkbeforeitharmsyou.Remindyourselfthatyoudeservehappinessandcanmakepositivechanges. Getsupport.Tellyourfriendsandfamilyaboutyourhealthyhabits.Ithelpstohaveanencouragingnetwork. Rewardyourself.39TakeanicebathgetamassageandenjoyanewDVDorCD. Haveaplan.Makingaplantoexerciseoreathealthyluncheswithafriendcanmeanthedifferenceofstickingwithyourgoalsorfallingoffrack.Ifyou'veplannedforanactivityyou'lllikestickwithit.Youmayevenfindthatwritingdownyourgoalsandstepstoachievethemcanhelpyoustayontrack.Takeitdaybydayorweekbyweek.40 A.Trysomepositiveself﹣talkandavoidnegativetalk. B.Staywithyourparentsandrelativesandyoucanavoidfrustrationordepression. C.Treatyourselftosomethingforyourhealthyefforts. D.Theytrytounderstandthenegativethoughtsandfeelingsinstead. E.Learnfromasuccessfulfriendfamilymemberorcolleague. F.Theprocessofwritingdownyourpersonalactionplanisagoodwaytowatchyourprogressorfailures. G.Believeinyourselfanddoasothersdo.

已知双曲线a＞0b＞0的左焦点为F右顶点为E过点F且垂直于x轴的直线与双曲线交于AB两点•＝0则该双曲线的离心率e为

在△ABC中内角ABC的对边分别为abc已知． Ⅰ求角C Ⅱ若AD是BC上的中线延长AD至点E使得DE＝2AD＝2求EC两点的距离．

IwanttogotoJapanbutIdon'thavemuchm.

某车间每天能生产甲种零件500只或者乙种零件600只或者丙种零件750只甲乙丙三种零件各一只配成一套现要在30天内生产最多的成套产品问甲乙丙三种零件各应生产多少天

如图四棱锥F﹣ABCD中底面ABCD为边长是2的正方形EG分别是CDAF的中点AF＝4∠FAE＝∠BAE且二面角F﹣AE﹣B的大小为90°． 1求证AE⊥BG 2求二面角B﹣AF﹣E的余弦值．

已知fx＝|x﹣1|． 1求函数gx＝fx﹣2|x+1|的最大值为M 2在第1问的条件下设m＞0n＞0且满足求证fm+2+f2n≥2．

学校组织学生参加社会调查某小组共有3名男同学4名女同学现从该小组中选出3名同学分别到甲乙丙三地进行社会调查若选出的同学中男女均有则不同的安排方法有

我国明代伟大数学家程大位在算法统综中常以诗歌的形式呈现数学问题其中有一首竹筒容米问题家有九节竹一茎为因盛米不均平下头三节三升九上梢四节贮三升唯有中间两节竹要将米数次第盛若有先生能算法也教算得到天明意思是九节竹的盛米容积成等差数列其中的三升九指3.9升则九节竹的中间一节的盛米容积为

已知数列{an}的前n项和为Sn且满足a2＝42Sn＝n+1ann∈N*． Ⅰ求数列{an}的通项公式 Ⅱ设bn＝求数列{bn}的前n项和Tn．

以平面直角坐标系的原点为极点x轴的正半轴为极轴建立极坐标系两种坐标系中取相同的长度单位．已知直线l的参数方程是t为参数圆C的极坐标方程是ρ＝4cosθ则直线l被圆C截得的弦长为．

已知椭圆C+＝1a＞b＞0的左右焦点分别为F1F2AB为椭圆C上位于x轴同侧的两点△AF1F2的周长为6∠F1AF2的最大值为． Ⅰ求椭圆C的方程 Ⅱ若∠AF1F2+∠BF2F1＝π求四边形AF1F2B面积的取值范围．

Expertssaythatfeeling61sleeparoundtwoorthreeo'clockintheafternoonisquitecommonandaquicksleepduringthedayisgoodforyouandthatyourworkwillimprove62aresult. ResearchersfromJapan'sCentreforMentalHealthstudiedthesleeping63habitof24workers.Twelveluckyworkers64telltotakeanapintheafternoonand65othertwelvehadtocontinueworking.Theresearchersthendidsometestsonalltheworkerstofindouthowefficienttheywere.Theresultsshowedthatthepeoplewhohadbeenallowed66takeanapscoredabout10percent67highontheteststhanthosewhohadnotbeenallowedanysleepatall.Theresearcherscontinuedwiththeirtestsforseveralhours68discoveredthatthesleepersstillperformedbetterinthetests69dotwoorthreehourslater. Sothenexttimeyoufeeltiredinclassandwanttotakeanapjust70explaintoyourteacherthatyouwillgetmuchmaredonewhenyouwakeup.

已知棱长都为2的正三棱柱ABC﹣A1B1C1的直观图如图若正三棱柱ABC﹣A1B1C1绕着它的一条侧棱AA1所在直线旋转则它的侧视图可以为

已知且共线则向量在方向上的投影为．

计算-3x2yz32

如图在矩形OABC与扇形OCD拼接而成的平面图形中OA＝3AB＝5∠COD＝点E在上F在AB上∠EOF＝设∠AOF＝x则当平面区域OECBF阴影部份的面积取到最大值时cosx＝．

ChooseYourVIRGINIA GrandCavernsisAmerica'sOldestShowcavebeautifulandmassiveformations.Uniontroopsvisitedthecaverns.ThomasJeffersonvisited﹣youshouldtoo!OpenweekendsinMarchdailyApril﹣October.9a.m﹣5p.m.Hourtoursleaveevery30minutes.703/249﹣5705. RockHouseMuseum.TakeajourneythroughhistorywithavisittotheexcitingmuseumandhistoricsitesofWytheville.TheRockHouseMuseumoffersglimpsesintodailylifeinthe19thcentury.Themuseumispartofthe50structuresfeaturedinWytheville'sHistoricWalkingTour.540/223﹣3330. TheNewseuminArlington.theworld'sonlyinteractivemuseumofnews.Visitorscanbereportersortelevisionnewscastersseetoday'snewsasithappensonablock﹣longvideonewswallandbetakenbehindthescenestoseehownewsismade.TheNewseumisopenWednesdaythroughSundayfrom10a.m.﹣5p.m. KenmorePlantation&GardensvisitovertwohundredyearsofhistoryfromtheRevolutionaryWarCivilWarandintothe21stCentury.HomeofBettyWashingtonGeorgeWashington'sonlysisterandPatriotCol.FieldingLewis.Explorethishistoricbuildingandcityblockofrestoredgardens.540/373﹣3381. VirginiaBeachoffers11000hotel/motelroomspluscottagesandcampgrounds.Enjoymilesofcleanbeachesandavarietyoffamilyattractions.Finerestaurantsvariousshoppingareasexcitingnightlifeandspecialeventsareofferedthroughouttheyear.800/822﹣3224. 21.WhencanyouvisitAmerica'sOldestShowcaveinJuly? A.Anyday. B.Onlyonweekends. C.Anydayexceptweekends. D.WednesdaythroughSunday. 22.InwhatwayistheNewseumdifferentfromRockHouseMuseum? A.Itislarger. B.Itismoreexciting. C.Visitorscanactinit. D.Visitorscanseemoreinit. 23.Ifyouwanttoenjoyyourselfintheeveningyoumaygoto. A.theNewseum B.KenmorePlantation&Gardens C.GrandCaverns D.VirginiaBeach.

已知函数fx＝ex﹣1+lnx﹣mxm∈R的导函数为f′x． Ⅰ当m＝0时求f′x的最小值 Ⅱ若函数fx存在极值试比较emmemm的大小并说明理由．

设数列{an}的前n项和为Sn满足a1＝23Sn＝n+manm∈R． Ⅰ求m的值及{an}的通项公式 Ⅱ数列{bn}满足anbn＝n{bn}前n项和为Tn若存在n∈N*使得λ+Tn≥T2n成立求实数λ的最小值．

已知数列{an}前n项和为Sna1＝2且满足Sn＝+nn∈N*． Ⅰ求数列{an}的通项公式 Ⅱ设bn＝4n﹣2an+1求数列{bn}的前n项和Tn．

计算-x23-x6

已知复数z＝a∈R是纯虚数则a的值为

已知ab∈Ra＞b＞0是|a﹣1|＞|b﹣1|的

已知数列{an}的前n项和Sn满足Sn＝﹣an﹣n﹣1+2n为正整数 Ⅰ令bn＝2nan求证数列{bn}是等差数列并求数列{an}的通项公式 Ⅱ令Tn＝． ①化简Tn的表达式 ②证明Tn的最小值是1．

已知点Mxy到定点F10的距离和它到直线x＝4的距离比是． 1求点M的轨迹Q的方程 2过点S40作直线l与轨迹Q相交于AB两点BC垂直于x轴且交轨迹Q于点C问直线AC是否过定点若是求出该定点的坐标若不是请说明理由．

某服装厂专门安排210名工人进行手工衬衣的缝制每件衬衣由2个衣袖1个衣身1个衣领组成如果每人每天能够缝制衣袖10个或衣身15个或衣领12个那么应该安排名工人缝制衣袖才能使每天缝制出的衣袖衣身衣领正好配套．

函数的部分图象大致为

已知函数fx＝|x+6|﹣|m﹣x|m∈R． I当m＝3时求不等式fx≥5的解集 II若不等式fx≤7对任意实数x恒成立求m的取值范围．

若lga+lgb＝0则的最小值是．

计算p7÷-p4

China'sfamedbikewarsmaysoonbefoughtonforeignshoresasBluegogoandMobikecompetewithfellowstand﹣freecyclehirecompanyofointheBritishmarket. Cyclehirestartupsso﹣calledbikeUbersarebigbusinessinChina.Around30companiescontroltensofthousandsofbikesinatleast35Chinesecities.ThetwolargestofoandMobikerecentlysecured﹩450millionand﹩300millioninfundingrespectively. AlreadylockedinabattleformarketshareacrossChinathestartupsnowhaveLondonintheirsights.ElsewhereintheUKthismonthBeijingBikelockTechnology'sbikehirebusinessofoislaunchingapilotbike﹣hiringschemeinCambridge.MobikeisreportedlyinterestedinlaunchingsimilarprojectsinBirminghamandManchester. TheSundayTimesrecentlyreportedBluegogoandMobikewerelookingatLondon. BothLondonandBirminghamalreadyhavebike﹣hireschemes.TheChineseservicesdifferindoingawaywithdockingstations.UsersofthebikesofferedbytheChinesecompaniesarefreetopickupacyclewherevertheyfindoneandleaveitwherevertheywantusingasmartphoneappandacodetodeactivateandactivate激活abuilt﹣inlock. Thecapital'stransportauthorityTransportforLondonhasexpressedinterestinthenewtechnology. TfL'sheadofstrategyandoutcomeplanningLilliMatsonsaidWearealwayskeentotalktocompaniestoexploreadvancementsintechnologyanddiscussnewideasandhavespokenwithanumberofcompaniestounderstandtheirplans. AspokespersonforofosaidWehavehadbriefdiscussionswithTfLabouthowourschemeworksinChinaandothermarketsandtheyareinterestedinhearinghowourtrialworksinCambridge.OurprimaryfocusisensuringtheCambridgetrialisasuccess.Wewillpotentiallylooktoenterotherareaslater. 32.Wherewillofolaunchtheirpilotbike﹣hiringplanintheUK? A.Birmingham B.Manchester C.Cambridge D.London 33.Whenyouwanttohireabikewhatshouldyouhaveinadvance? A.Anapp B.Asmartphone C.Acode D.Acycle 34.Fromthefourthparagraphweknowthat. A.BluegogoandMobikeweregoingtovisitLondon B.BluegogoandMobikewereplanningtoexpandthemarketinLondon C.BluegogoandMobikewerelookingforwardtoLondon D.BluegogoandMobikewerelaunchingbusinessinLondon 35.Whichmaybethebesttitleofthepassage? A.ChinesebikewarstobreakoutinUK B.ChinesebikebusinessinUK C.ChinesebikewartofightagainstUK D.ChinesebikeUbersinUK.

已知双曲线a＞0b＞0的一条渐近线为l圆Cx2+y﹣b2＝4与l交于第一象限AB两点若∠ACB＝且|OB|＝3|OA|其中O为坐标原点则双曲线的离心率为

在极坐标系中已知曲线C1的方程为ρ＝6sinθ曲线C2的方程为ρsinθ＝1．以极点O为原点极轴为x轴正半轴建立直角坐标系xOy． 1求曲线C1C2的直角坐标方程 2若曲线C2与y轴相交于点P与曲线C1相交于AB两点求的值．

已知实数xy满足则x的范围为的最大值为．

Thehospitalisinfofthehotel.

Doyouhaveabusinessbrain?Areyoualwayslookingforthenextbigidea?Maybelikemeyoumightfeelsettingupanewcompanyissomethingyoumightdowhenyou'reolderwhenyouhavemoreexperience.Butthat'snotalwaysthecase. Whilesomeofusmayfeelyoungadulthoodisatimeofuncertainlyfindingourplaceintheworldsleepinglateandpartyinghardothersarealreadyonapathtogreatbusinesssuccess.TakethefounderofMicrosoftBillGateswhostartedhiscompanyasayounguniversitystudentatHarvardintheUS.Therearemanyotherexamplesofyoungentrepreneurs企业家whohavebecomehugelysuccessfulprovingthatthere'snominimumagetobecomingtopdog. Buttobethenextbusinessexecutiverequireseffort.Youneedtoacquireakeenmindandgoodbusinessintelligenceandaboveallyouneedenthusiasm.Startinganewbusinesscomeswithanelementofriskbutifyouareabletospotthenextbigideait'sprobablyworthgivingitatry.JessicaRoseownsajewelrymakingbusinessandadmitsthatwhenIfirststartedIhadnobusinesstrainingbutwhenIwokeuponedayIthoughtI'dreallylovetobeajewelrydesigner.Shewentontobeasuccessfulyoungentrepreneur. Beingyoungandinbusinessdoeshaveitsdrawbacksyoumayworryyouhavenothingtobringtothetableandthatthepeoplewhoworkforyoutendtobeolderandwiser.That'swhatyoungBritishentrepreneurSulemanSacraniefound.Hestartedhisthirdbusinesswhilestudyingchemistryatuniversity.HesaysnowI'vegottwoadditionaldirectorswhohavegreyhairbutwhentheyfirststartedhesayshecouldtelltheywerethinkinginthebackoftheirheadsI'vegotakidsittinginfrontofme. Youmaythinksettingupanewstart﹣upiseasiersaidthandone.Aswellasideasyouneedfinancialbackingandexpertguidance.Butifyou'restudyinghardatuniversityanddon'thavethedesiretogointobusinessandmakeyourfortunekeeponstudying﹣aneducationispriceless! 29.Attheverybeginningwhat'stheauthor'sattitudetothenecessityofbeingagedandexperiencedinsettingupanewcompany? A.Supportive. B.Negative. C.Impersonal. D.Critical. 30.TheauthortakesJessicaRoseforexampleinordertoshowthat. A.doingbusinessneedsgreateffort B.enthusiasmismoreimportantthanakeenmind C.businesstrainingisnotnecessary D.itiseasytosetupanewbusiness 31.Whatcanbeinferredfromthelasttwoparagraphs? A.Olderdirectorsshouldn'tbeemployedifyouareyoung. B.Ageplaysanimportantroleinsettingupnewbusiness. C.Ifyoudon'tintendtosetupbusinessjustfocusonyourstudy. D.Educationismorevaluablethansettingupabusiness.

已知函数x＝lnx+ax+1a∈R I讨论函数fx的单调性 Ⅱ若函数fx的图象与x轴相切求证对于任意互不相等的正实数x1x2都有．

今年年初__在告台湾同胞书发表40周年纪念会上的讲话中说道我们要积极推进两岸经济合作制度化打造两岸共同市场为发展增动力为合作添活力壮大中华民族经济两岸要应通尽通提升经贸合作畅通基础设施联通能源资源互通行业标准共通可以率先实现金门马祖同福建沿海地区通水通电通气通桥．要推动两岸文化教育医疗卫生合作社会保障和公共资源共享支持两岸邻近或条件相当地区基本公共服务均等化普惠化便捷化某外贸企业积极响应__的号召在春节前夕特地从台湾进口优质大米向国内100家大型农贸市场提供货源据统计每家大型农贸市场的年平均销售量单位吨以[160180[180200[200220[220240[240260[260280[280300分组的频率分布直方图如图． 1求直方图中x的值和年平均销售量的众数和中位数 2在年平均销售量为[220240[240260[260280[280300的四组大型农贸市场中用分层抽样的方法抽取11家大型农贸市场求年平均销售量在[240260[260280[280300的农贸市场中应各抽取多少家 3在2的条件下再从这三组中抽取的农贸市场中随机抽取2家参加国台办的宣传交流活动求恰有1家在[240260组的概率．

Longinthe1700shomewasusedasaverbmeaningtobeguidedtoadestination.Sowhenyouhomeinonsomethingyougetclosertoyourtarget.ForexampleyoucouldsayPolicearehominginonthesuspects. Buttodayhomeismoreoftenusedasanoun.AndithasaveryemotionalconnectionforAmericanEnglishspeakers.YoucanrememberthemeaningofthewordbytheexpressionHomeiswheretheheartis.Thatexpressionmeanshomeisanywhereyoufeelloveandcomfort.Itisaplacewhereyoubelongandoftenaplaceyouconsideryourorigin.Youcanalsosimplycarrythefeelingofhomewithyou﹣﹣thatisafeelingofloveandloyaltytoyourfamilyandplacesthataredeartoyou. Inotherwordshomeisnotsimplyabuildingwhereyoulive﹣that'sahouse.Somepeoplefindthatreturningtoachildhoodplacebringsonlyjoyanddelight.WhenthesepeoplereturntotheirchildhoodhomestheymaysayHomeSweetHome! Ofcourseyoucansaythisanywhere.AsinglewomanlivingaloneinherfirstapartmentmaycomehomeafteratoughdayatworkandsighAhhomesweethome!IfshelovesherapartmentshemightalsosayThere'snoplacelikehome. Butwhataboutthosepeoplewhomuststayawayfromtheirhomesforalongtime?Theystillwanttofeelconnectedtoaplacetheycandependon.Hotelsknowthisabouttravelers.Manyadvertisethattheywillbeahomeawayfromhome.Thisexpressiondescribesaplacewhereeverythingisfamiliarandcomfortable. Friendscanalsogiveyouahomeawayfromhome.WhenyouvisitthemtheymaysaytoyouMakeyourselfathome!Thiscommonexpressionmeanssomeonewantsyoutofeelrelaxedandwelcome. 24.Whenthepolicesaytheyarehominginonthesuspectstheymean. A.theywillgotothesuspects'home B.theywillcatchthesuspectssoon C.theyaregoinghomewiththesuspects D.theyaregettingclosertothehome 25.WhatdoestheunderlinedworddearinPara2mean? A.precious B.expensive C.familiar D.favorite 26.Whydomanyhotelsadvertisethattheywillbeahomeforthetravelers? A.Toprovideahomeforthetravelers B.Tomakethetravelersbelievetheyhaveahome C.Toconvincethetravelersofhowcomfortabletheirhotelsare D.Todescribetheirhotelsmorevividly 27.Whenyouwanttomakesomeonefeelrelaxedandwelcomeyoucansay. A.Helpyourself B.Makeyourselfathome C.Justdoit D.Don'tbenervous.

已知△ABC是锐角三角形abc分别是ABC的对边．若A＝2B则的取值范围是

在10件产品中有3件一等品4件二等品3件三等品．从这10件产品中任取3件求 I取出的3件产品中一等品件数X的分布列和数学期望 II取出的3件产品中一等品件数多于二等品件数的概率．

在如图所示的计算1+5+9++2017程序框图中判断框内应填入的条件是

已知k≥﹣1实数xy满足约束条件且的最小值为k则k的值为．

已知定义域为R的奇函数fx若fx＝则f的值．

设向量＝12＝﹣2λ若与共线则•＝．

已知函数的最大值是6则实数m＝函数fx的单调减区间是．

Heiskindoffunnybecausehealwayswearsapairoffunnyg.

某汽车制造厂接受了在预定期限内生产一批汽车的任务如果每天生产35辆则差10辆才能完成任务如果每天生产40辆则可超额生产20辆若设预定期限是x天计划生产y辆汽车依题意可列方程组

Youmightnotrealizejusthowmuchworkgoesintomakinganewspaper.Apartfromsearchingforagoodstoryandtheendlesseditingrequiredtocorrectmistakescopyeditorsneedtomakesurethateverythingfitsperfectly.Agoodheadlinetellsasmuchaspossibleinashortspace.Thereneverseemstobequiteenoughspacetoexpresscompletelywhatyouwanttosay. Newsheadlinesoftenfocusonthecentralandmostimportantnewinformation.Therelevantlyinsignificantinformationmightbeleftoutinordertostressthemainideaorjusttobebrief.Newsheadlinesarefeaturedbythevividlanguage.Theyaddsomethingspecialtoattractreaders'eyes.Becausetheheadlineaimstodescribethemainfocusofthestoryinsixorsevenwordseverywordcountsandaccuracyisdecisive.Forinstancestab刺杀isabetterverbthankillbecauseittellsthereaderhowthecriminaldidhisdeedsimilarlyToyotaisabetternounthancar.Butthemakeofagoodheadlineisnotcharacterizednecessarilybytheamountofinformationinit.Forinstancethefront﹣pageheadlineontheLosAngelesTimesonSeptember11﹣thedayNewYork'sWorldTradeCenterwasattacked﹣simplyreadTERRORSTRIKESallincapitals.Whilethesetwowordsdonotdescribehowwhereorwhythebuildingswereattackedtheywereaccompaniedbyahalf﹣pagephotothatcaptured捕捉theeventinwhicharound3000peoplelosttheirlives. 1Whatisvitalinmakingnewsbesidesagoodstoryandperfectedition? A.Anappropriateheadline B.Acapitalheadline C.Vividlanguage D.Abriefreport 2Newheadlinesshouldbe. A.attractive B.countable C.insignificant D.longenough 3Theunderlinedwordtheyinthelastparagraphrefersto. A.thebuildings B.thetwowords C.thepeople D.thetwintowers 4TheexampleofTERRORSTRIKESisusedtosupporttheviewthat. A.agoodheadlinetellsasmuchaspossibleinashortspace B.newsheadingoftenfocusonthecentralandmostimportantnewsinformation C.agoodheadlineisnotmarkednecessarilybytheamountofinformationinit D.newsheadlinesarefeaturedbythevividlanguage

假定你是李华.你们班的外教Smith先生即将回国.你将代表全班在欢送会上发言.请你用英文发言稿内容包括 1.赞扬Smith的人品和工作. 2.感谢他在学习和生活中给予的帮助. 3.表达对Smith的祝福. 注意1.词数100左右.发言稿的开头已给出不计入总词数. 2.可适当增加细节使行文连贯. DearMr.Smith It'shardtosaygoodbye.Wordscannotconveyourendlessloveandthankstoyouforyou'vedonesomuchforusintheseyears. .

△ABC中AB＝5AC＝40＜λ＜1且则的最小值等于

已知函数fx＝ex+e﹣x则下列结论正确的是

图是函数y＝Asinωx+φx∈R在区间上的图象为了得到这个函数的图象只要将y＝sinxx∈R的图象上所有的点

在直角坐标系xOy中抛物线Cy2＝4x的焦点为F准线为lP为C上一点PQ垂直l于点QMN分别为PQPF的中点直线MN与x轴交于点R若∠NFR＝60°则NR＝

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错误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的词. 注意1.每处错误及其修改均限一词2.只允许修改10处多者从第11处起不计分. Ialwaysdreamlifeinthefuture.Whatwillitbelike? Perhapssomepeoplewillgotothemoonfortheholidaysandsomepeoplemayliveundertheseaandinpace.Besidesprobablythere'llbemoreeducationalprogramontheInternet.Andthereforestudentswillbeabletostudyathomeinsteadofgotoschooleveryday.What'smoremaybeinthefutureeachfamilywillhavearobotthatwillbeabletodowhateveritwastoldtosuchasgoingtoshoppingdoinghouseworkandsoon. WiththebreakthroughoftechnologyIbelievethattheirlifewillcertainlybecomeeasierhappyandmorecolorful.

如图1已知正方体ABCD﹣A1B1C1D1的棱长为2P为棱AA1的中点MNQ分别是线段A1D1CC1A1B1上的点若三棱锥P﹣MNQ的俯视图如图2则三棱锥P﹣MNQ的体积最大值为

已知数列{an}是等比数列数列{bn}是等差数列若b1+b6+b11＝7π则的值是

已知fx是定义在R上的偶函数且fx在0+∞内单调递减则

2019年某饮料公司计划从AB两款新配方饮料中选择一款进行新品推介现对这两款饮料进行市场调查让接受调查的受访者同时饮用这两种饮料并分别对AB两款饮料进行评分现对接受调查的100万名受访者的评分进行整理得到如下统计图．从对以往调查数据分析可以得出如下结论评分在[060的受访者中有20%会购买评分在[6080的受访者中有60%会购买评分在[801000]的受访者中有90%会购买． Ⅰ在受访的100万人中求对A款饮料评分在60分以下的人数单位万人 Ⅱ现从受访者中随机抽取1人进行调查试估计该受访者购买A款饮料的可能性高于购买B款饮料的可能性的概率 Ⅲ如果你是决策者新品推介你会主推哪一款饮料并说明你的理由．

WhenyouthinkofphotographingpeopleyoumaythinkofyourfamilyreunionortheChristmaspartyatwork.Thesetypesofpicturesofpeoplearerecordsoffuneventswithnicememories.Let'stakealookatanotherideafortakingpicturesofpeoplewithanentirelydifferentslant. Muchasanthropologists人类学家studythediversityofcharacteristicsofpeopleinculturalandenvironmentalcontextssomephotographersrecordtheseaspectsofpeopleintheirpictures.Theycrytocapturetheemotionsandhumanityofpeopleandthephotographdrawstheviewerintothesubject'sexperienceatthatmomentintime. Takingpicturesofpeoplewiththisgoalinmindmakesthephotographerandtheviewergrowintheunderstandingofhumannature.Forexampleaphotographofayoungmantryingtohitcharide搭便车intheraincanshowtheexperience.Hisponcho雨布sparkleswiththeraindropsflowinginasteadystreamtotheground.Thelightsofpassingtraffichighlightthecontrastbetweenthewarmdrydriverstakingnonoticeofhistrouble.Anotherpictureofachildsleepingonabenchatabusytrainstationcancapturetheinnocenceofchildhoodcontrastedwithabusyworldofhurriedgrown﹣ups. Ifyou'dliketoexperimentwiththisformofphotographsofpeoplelookforordinarypeopleincontrastingenvironmentsorcontexts.Childrenandtheelderlyposeextraordinarypossibilities.Thelinedfacesoftheagedoftenmakegreatsubjectsreflectingcharacterandwisdom.Peoplearesuchinterestingsubjects.Facialexpressionscanconveyathousandmoodsandfeelings. Takingpicturesofpeoplewithaneyetothefeelandmagicofthemomentwillmakeyouabetterandmoreenthusiasticphotographer.Youmayfindyourselfsotakenwiththisnewexperience.Photographingpeopleisanartfulendeavor.Taketheleap! 28.Thesecondparagraphmainlyshowsthatsomephotographersaredoingsomething. A.easierthananthropologists'study B.moreinterestingthananthropologists'study C.similartoanthropologists'study D.differentfromanthropologists'study 29.Whatistheeffectofpicturesthatshowemotionsandhumanityofpeople? A.Helpingtoknowmoreaboutcultures. B.Helpingtoknowbetterabouthumannature. C.Helpingtoknowmoreaboutphotography. D.Helpingtoknowbetteraboutanevent. 30.WhatdoestheunderlinedpartinParagraph3indicate? A.Thedrivershavetodrivecarefullyintherain. B.Thedriversareluckytobewarmanddryintherain. C.Theyoungmanisfightingagainsttherain. D.Theyoungmanisinadifficultsituationintherain. 31.Whatissuggestedbytheauthor? A.Takingpicturesofcommonpeople. B.Takingpicturesofgreatevents. C.Teachingchildrenphotographing. D.Applyingoldpeople'swisdomtophotographing.

已知F是椭圆的右焦点直线与C相交于MN两点则△MNF的面积为

设函数fx＝2|x﹣1|+|x+2|． Ⅰ求不等式fx≥4的解集 Ⅱ若不等式fx＜|m﹣2|的解集是非空集合求实数m的取值范围．

计算--2·-2-1

Somepeopledon'tliketogotothegym.Theydon'tliketogoforarunabikerideoraswim.Theydon'tliketothinkthey'reexercisingbecausetheythinkit'stoomuchlikehardwork.36 Thereareexercisesyoucandoathomethataregreatforburningcalories.37 ThefirstthingyoushoulddoisgetridofyourTVremotecontrol.Lockitupforawhile.Youwon'tneedit.InsteadofusingtheremotecontrolyouaregoingtophysicallygetupandwalkovertotheTVtochangethechannel.38Howmanytimesdoyouchangethechanneleveryday?Howmuchwalkingcouldyoudoifyoumanually用手操作changedthechannel?Youshouldn'tbewatchingmuchTVinthefirstplaceifyouwanttobelosingweightbutatleastmanuallychannelsurfingyouwillbeburningsomecalories. Secondlyyoucaneasilyburncalorieswhileyou'reonthephone.HowLongdoyouspendonthephoneeveryday?Perhapsanhourperhapstwoperhapsmore!39Youcan!Ifyouhaveacordlessphonethenwhiletalkingonthephoneyoucanbewalkingaroundthehousewalkingupthestairsordoinganyotherphysicalactivitythatwillcontributetoburningcalories. Thirdlylet'sgetoutofthehouseforamoment.40Gardeningisagreatcardiovascular心血管的activitythat'sgreatforburningcalories.Justwalkingaroundyourgardenplantingflowerstrimmingtreesandbushesdiggingupthegroundcancontributetoburningcaloriesandrememberitalladdsupsodowhateveryoucantolosethosecalories. A.Andthebestthingisyouwon'trealizethatyou'redoingit. B.Surelyitiswrongofyoutothinkthisway. C.Let'sgotothegardenanddosomegardening. D.Whatabouttalkinglessonthephone? E.Whatifduringthistimeyoucouldbeexercising? F.Areyouoneofthosepeople? G.Thismightsoundstupidbutthinkaboutit.

已知椭圆C＝1a＞b＞0的离心率为以椭圆长短轴四个端点为顶点的四边形的面积为4． Ⅰ求椭圆C的方程 Ⅱ如图所示记椭圆的左右顶点分别为AB当动点M在定直线x＝4上运动时直线AMBM分别交椭圆于PQ两点求四边形APBQ面积的最大值．

HuoZunisverypwiththeyoungstudents.

假定你是李华昨天一个外宾参观团来你校参观.他们走后你们在他们所待过的学校会议室里发现一个手提包并根据包内物品英文报纸英镑断定失主是他们其中一位.现由你写信给这次所结识的外宾参观团成员格林先生请他帮忙为你们找到失主并询问还包的方式. 注意1.词数100左右 2.可以适当增加细节以使行文连贯. .

把一块长方形的菜地分成大小不同的几部分其中甲占总面积的20%乙占总面积的丙是30平方米丙与甲的面积比是73求阴影部分的面积．

某公司计划购买1台机器该种机器使用三年后即被淘汰．在购进机器时可以一次性额外购买几次维修服务每次维修服务费用200元另外实际维修一次还需向维修人员支付小费小费每次50元．在机器使用期间如果维修次数超过购机时购买的维修服务次数则每维修一次需支付维修服务费用500元无需支付小费．现需决策在购买机器时应同时一次性购买几次维修服务为此搜集并整理了100台这种机器在三年使用期内的维修次数得下面统计表 记x表示1台机器在三年使用期内的维修次数y表示1台机器在维修上所需的费用单位元n表示购机的同时购买的维修服务次数． 1若n＝10求y与x的函数解析式 2若要求维修次数不大于n的频率不小于0.8求n的最小值 3假设这100台机器在购机的同时每台都购买10次维修服务或每台都购买11次维修服务分别计算这100台机器在维修上所需费用的平均数以此作为决策依据购买1台机器的同时应购买10次还是11次维修服务

己知函数若f[f0]＝2则实数a的值是．

在直角坐标系xOy中曲线C1的参数方程为α为参数．P是曲线C1上的动点将线段OP绕O点顺时针旋转90°得到线段OQ设点Q的轨迹为曲线C2．以坐标原点O为极点x轴正半轴为极轴建立极坐标系． Ⅰ求曲线C1C2的极坐标方程 Ⅱ在Ⅰ的条件下若射线与曲线C1C2分别交于AB两点除极点外且有定点M40求△MAB面积．

某校高一年级开设了丰富多彩的校本课程现从甲乙两个班随机抽取了5名学生校本课程的学分统计如表 用S12S22分别表示甲乙两班抽取的5名学生学分的方差计算两个班学分的方差S22＝并由此可判断成绩更稳定的班级是班．

已知函数fx＝1≤x≤2则函数gx＝2fx+fx2的值域为

1把下面梯形分成三个三角形使这三个三角形的面积的比是1232在下面方格纸的右边画一个面积为24cm²长方形它的长和宽的比为32

某花卉批发市场为丰富居民生活特举办花卉展销活动其中绿色观赏植物从AB两家经销商分别抽取10株进行展销经测量其株高如下单位cm A25374041221439194221 B21392942403818371927 ⅠAB哪家植物长得较高哪家植物长得比较整齐 Ⅱ市场决定从两家不低于40cm的植物中随机选取3株参加优质品种展销求3株中恰有2株选在A家的概率．

已知函数fx＝alnx﹣x2+2a﹣1x其中a∈R． Ⅰ当a＝1时求函数fx的单调区间 Ⅱ求函数fx的极值 Ⅲ若函数fx有两个不同的零点求a的取值范围．

已知集合A＝{x|x+1＞0}B＝{x|log2x＜1}则A∩B＝

2018年9月24日阿贝尔奖和菲尔兹奖双料得主英国著名数学家阿蒂亚爵士宣布自己证明了黎曼猜想这一事件引起了数学界的震动在1859年德国数学家黎曼向科学院提交了题目为论小于某值的素数个数的论文并提出了一个命题也就是著名的黎曼猜想．在此之前著名数学家欧拉也曾研究过这个问题并得到小于数字x的素数个数大约可以表示为nx的结论素数即质数lge≈0.43429．根据欧拉得出的结论如下流程图中若输入n的值为100则输出k的值应属于区间

如图为一块边长为2km的等边三角形地块ABC为响应国家号召现对这块地进行绿化改造计划从BC的中点D出发引出两条成60°角的线段DE和DF与AB和AC围成四边形区域AEDF在该区域内种上草坪其余区域修建成停车场设∠BDE＝α． 1当α＝60o时求绿化面积 2试求地块的绿化面积Sα的取值范围．

设数列{an}的各项均为正数a123a225an22n+1成等比数列bn＝1+1og2an数列{bn}的前n项和为Tn． 1求数列{an}的通项公式及{bn}的前n项和 2令cn＝设数列{cn}的前n项和为Sn求S2n．

在直角坐标系xOy中以坐标原点O为极点以x轴正半轴为极轴建立极坐标系直线l的极坐标方程为设点P是曲线上的动点求P到直线l距离的最大值．

如图所示四棱锥P﹣ABCD的底面是边长为2的正方形平面PAD⊥平面ABCDPA⊥AD∠PDA＝45° 1求证平面PAD⊥平面PCD 2设F为PC的中点问边AB上是否存在一点E使EF∥平面PAD并求此时点E到平面PCD的距离．

已知函数fx＝lnx+a∈R且a≠0gx＝b﹣1x﹣xex﹣b∈R Ⅰ讨论函数fx的单调性 Ⅱ当a＝1时若关于x的不等式fx+gx≤﹣2恒成立求实数b的取值范围．

已知△ABC的三边abc所对的角分别为ABC若a＞b且则A＝．

如图所示在△ABC中CE是边AB的中线O是CE的中点若＝＝则等于

阅读下面材料在空白处填入适当的内容1个单词或括号内单词的正确形式. ChinesepeopleoftenburytheashesoftheirlatelovedonestoshowrespectforthemonTombSweepingDaywhichnormally61fallonApril5everyyear.Itisadayforpeopletovisittheirancestor'stombsandhonorthemby62burnpaperofferings.Chinesepeopletraditionallybelievedthatsoulswillrestinpeace63theirbodiesarecoveredbysoilwhichwasconsideredmorerespectto64dead. Butattitudetowardsburialshaschanged.NowChineseare65increasingchoosingseaburialsinwhichashesaccompaniedwithflowerpetals花瓣arethrownintothesea.Oldpeopledonotcarehowthey66buryafterdeathwhattrulymattersto67theyisthehappinessoftheirchildren. Havinganenvironmentallyfriendlyburialhasbecomeimportantformanypeople.China'slatestpolicyonburialsencourageseco﹣burialsincludingseaandtreeburials68makeaharmoniousrelationshipbetweenhumans69nature.Eco﹣burialssavelandreducefuneralexpensesanddolessharm70theenvironment.

直线y＝m与直线y＝2x+3和曲线y＝ln2x分别相交于AB两点则|AB|的最小值为．

如图是一块木料的三视图将它经过切削打磨成半径最大的球则该木料最多加工出球的个数为

已知实数xy满足约束条件则z＝﹣2x+y的最小值为

已知函数fx＝lnx﹣axa为实常数． 1求函数fx的单调区间 2若a＞0求不等式的解集．