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已知椭圆C：（a＞b＞0）的离心率为，且经过点Q（2，） （1）求椭圆C的方程； （2）直线l与椭圆C相交于A，B两点，若|AB|＝4，求△AOB（O为坐标原点）面积的最大值及此时直线l的方程．...
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高二下学期数学《》真题及答案
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如图椭圆E.+=1a>b>0经过点A.0-1且离心率为.例21求椭圆E.的方程2经过点11且斜率为k
已知双曲线的离心率等于2且经过点M－23求双曲线的标准方程.
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在平面直角坐标系xOy中设椭圆与双曲线y2-3x2=3共焦点且经过点2则该椭圆的离心率为.
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12.5分Weoncehadapostercompetitioninourfifthgradeartclass. Youcouldwinprizesourteachertoldusasshewrotetheposterinformationontheblackboard.ShepassedoutsheetsofconstructionpaperwhilecontinuingThefirstprizeistendollars.Youjusthavetomakesurethatthewordsontheblackboardappearsomewhereonyourposter.'' Westudiedtheboardcritically.Someofuslookedwithoneeyeandheldupcertaincolorsagainsttheblackboardrockingthesheetstotherightorleftwhileweconjuredupourdesigns.Otherstwistedtheirhairaroundtheirfingersorchewedtheireraserswhiledeepinthought.Wehadplansforthatten﹣dollargrandprizeeachandeveryoneofus.I'mgoingtospendmineoncandiesonehopefulwouldannouncewhileanotherpracticedlookingseriouswiseandrich. Everyoneintheclassmadeaposter.Someofususedpartsofthosefancypapernapkinswhileothersusednothingbutcoloredconstructionpaper.Someofususedbigdesignsandsomeofuspreferredtogatherourarttidilydowninonecomerofourposterandletthespacedrawtheviewer'sattentiontoit.Someofuswouldwanderpastthegoodstudents'desksandthenreturntoourownprojectswithagrowingsenseofhopelessness.Itwasyetanothergrown﹣uptrickofthesorttheyseemedespeciallyfondofmakingallofusbelievewehadafairchanceandthenalways﹣﹣﹣always﹣﹣﹣rewardingthesameoldwinners. IbelieveIdrewasailboatbutIcan'tsaythatwithanycertainty.Imadeit.Iadmiredit.IdeterminedittobetheverybestofallofthepostersIhadseenandthenIturneditin. Minutespassed. NoonecamealongtogivemethegrandprizeandthensomeonedistractedmeandIprobablyneverwouldhavethoughtaboutthatposteragain. IwasstillsittingatmydeskthinkingWhatposter?whentheteachergavemeanenvelopewithaten﹣dollarbillinitandeveryoneintheclassapplaudedforme. 29.Whatwastheteacher'srequirementfortheposter? A.Itmustappearintime. B.Itmustbedoneinclass. C.Itmustbedoneonaconstructionsheet. D.Itmustincludethewordsontheblackboard. 30.Theunderlinedphraseinparagraph3mostprobablymeans. A.formedanideafor B.madeanoutlinefor C.madesomespacefor D.chosesomecolorsfor 31.Aftertheteacher'swordsallthestudentsintheclass. A.lookedveryserious B.thoughttheywouldberich C.begantothinkabouttheirdesigns D.begantoplaygames 32.Afterseeingthegoodstudents'designssomestudents. A.lovedtheirowndesignsmore B.thoughttheyhadafairchance C.puttheirowndesignsinacomer D.thoughttheywouldnotwintheprize 33.Wecaninferfromthepassagethattheauthor. A.enjoyedgrown﹣uptricksverymuch B.lovedpostercompetitionsverymuch C.feltsurprisedtowinthecompetition D.becamewiseandrichafterthecompetition.
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12.5分Thetwo﹣weeksummervacationendedyesterday.Kevinhadgonenowhereduringhisvacation.Hehadthemoneybuthehatedtotravelalone.HeusedtotakevacationswithGaryhisyoungestbrotherbuttheyhadabigargumentattheendoftheirlastvacation.Eachofthemhadspentthelastthreeyearswaitingfortheothertosaysorry. Kevindidnotfeelgoodaboutbeingonnon﹣speakingtermswithhisfavouritebrother.Buthewasnotgoingtoaskforforgivenesswheninhismindthiswholemisunderstandingwashisbrother'sfault. SoKevin'ssummervacationwasspentinhisownworld.HestayedinhisroomalldaytowatchTVorlayinbedtowatchtheceiling. Hediddoonethingnewanddifferentduringhisvacation.HewenttoanewcoffeeshopinFoothillStreet.Itserved25differentkindsofdeliciouscoffeeatreasonableprices. Theshopwasair﹣conditionedatacomfortabletemperature.Abouteightsmallroundtableswereinside.Outsidewerefourbiggertables.Eachhadfourwhitemetalchairsarounditandseveralbigumbrellasprovidedshade.Evenonhotafternoontherewasusuallyapleasantwind. Kevinvisitedthecoffeeshopfourtimesduringhisvacation.Healwayssatatatableoutsidebyhimselfandreadthefreedailypaper.Eachtimehewastherehereadmostofthenewspaperarticleswhileheenjoyedtwocupsofcoffee. Betweenarticleshetookbreaksbywatchingthetrafficnearbyandpeopleintooroutofstores.Kevinconsideredhisoutdoorsseattheperfectplaceforoneofhisfavouriteactivities…peoplewatching. Thecoffeeshopwithitsexcellentlocationandcoffeehadhelpedmakehisvacationapleasantone.Butheknewinhisheartifhisbrotherwastheretojoinhimjustonedayhisvacationwouldbeaperfectone. 24.Whatcanweinferfromthepassage? A.Kevin'sbrotherhadtraveledoutsidebyhimself. B.Kevinhadn'tgoneanywhereduringthisvacation. C.Kevinandhisbrotherbothhadstrongself﹣respect. D.GaryhadaskedKevintotraveltogetherbyKevinrefused. 25.Eachofthebrothersdidn'twanttosaysorrytotheotherfirstbecause. A.theyweretooshy B.theythoughttheotherwaswrong C.theyhadnotimetospeaktoeachother D.theydidn'twanttomakepeacewitheachother 26.WhatdoestheunderlinedwordworldinParagraph3referto? A.RoomB.HometownC.CoffeeshopD.Courtyard 27.WhatwastheKevin'srealpurposetogotothecoffeeshop? A.Totastethecoffee. B.Tokilltime. C.Toenjoythecool. D.Towatchpeople. 28.ThecoffeeshopwascomfortableandthecoffeewasdeliciousbutactuallyKevinfelt. A.ashamedB.nervousC.relaxedD.lonely.
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21分Anurseledatiredanxiousyoungmantothebedsideofanoldman.Shesaid10tothepatientYoursonishere.Shetriedtorepeatthewordsseveraltimes11thepatient'seyesopened.Hewaslyingquietlybecauseofthepainofhisheartattackandhewas12toseeclearlytheyoungmanstandingbesidethebed. He13hishandandtheyoungmantightlyputhisfingersarounditsendingamessageof14.Thenursebroughtachairnexttothebedside.Allthroughthenighttheyoungman15holdingtheoldman'shandandofferinggentlewordsofhope.Thedyingmansaidnothingasheheld16totheyoungman. Asdawnwascomingthepatientpassedaway.Theyoungmanplacedonthebedthelifeless17hehadbeenholdingandthenhewenttotellthenurseaboutit. Whilethenursedid18wasnecessarytheyoungman19.Whenshehadfinishedhertaskthenursebegantospeakgentlytotheyoungman. Buthestoppedher.Whowasthatman?heasked. The20nurserepliedIthoughthewasyourfather. Nohewasnotheanswered.I21sawhimbeforeinmylife.Icamehereonlytolookaftermyuncle. Then22didn'tyousayanythingwhenItookyoutohim?askedthenurse. HerepliedIknewheneededhis23andhissonjustwasn'there.Ialsoknewhowmuchheneededme… 10.A.rudely B.shyly C.softly D.coldly 11.A.but B.before C.though D.because 12.A.sure B.lucky C.likely D.unable 13.A.reachedout B.sentout C.carriedout D.leftout 14.A.disappointment B.anger C.success D.encouragement 15.A.walked B.moved C.jumped D.sat 16.A.tightly B.secretly C.curiously D.helpfully 17.A.foot B.head C.hand D.leg 18.A.what B.which C.that D.as 19.A.left B.waited C.escaped D.complained 20.A.delighted B.bored C.surprised D.disappointed 21.A.never B.often C.always D.frequently 22.A.how B.why C.where D.when 23.A.brother B.son C.wife D.daughter
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20分假设你是李华你的美国朋友Jack来信说他暑假期间要来中国交流学习.他学了两年中文但是仍然担心用中文交流时会遇到困难.请你用英语给Jack写封回信提几点建议1大胆自信2放慢语速3借助图画或肢体语言等表达方式. 注意1词数100词左右 2可适当加入细节使内容充实行文连贯 3短文开头和结尾己给出不计入总词数. DearJack Howiseverythinggoing? Bestwishes! Yours LiHua
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21分MysonJoeywasbornwithclubfeet.Thedoctorssaidthatwithtreatmenthewouldbeabletowalkbutwouldneverrunverywell.Thefirstthreeyearsofhislifewas10inhospital.Bythetimehewaseightyouwouldn'tknowhehasaproblemwhenyousawhim11. Childreninourneighborhoodalwaysranaround12theirplayandJoeywouldjumpandranandplay13.Wenevertoldhimthatheprobablywouldn'tbe14torunliketheotherchildren.Sohedidn'tknow. Inthe15gradehedecidedtojointheschoolrunningteam.Everydayhetrained.Heranmorethananyoftheothers16onlythetopsevenrunnerswouldbechosentorunforthe17.Wedidn'ttellhimheprobablywouldnevermaketheteamsohedidn'tknow. Heranfourtofivemileseveryday﹣evenwhenhehadafever.Iwas18soIwentto19himafterschool.Ifoundhimrunningalready.Iaskedhimhowhefelt.Okayhesaid.Hehadtwomoremilestogo.Yethelookedstraightaheadandkept20. Twoweekslaterthenamesoftheteam21wereannounced.Joeywasnumbersixonthelist.Joeyhad22theteam.Hewasintheseventhgrade﹣theothersixteammemberswerealleighthgraders.Wenevertoldhimhecouldn'tdoit…sohedidn'tknow.Hejust23it. 10.A.spent B.taken C.cost D.paid 11.A.talk B.sit C.study D.walk 12.A.after B.before C.during D.till 13.A.either B.too C.though D.yet 14.A.able B.sorry C.glad D.afraid 15.A.sixth B.seventh C.eighth D.ninth 16.A.so B.if C.then D.because 17.A.neighborhood B.family C.school D.grade 18.A.excited B.tired C.pleased D.worried 19.A.thinkabout B.hearfrom C.agreewith D.lookfor 20.A.riding B.walking C.playing D.running 21.A.jumpers B.runners C.doctors D.teachers 22.A.got B.kept C.made D.found 23.A.did B.had C.left D.took
1分Itrulybelievebeautycomesfromwithin. A.that B.where C.what D.why
20分假定你叫李津从学生英语报theStudents'EnglishNewspaper上看到招聘第十三届全运会thethirteenthNationalGames志愿者volunteer的广告.现用英语写封简短的应聘信介组自己的情况见下表表示愿意为全运会做一些工作请组委会考虑并尽早予以答复. 1.词数100词左右开头己给出不计入总词数. 2.可适当加入细节以使内容充实行文连贯. Dearsir IreadyouradintheStudents'EnglishNewspaperyesterday. Yours LiJin
12.5分ImagineaboyfromasmallvillageinEastAfricahasbeenlookingaftercattlefromaveryearlyage.Attheageoftwelveheknowsmoreaboutcattlethanmostofyou.Howeverhehasneverbeentoschool.Hasthisboyeverhadanyeducation? Educationisdiscoveringaboutourselvesandaboutthepeopleandthingsaroundus.Allthepeoplewhocareaboutus﹣ourparentsbrotherssistersfriends﹣areourteachers.Infactwelearnsomethingfromeveryonewemeet.Westartlearningonthedaywearebornnotonthefirstdaywegotoschool.Everydaywehavenewexperienceslikefindingabird'snestdiscoveringanewstreetinourneighborhoodandmakingfriendswithsomeonewedidn'tlikebefore.Newexperiencesareevenmorefunwhenwesharethemwithotherpeople. Encouragementfromthepeoplearoundusenablesustoexplorethingsasmuchaspossible.Aswegrowupwebegintofindoutwhatwecando.Youmightbegoodatcookingorsingingorplayingfootball.Youfindthisoutbydoingthesethings.Justthinkingaboutcookingdoesn'ttellyouifyouaregoodatit. Welearnsomuchjustbylivingfromdaytoday.Sowhyisschoolimportant? Ofcourseyoucanlearnsomethingsbetterathomethanatschoollikehowtodotheshoppingandhowtohelpoldordisabledpeoplewhocan'tdoeverythingforthemselves.Atschoolteachershelpustoreadandwrite.Withtheirguidancewebegintoseethingsindifferentways. 29.ThewritertakestheAfricanboyasanexampleto. A.introducethetopic B.adviseustovisithim C.tellaninterestingstory D.showhehasgoodschooleducation 30.Onecanfindoutwhatheisgoodatby. A.watchingthepeoplearound B.listeningtotheteacher C.thinkingwhattodo D.tryingandpracticing 31.Atschoolwecanlearnbetterhowto. A.shop B.cook C.readandwrite D.helpoldpeople 32.Accordingtothepassageschooleducation. A.isnotveryimportant B.givesuseverythingweneedinourlife C.cannotprepareusforourdailylife D.enablesustounderstandtheworldindifferentways 33.Whatisthepassagemainlyabout? A.Homeisnotimportant. B.Educationtakesplaceeverywhere. C.Africanchildrenneedn'tgotoschool. D.Onlythepeoplecaringforuscanteachus.
10分下面短文中有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词符号∧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. AcenturybeforeabirdcalledthepassengerpigeonlivedinNorthAmerica.Thereweresomanypassengerpigeonswhenpeopleoftensawthousandsevenmillionsofbirdsflyingoverhead.Thereforethereisnotasingleonelefttoday.Whathappened?Howdidallpassengerpigeonsdisappearfromtheearthentire? Thepassengerpigeonsbecomeextinctfortworeason.Firsttheforeststhatitlivedwascutdowntomakewaywithfarmsandcities.Secondmanypigeonswereshotandeatenbecausetheyweretoogoodtoeat.Atthattimetherewerenohuntinglawsprotectendangeredspeciesastheyarenow.
1分Weelectedhimheadofthefactory. A./ B.one C.the D.a
1分IlovetheweekendbecauseIgetupearlyonSaturdaysandSundays. A.needn't B.mustn't C.wouldn't D.shouldn't
10分Homeworkisagreatwayforkidstodevelopindependentlifelonglearningskillssoherearesomegeneralhomeworktipsforparents. ★Makesureyourchildhasaquietwell﹣litplacetodohomework. Avoidhavingyourchilddohomeworkwiththetelevisiononorinplaceswithotherdistractionssuchaspeoplecomingandgoing. ★Makesurethematerialsyourchildneedssuchassomepaperpencilsandadictionaryareavailable. Askyourchildifspecialmaterialswillbeneededforsomeprojectsandgettheminadvance. ★Helpyourchildwithtimemanagement. Establishasettimeeachdayfordoinghomework.Don'tletyourchildleavehomeworkuntiljustbeforebedtime.Thinkaboutusingaweekendmorningorafternoonforworkingonbigprojectsespeciallyiftheprojectinvolvesgettingtogetherwithclassmates. ★Bepositiveabouthomework Tellyourchildhowimportantschoolis.Theattitudeyouexpressabouthomeworkwillbetheattitudeyourchildacquires. ★Whenyourchildasksforhelpprovideguidancenotanswers. Givinganswersmeansyourchildwillnotlearnthematerial.Toomuchhelpteachesyourchildthatwhenthegoinggetsroughsomeonewilldotheworkforhimorher. Cooperationwiththeteacher.Itshowsyourchildthattheschoolandhomeareateam.Followthedirectionsgivenbytheteacher. ★Rewardprogressinhomework. Ifyourchildhasbeensuccessfulinhomeworkcompletionandisworkinghardcelebratethatsuccesswithaspecialevene.g.pizzaawalkatriptotheparktoreinforce加强thepositiveeffort.
如图所示为一个透明介质做成的直角三角柱的微截面其中∠A＝30°∠B＝90°一细光束平行于AC边从AB边的O点入射到该介质经AB边折射后直接照射在BC边上为使光束能从BC边射出三角柱求该透明介质材料折射率的范围．
1分Itwasearlyspringandthetreeswerejuststartingtotheirleaves. A.giveout B.turnout C.putout D.sendout
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