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已知在平面直角坐标系xOy中，直线l1的参数方程为，圆C的参数方程为． （1）求直线l1与圆C的两个交点的坐标； （2）已知动点P在圆C上，动点Q在直线l2：x﹣y﹣a＝0上，若线段PQ的最小值...
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高三下学期数学《》真题及答案
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在平面直角坐标系xOy中若直线l1:s为参数和直线l2:t为参数平行求常数a的值.
选修4﹣4坐标系与参数方程在直角坐标系xOy中直线l的参数方程为t为参数.在极坐标系与直角坐标系xO
己知在平面直角坐标系xOy中圆O的参数方程为α为参数.以原点O为极点以x轴的非负半轴为极轴的极坐标系
在平面直角坐标系xOy中已知直线l的参数方程为t为参数圆C.的参数方程为θ为参数.若点P.是圆C.上
选修4-4坐标系与参数方程在平面直角坐标系xoy中已知曲线C1x2+y2=1以平面直角坐标系xoy的
在平面直角坐标系xOy中直线l的参数方程为k为参数以原点O.为极点以x轴正半轴为极轴与直角坐标系xO
[选修4-4坐标系与参数方程]在直角坐标系xOy中直线l的参数方程为t为参数在极坐标系与直角坐标系x
已知极坐标系的极点在平面直角坐标系的原点O处极轴与x轴的非负半轴重合且长度单位相同若圆C的极坐标方程
在平面直角坐标系xOy中直线l的参数方程为t为参数.在极坐标系与直角坐标系xOy取相同的单位长度且以
在平面直角坐标系中以坐标原点为极点x轴的非负半轴为极轴建立坐标系.已知点A.的极坐标为直线l的极坐标
在平面直角坐标系xOy中已知直线l的参数方程为t为参数圆C.的参数方程为θ为参数.若点P.是圆C.上
在平面直角坐标系xOy中直线l的参数方程为t为参数.以坐标原点为极点x轴正半轴为极轴建立极坐标系圆C
在平面直角坐标系xoy中圆C.的参数方程为t为参数.在极坐标系与平面直角坐标系xoy取相同的长度单位
在直角坐标系xOy中直线l的参数方程为t为参数在极坐标系与直角坐标系xOy取相同的长度单位且以原点O
在直角坐标系xOy中直线l的参数方程为t为参数在极坐标系与直角坐标系xOy取相同的长度单位且以原点O
在平面直角坐标系中以坐标原点为极点x轴的正半轴为极轴建立极坐标系已知点A.的极坐标为直线l的极坐标方
选修4﹣4坐标系与参数方程在直角坐标系xOy中直线l的参数方程为t为参数.在极坐标系与直角坐标系xO
在平面直角坐标系中已知直线的参数方程是为参数以为极点轴正半轴为极轴的极坐标系中圆的极坐标方程为.Ⅰ写
已知直角坐标系xOy中直线l的参数方程为.以直角坐标系xOy中的原点O.为极点x轴的非负半轴为极轴圆
在平面直角坐标系xoy中已知直线l的参数方程为参数t∈R.同时在以坐标原点为极点x轴的正半轴为极轴建
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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. Ibecameinterestinginplayingfootballthankstoasmallaccident.OneafternoonwhereIwasinprimaryschoolIwaswalkingbytheschoolplayground.Suddenlyfootballfelljustinfrontofmebutalmosthitme.Istoppedtheballandkickedithardlybacktotheplayground.Toeveryone′ssurprisingtheballwentintothenet.AllthefootballplayerontheplaygroundcheeredloudlysaythatIhadatalentforfootball.FromnowonIstartedtoplaymyfootballwithclassmatesafterschool.Iamagoodplayernow.
二项式x﹣6展开式中的常数项为．
ForCanaanElementary'ssecondgradeinPatchogueN.Y.todayisspeechdayandrightnowit'sChrisPalaez'sturn.The8﹣year﹣oldisthejokeroftheclass.Withshiningdarkeyesheseemslikethekindofkidwhowouldenjoypublicspeaking.Buthe'snervous.'I'mheretotellyoutodaywhyyoushouldshould'Christripsonthe'﹣ld'apronunciationdifficultyformanynon﹣nativeEnglishspeakers.HisteacherThomasWhaleyisnexttohimwhisperingsupport.'Voteforme'ExceptforsomestumblesChrisisdoingamazinglywell.WhenhebringshisspeechtoaniceconclusionWhaleyinvitestherestoftheclasstopraisehim.AsonofimmigrantsChrisstartedlearningEnglishalittleoverthreeyearsago.Whaleyrecalls回想起howatthebeginningoftheyearwhencalledupontoreadChriswouldexcusehimselftogotothebathroom.LearningEnglishasasecondlanguagecanbeapainfulexperience.Whatyouneedisagreatteacherwholetsyoumakemistakes.'Ittakesalotforanystudent'Whaleyexplains'especiallyforastudentwhoislearningEnglishastheirnewlanguagetofeelconfidentenoughtosay‘Idon'tknowbutIwanttoknow.''Whaleygottheideaofthissecond﹣gradepresidentialcampaignprojectwhenheaskedthechildrenonedaytoraisetheirhandsiftheythoughttheycouldneverbeapresident.Theanswerbrokehisheart.Whaleysaystheprojectisaboutmorethanjustlearningtoreadandspeakinpublic.Hewantsthesekidstolearntoboast夸耀aboutthemselves.'Boastingaboutyourselfandyourbestqualities'Whaleysays'isverydifficultforachildwhocameintotheclassroomnotfeelingconfident.'1WhatmadeChrisnervous?A.Tellingastory.B.Makingaspeech.C.Takingatest.D.Answeringaquestion.2Whatdoestheunderlinedword'stumbles'inparagraph2referto?A.Improperpauses.B.Badmanners.C.Spellingmistakes.D.Sillyjokes.3WecaninferthatthepurposeofWhaley'sprojectisto.A.helpstudentsseetheirownstrengthsB.assessstudents'publicspeakingskillsC.preparestudentsfortheirfuturejobsD.inspirestudents'loveforpolitics4WhichofthefollowingbestdescribesWhaleyasateacher?A.Humorous.B.Ambitious.C.Caring.D.Demanding.
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某三棱锥的三视图如图所示网格纸上小正方形的边长为1三棱锥表面上的点M在俯视图上的对应点为A三棱锥表面上的点N在左视图上的对应点为B则线段MN的长度的最大值为
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Duringtherosyyearsofelementaryschool小学Ienjoyedsharingmydollsandjokeswhichallowedmetokeepmyhighsocialstatus.Iwasthequeenoftheplayground.Thencamemytweensandteensandmeangirlsandcoolkids.TheyroseintheranksnotbybeingfriendlybutbysmokingcigarettesbreakingrulesandplayingjokesonothersamongwhomIsoonfoundmyself.Popularityisawell﹣exploredsubjectinsocialpsychology.MitchPrinsteinaprofessorofclinicalpsychologysortsthepopularintotwocategories:thelikableandthestatusseekers.Thelikables'plays﹣well﹣with﹣othersqualitiesstrengthenschoolyardfriendshipsjump﹣startinterpersonalskillsandwhentappedearlyareemployedeverafterinlifeandwork.Thenthere'sthekindofpopularitythatappearsinadolescence:statusbornofpowerandevendishonorablebehavior.EnviableasthecoolkidsmayhaveseemedDr.Prinstein'sstudiesshowunpleasantconsequences.Thosewhowerehighestinstatusinhighschoolaswellasthoseleastlikedinelementaryschoolare'mostlikelytoengage从事indangerousandriskybehavior.'InonestudyDr.Prinsteinexaminedthetwotypesofpopularityin235adolescentsscoringtheleastlikedthemostlikedandthehighestinstatusbasedonstudentsurveys调查研究.'Wefoundthattheleastwell﹣likedteenshadbecomemoreaggressiveovertimetowardtheirclassmates.Butsohadthosewhowerehighinstatus.Itclearlyshowedthatwhilelikabilitycanleadtohealthyadjustmenthighstatushasjusttheoppositeeffectonus.'Dr.Prinsteinhasalsofoundthatthequalitiesthatmadetheneighborswantyouonaplaydate﹣sharingkindnessopenness﹣carryovertolateryearsandmakeyoubetterabletorelateandconnectwithothers.InanalyzinghisandotherresearchDr.Prinsteincametoanotherconclusion:Notonlyislikabilityrelatedtopositivelifeoutcomesbutitisalsoresponsibleforthoseoutcomestoo.'Beinglikedcreatesopportunitiesforlearningandfornewkindsoflifeexperiencesthathelpsomebodygainanadvantage'hesaid.1Whatsortofgirlwastheauthorinherearlyyearsofelementaryschool?A.Unkind.B.Lonely.C.Generous.D.Cool.2Whatisthesecondparagraphmainlyabout?A.Theclassificationofthepopular.B.Thecharacteristicsofadolescents.C.Theimportanceofinterpersonalskills.D.Thecausesofdishonorablebehavior.3WhatdidDr.Prinstein'sstudyfindaboutthemostlikedkids?A.Theyappearedtobeaggressive.B.Theytendedtobemoreadaptable.C.Theyenjoyedthehigheststatus.D.Theyperformedwellacademically.4Whatisthebesttitleforthetext?A.BeNice﹣YouWon'tFinishLastB.TheHighertheStatustheBetterC.BetheBest﹣YouCanMakeItD.MoreSelf﹣ControlLessAggressiveness
已知实数a＝2ln2b＝lnln2c＝ln22则abc的大小关系是
Everyyearabout40000peopleattempttoclimbKilimanjarothehighestmountaininAfrica.They1withthemlotsofwaste.The2mightdamagethebeautyoftheplace.Theglaciers冰川aredisappearingchangingthe3ofKilimanjaro. HearingthesestoriesI'm4abouttheplace﹣otherdestinationsaredescribedaspurernaturalexperiences. HoweverIsoon5thatmuchhaschangedsincethedaysofdisturbingreportsof6amongtonsofrubbish.Ifinda7mountainwithtoiletsatcampsandalongthepaths.Theenvironmentalchallengesare8buttheeffortsmadebytheTanzaniaNationalParkAuthorityseemtobe9. ThebestofaKilimanjaro10inmyopinionisn'treachingthetop.Mountainsare11asspiritualplacesbymanycultures.This12isespeciallyevidentonKilimanjaroas13gothroughfiveecosystems生态系统inthespaceofafewkilometers.Atthebaseisarainforest.Itendsabruptlyat3000meters14landsoflowgrowingplants.Furtheruptheweather15﹣lowcloudsenvelopethemountainsideswhicharecoveredwiththickgrass.I16twelveshadesofgreenfromwhereIstand.Above4000metersisthehighland17:gravel砾石stonesandrocks.18youclimbintoanarctic﹣likezonewith19snowandtheglaciersthatmaysoondisappear. DoesKilimanjaro20itsreputationasacrowdedmountainwithlinesoftouristsruiningtheatmosphereofpeace?Ifoundtheoppositetobetrue. 1A.keep B.mix C.connect D.bring 2A.stories B.buildings C.crowds D.reporters 3A.position B.age C.face D.name 4A.silent B.skeptical C.serious D.crazy 5A.discover B.argue C.decide D.advocate 6A.equipment B.grass C.camps D.stones 7A.remote B.quiet C.all D.clean 8A.new B.special C.significant D.necessary 9A.payingoff B.spreadingout C.blowingup D.fadingaway 10A.atmosphere B.experience C.experiment D.sight 11A.studied B.observed C.explored D.regarded 12A.view B.quality C.reason D.purpose 13A.scientists B.climbers C.locals D.officials 14A.holdingonto B.goingbackto C.livingupto D.givingwayto 15A.changes B.clears C.improves D.permits 16A.match B.imagine C.count D.add 17A.village B.desert C.road D.lake 18A.Obviously B.Easily C.Consequently D.Finally 19A.permanent B.little C.fresh D.artificial 20A.enjoy B.deserve C.save D.acquire
将函数的图象上各点横坐标缩短到原来的纵坐标不变得到函数gx的图象则下列说法正确的是
OnNovember11Alibabasoldmorethan210billionyuangoodsonitse﹣commerceplatformsTaobao.comandTMallmakingheadlinesallovertheworld. A.sumof B.valuefor C.worthof D.profitfor
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Anintroductiontothisbookisassuperfluousasacandleinfrontofapowerfulsearchlight.ButaconventionofpublishingseemstorequirethatthecandleshouldbethereandIamproudtobetheonetoholdit.AbouttenyearsagoIpickedupfromthepileofnewbooksonmydeskacopyofSonsandLoversbyamanofwhomIhadneverheardandIstartedtoracethroughitwiththeimmoralspeedoftheprofessionalreviewer.ButafterapageortwoIfoundmyselfreadingreallyreading.Herewas﹣hereis﹣amasterpieceinwhicheverysentencecountsabookpackedwithsignificantthoughtandbeautifularrestingphrasestheworkofaremarkablegeniuswhosegiftsaremorerichlyvariousthanthoseofanyotheryoungEnglishnovelist.ToappreciatetherichvarietyofMrLawrencewemustreadhislaternovelsandhisvolumesofpoetry.ButSonsandLoversrevealstherangeofhistypicalpower.Herearecombinedandblended混合的sortof'realism'andalmostlyric抒情的imageryandrhythm.Thespeechofthepeopleisthatofdailylifeandthethingsthathappentothemarenormaladventuresandaccidents;theyfallinlovemarryworkfailsucceedanddie.ButoftheirdeeperemotionsandoftherelationsoftheselittlehumanbeingstotheearthandtothestarsMrLawrencemakessomethingneartopoetryandprose散文withoutviolatingitsproper'otherharmony'.TakethemarvellousparagraphonnexttothelastpageofSonsandLoversMrLawrencedependssolittleonplotintheordinarysenseofthewordthatitisperfectlyfairtoreadtheendofhisbookfirst:Wherewashe?Onetinyuprightspeckoffleshlessthananearofwheatlostinthefield.Hecouldnotbearit.Oneverysidetheimmensedarksilenceseemedpressinghimsotinyasparkintoextinctionandyetalmostnothinghecouldnotbeextinct.Nightinwhicheverythingwaslostwentreachingoutbeyondstarsandsunstarsandsunafewbrightgrainswentspinningroundforterrorandholdingeachotherinembracethereinthedarknessthatoutpassedthemallandleftthemtinyanddaunted气馁.Somuchandhimselfinfinitesimalatthecoreanothingnessandyetnotnothing.Suchgloriouswritingliftsthebookfaraboveanovelwhichismerelyastory.Ibegthereadertoattendtoeverylineofitandnottomissasingleoneofthemanysentencesthatawaitandsurpriseyou.Someareenthusiasticandimpressiveliketheparagraphabove;othersarekeen'realistic'observationsofthingsandpeople.InoneofhisbooksMrLawrencemakesacharactersayorthinkthatlifeis'mixed'.Thatindicateshisphilosophyandhismethod.Heblendstheaccuratelyliteralandtrivial琐碎的withtheextremelypoetic.TofindasimilarblendingoftinydailydetailandwideimaginativevisionwemustgobacktotwooldernovelistsHardyandMeredith.IdonotmeanthatMrLawrencederives源于directlyfromthemorindeedthatheisclearlythedisciple弟子ofanymaster.Idofeelsimplythatheisoftheelderstature名望ofHardyandMeredithandIknowofnootheryoungnovelistwhoisquiteworthyoftheircompany.WhenIfirsttriedtoexpressthiscomparisonthisconnectionIwascontradictedbyafellowcriticwhopointedoutthatMeredithandHardyareentirelyunlikeeachotherandthatthereforeMrLawrencecannotresembleboth.Tobesurenothingismorehatefulthanforcedcomparisonsnothingmoreboringthantodiscoverparallelsbetweenoneworkofartandanother.Anartist'smasteryconsistsinhisdifferencefromothermasters.Buttoreferayoungmanofgeniustoanolderoneatthesametimepronouncinghisindependenceandoriginalityisafairifnotverysuperiormethodofpraisinghim.1Theunderlinedword'superfluous'inParagraph1isclosestinmeaningto.A.meaningfulB.unnecessaryC.fundamentalD.fashionable2WhatistypicalofLawrence'sworks?A.Theyequallyrevealhisgeniuspower.B.Theycontainlotsofgreatlyricpoetry.C.Theypresentsomereallivingsituations.D.Theyfocusonrelationsbetweenhumans.3WhatdoestheauthorwanttoillustratebyincludingoneparagraphfromSonsandLovers?A.Theplotofthenovelhaslittletodowithdailylife.B.ItiswisetoreadLawrence'sbooksfromtheend.C.Lawrenceisnotcapableoftellinggoodstories.D.ThelanguageinLawrence'sbooksiselegant.4WhowereHardyandMeredith?A.TheytaughtLawrenceliteraturewhenhewasyoung.B.TheyweretherealisticnovelistsofLawrence'stime.C.Theywerenovelistswhoresembleeachotherinwriting.D.Theywerenovelistscombiningdetailswithimagination.5Accordingtotheauthorwhatdoesanartist'smasterymean?A.Hemusthavepersonaldiversity.B.Hemusthavethecriticalspirits.C.Hemustbehappytobecompared.D.Hemustbeamanofgenius.6Whatistheauthor'spurposeinwritingthepassage?A.TointroduceLawrence'snovelSonsandLovers.B.Toshowhisexperiencesofreadingclassics.C.ToanalyzeLawrence'swritingcharacteristics.D.Tocomparethestylesofdifferentnovelists.
Regulatingacomplexnewtechnologyishardparticularlyifitisevolvingrapidly.WithautonomousvehiclesAVsjustaroundthecornerwhatcanpolicymakersdotoensurethattheyarrivesafelyandsmoothlyanddeliverontheirpromise?TheimmediategoalistomakesurethatAVsaresafewithoutpreventinginnovation.InAmericaexperimentalAVsareallowedontheroadinmanystatesaslongasthecompaniesoperatingthemacceptresponsibility.ChrisUrmsonofAurorasaysAmericanregulatorshavegotthingsrightworkingcloselywithAVfirmsandissuingguidelinesratherthanstrictrulesthatmightpreventtheprogressoftheindustry.'It'simportantthatwedon'tjumptoregulationbeforeweactuallyhavesomethingtoregulate.'hesays.OntheotherhandSingapore'sgovernmenthastakenthemosthandsonapproachtopreparingforAVssaysKarlIagnemmaofNutonomyanAVstartupthathastestedvehiclesinthecitystate.Forexampleithasintroduceda'drivingtest'thatAVsmustpassbeforetheycangoontheroad.Thisdoesnotguaranteesafetybutsetsaminimumstandard.ElsewhereregulatorshavepermittedlimitedtestingonpublicroadsbutwanttoseemoreevidencethatthevehiclesaresafebeforegoingfurthersaysTakaoAsamioftheRenaultissanMitsubishialliance联盟.'Simpleaccumulationofmileage里程willneverprovethatthevehicleissafe.'hesays.Insteadregulatorsaretalkingtocarmakersandtechnologyfirmstodevelopnewsafetystandards.MartenLevenstamheadofproductstrategyatVolvocomparestheprocesstothatofdevelopinganewdrug.Firstyoushowinthelaboratorythatitmightwork;thenyourunclinicaltrialsinwhichyoucarefullytestitssafetyandefficiency;andiftheyaresuccessfulyouaskforregulatoryapprovaltomakethedruggenerallyavailable.Similarlyautonomouscarsarecurrentlyattheclinicaltrialstagewithoutfinalapprovalasyet.Itisnotpossibletoprovethatanewdrugisentirelysafebuttheriskisworthtakingbecauseofthebenefitsthedrugprovides.ItwillbethesameforAVshesuggests.Afterallnowadayshumandrivenvehiclesarehardlyriskfree.1InChrisUrmson'sopinion.A.strictrulesarenecessaryintheprogressofAVsB.wemustregulateAVsbeforeproblemsoccurC.governmentsshouldtakeapproachestopreparingforAVsD.regulatorshadbettercooperatewithAVfirmsandissueguidelines2HowistheprocessofdevelopingnewsafetystandardsofAVsexplainedinthelastparagraph?A.Bygivingexamples.B.Bymakingcomparisons.C.Byanalyzingcauseandeffects.D.Bylistingstatistics.3WhatisMartenLevenstam'sattitudetowardsAVs?A.Positive.B.Negative.C.Neutral.D.Doubtful.
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故选Iwasholdingherhandwhenthemaninthewhitecoatcamein.1bothsetsofX﹣rayshesaidseriously:Herlungswerefillingupwithfluid液体.Thismeantthat2Iwouldneedtoconsultwithspecialistsandstopwhateverwas3intomymother'slungs. 4thisdoctorseemedtohaveanotherplan.Hebeganspeakingtomeaboutthequalityoflife.Hegavemealistofmymother's5andthenconcludedthattheyaddeduptothe6ofherlife.IhadheardthephraseWecanmakeher7toomanytimes.NowIwasmore8thanhurtwhendoctorswantedtokillmymother. Mymothercouldn'twalktalkorswallowafterherstrokebutnursingherwasnot9.WheneverIaskedherifherdiseasesweretoohardonhershejust10herhead.Shewasconveyingtomeherloveandunderstandingbeyond11.Andnotjusttome. Ayoungnursestoppedmejustbeforethedoctorappeared:YouknowI12mynewjobtoyourmother:She13metolearntodrivesoIwouldbenot14busesandIcouldgettothehospitaltowork. SoIcouldn'thelpquestioningthedoctor's15ofqualityoflife.Howdidhearriveatthe16thatmymothershoulddie?Washemakingan17calculationthattokeepabedridden卧床不起的personalivewascostly?Hecertainlydidnotcalculateherendlesslovethewayit18everyonewhocameincontactwithher.Ifhumanlifeis19tocost﹣benefitanalysesallformsofcaringforanyreasonotherthanself﹣interestwillbe20.Canwedobetter? 1A.Lookingup B.Holdingup C.Settingup D.Drawingup 2A.immediately B.occasionally C.eventually D.recently 3A.stealing B.marching C.rushing D.storming 4A.Therefore B.Moreover C.However D.Otherwise 5A.vices B.strengths C.sacrifices D.disabilities 6A.whole B.peak C.future D.end 7A.unbearable B.moveable C.unconscious D.comfortable 8A.relieved B.excited C.disappointed D.ashamed 9A.tiring B.easy C.casual D.pleasant 10A.nodded B.hung C.shook D.lifted 11A.reach B.words C.belief D.hope 12A.relate B.owe C.lose D.submit 13A.forced B.encouraged C.intended D.ordered 14A.atthemercyof B.atalossfor C.infavorof D.inchargeof 15A.framework B.instruction C.warning D.measure 16A.precise B.rough C.arithmetic D.economic 17Aconclusion B.agreement C.consensus D.answer 18A.transmitted B.transferred C.transformed D.transported 19A.admitted B.reduced C.sentenced D.committed 20A.included B.robbed C.excluded D.confirmed
某企业对设备进行升级改造现从设备改造前后生产的大量产品中各抽取了50件产品作为样本检测一项质量指标值该项质量指标值落在[2040内的产品视为合格品否则为不合格品．图1是设备改造前样本的频率分布直方图表1是设备改造后样本的频数分布表． 1请估计该企业在设备改造前的产品质量指标的平均值每组值用区间中点值代替 2企业将不合格品全部销毁后对合格品进行等级细分质量指标值落在[2530内的定为一等品每件售价420元质量指标值落在[2025或[3035内的定为二等品每件售价300元其它的合格品定为三等品每件售价180元根据表1的数据用该组样本中一等品二等品三等品各自在合格品中的频率代替从所有产品中抽到一件相应等级产品的概率．现有一名顾客随机购买两件产品设其支付的费用为X单位元求X的分布列和数学期望． 表1设备改造后样本的频数分布表．
请阅读下面短文并按照要求用英语写一篇150词左右的文章. Thehardworkingandnever﹣give﹣upattitudeofMalaysianbadmintonstarLeeChongWeihaswonmanypeople'shearts. The36﹣year﹣oldplayerisalreadyaveteranofthebadmintonworld.Despitethishedoesn'twanttocallitaday.Atthemomentnosecanceriskeepinghimoutofthegame. AtapressconferenceearlierthismonthLeesaidthathehopestoreturntobadmintonnextyearandtocompeteinhisfifthOlympicGamesheldinTokyoin2020.It'sgoingtobetoughtofightforthegoldmedalbutIwilltrymyverybestbecauseit'salwaysmydreamhesaid.AlthoughLeeisoneoftheworld'sgreatestplayershehasneverwonabadmintonworldchampionship.SoifhealthpermitshewillcontinuetocompetebecausehewantsanOlympicgold.Besideshisgreatdeterminationhisotherdriveishispassionforthesport.OneofthemostimportantthingsinlifetohimisbadmintonLee'scoachMisbunSodiktoldtheNewStraitsTimes. AftertwomonthsofcancertreatmentthatcausedeatingandsleepingproblemsrecentlyLeebeganalittletraining. 【写作内容】 1.用约30个单词概述上述信息的主要内容; 2.综合上述信息用约120个单词谈一谈热情对于一个人事业成功的重要性及其理由. 【写作要求】 1.写作过程中不能直接引用原文语句; 2.作文中不能出现真实姓名和学校名称; 3.不必写标题. 【评分标准】 内容完整语言规范语篇连贯词数适当.
已知函数fx＝ex﹣ax﹣y﹣1＝0是曲线y＝fx的一条切线．其中e为自然对数的底数 1求fx的解析式 2证明fx﹣lnx＞0．
已知fxgx分别是定义在R上的奇函数和偶函数且g0＝0当x≥0时fx+gx＝x2+2x+x﹣bb为常数则f﹣1﹣g﹣1＝
在△ABC中则＝
函数fx＝ex﹣e1﹣x﹣b|2x﹣1|在01内有两个零点则实数b的取值范围是
如图正方形网格纸中的实线图形是一个多面体的三视图则该多面体各表面所在平面互相垂直的有
如图所示正方体ABCD﹣A1B1C1D1的棱长为2EF为AA1AB的中点M点是正方形ABB1A1内的动点若C1M∥平面CD1E则M点的轨迹长度为．
将y＝fx的图象向右平移个单位再把所得图象上所有点的横坐标伸长到原来的2倍得到y＝sinx﹣的图象则fx＝
Manyofushaveconcernsaboutthechallengesfacingfuturegenerationsasourglobalpopulationandtheearth'snaturalresourcesdecrease. A.extends B.declines C.swells D.varies
已知函数fx＝|x+a|+|x+2|． 1当a＝﹣1时求不等式fx≥2x+3的解集 2若不等式fx＞|x﹣4|在[﹣11]恒成立求a的取值范围．
已知数列{an}满足a1＝1an+1＝2an+n﹣1． 1设bn＝an+n证明数列{bn}是等比数列 2设数列{an}的前n项和为Sn求Sn．
已知全集U＝{1234}集合A＝{23}集合B＝{13}则A∩∁UB＝
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