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从1，2，3，4，5这5个数字中随机抽取3个不同的数字，则这3个数字经过适当排序后能组成等差数列的概率为 ．
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高三下学期数学《》真题及答案
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从数字12345中随机抽取3个数字允许重复组成一个三位数其各位数字之和等于9的概率为
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用12345这五个数字组成没有重复数字的自然数从小到大顺序排列123451254321其中第206个
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在12345这五个数字组成的重复数字的三位数中奇数共有
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从集合{12345}中随机选取3个不同的数这3个数可以构成等差数列的概率为________.
从12345这5个数中随机抽取2个不同的数则这2个数的和为偶数的概率是.
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从12345五个数字中任意有放回地连续抽取三个数字则三个数字完全不同的概率是_________.
从12345这五个数字中先随意抽取一个然后从剩下的四个数中再抽取一个则两次抽到的数字之和为偶数的概率
在一个袋中装有五个除数字外其它完全相同的小球球面上分别写有12345这5个数字.小芳从袋中任意摸出一
从数字12345这5个数中随机抽取2个不同的数则这两个数的和为偶数的概率是
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从数字12345这五个数中随机抽取2个不同的数则这2个数的和为偶数的概率是
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三条线段的长度分别为3x和|x﹣3|+2从12345这5个数字中随机抽取一个数作为x的值恰好能使三
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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. IfyouhaveachancetogotoWuhanavisittoHubuAlleyissomethingnottobemissed.LocatedinWuchangDistrictHubuAlleyiswideknownformouth﹣wateringsnacks.Eachtimewhenyougotherethealleyiscrowdedwithpeople.TherearevarioustastyfoodstochooseofincludingsteamedporkdumplingsJingwuduckneckandhotdrynoodlesallofthemarenativetoWuhan.Wanderingalongthestreetyoumayappreciatethecookingprocessonspot.Somefoodstandshaveevenbeenexistedthereforseveralgenerationsduringwhichthemethodoffoodpreparationtogetherwiththesecretingredientshadremainedunchanged.Theseattentiveeffortsareaimedtodelivertheoriginalflavorasbefore.Inawaythesedistinctivesnackmakeyoueasytoexperiencethefolkculture.ExposingtothetraditionalfoodyouwillsurelyhaveadeeperunderstandingofWuhan.
8分Theabilitytopredictthefutureisararetalent.AmericanauthorIsaacAsimovoneofthegreatestscience﹣fictionwritersofhisagehadsuchatalent.Backin1983hewasaskedtopredicthowtheworldwouldlooklikein2019.Nowthatwe'reherelet'sseewhathegotright. Ontherolethatcomputingwouldplayinthefuturehewasamazinglyaccurate.Asimovthoughtcomputerswouldcausearevolutioncomparabletotheindustrialrevolutionofthe19thcentury.Specificallyhesaidthatmobilecomputerizedobjectswouldbeanimportantpartofeverydaylife.Hereheclearlyforesawourworldofsmartphonestabletsandotherdevices.Healsohadagreatdealtosayaboutspaceexploration.TheInternationalSpaceStationproveshispredictionthatwewouldnotsimplyvisitspacebutseektostaythere. HowdidAsimovdevelophisspecialsenseoffuturedevelopmentsAsaprecociousboyAsimovtaughthimselftoreadattheageoffive.Hereadthenewspapersandmagazinessoldinhisparents'candystore.HisscientificinterestsgainedsharperfocusatColumbiaUniversityinNewYork.Asimovwenttostudychemistrybutbecameboredwithpurelaboratoryscience.Insteadhethoughthardaboutthesocialsignificanceofscience.Hewantedtocommunicatehisideastothepublic.Asanauthorhisbookswouldfeaturethethemeofsocialchangecausedbytechnology. Asimovhadhisfingeronthepulseofbothscientificandsocialchange.HehadaclearsightofwhatwascomingaroundthecornerforhumanityinhisworksliketheGalacticEmpireseries. HispredictionsareabsolutelyfascinatingCalumChaseanEnglishwritertoldBBCNews.Hewasagenius. 1WhichofthefollowinghasAsimovmadeapredictionabout ①computers②environment③tablets④space⑤pollution⑥smartphones A.②⑤⑥ B.①③④ C.②③④ D.①⑤⑥ 2WhatdoweknowaboutAsimov A.Asimovhadgreatinterestinpurelabscience. B.Asimovkeptpacewithscientificandsocialchange. C.Asimovcaredlessaboutthesocialsignificanceofscience. D.Asimovwouldreadinhisneighbor'scandystoreinhischildhood. 3Whatdoestheunderlinedwordprecociousinthethirdparagraphprobablymean A.Talented. B.Naughty. C.Considerate. D.Optimistic. 4Whatwillbethebesttitleofthepassage A.TheFocusonSocialChange B.AGreatScience﹣fictionWriter C.TheAbilitytoPredicttheFuture D.TheManWhoCouldSeetheFuture
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30分MynameisMargaretandmystorybeginsfromhere.Iwasborninapoorfamily.While1upIsawmyparentsdoingwhattheycouldformeandmybrother.Theytriedto2allourwisheswithoutbuyinganythingforthemselves.Thesmallamountofmoneythey3theyputitallinourchildhoodtoensurewedon'tfeel4thanotherkidsaroundus.Idecidedtofocusonmy5andgivemyparentsabetterlifealifethatthey6forallthehardworktheyhavedone. EventuallyIfinishedmygraduationandgot7intoaleadingfirm.Intheprocessofrealizingmy8Ibecameaworkaholictakingmybodyandmyhealthforgranted.SoonIwasmentally9.IwasdiagnosedwithG.B.Sararediseasewhichcausedparalysisofmywholebody.Mybreathingwasbecomingmoreandmore10formewhileIwasintheICU.Iwasinthehospitalfor2monthsonlife11duringwhichtimeIhadsurvivedsomenear12experiences.Thereisnocureforthisdiseaseapartfromregainingmusclestrengthand13backtheerasedmusclememory.Ihadtwo14atthattimefirstwastogiveupand15thatIwillneverbemyselfagainandtheotherwastokeep16.Ichosetobemyownmiracle.Ipractisedanythingthatcouldhelpmegobacktowork17havinganycaretakersaround.FinallyaftertwoyearsofhardworkIwas18togotoworkagain.NowwheneverIseethosewhoarealwaysworkingand19seemtostopItellthemYouareluckyandit'sablessing! This20hasgivenmealifelessonIt'sthedooryouchoosethatwilldecidewhetheryouwillflyorliveyourlifeinacage. 1A.staying B.getting C.growing D.looking 2A.respect B.expect C.send D.fulfill 3A.donated B.earned C.counted D.owed 4A.less B.hungrier C.sadder D.busier 5A.interests B.programmes C.studies D.careers 6A.make B.wait C.deserve D.lose 7A.transformed B.placed C.caught D.lost 8A.profits B.mistakes C.dreams D.values 9A.addicted B.abused C.restored D.exhausted 10A.difficult B.frequent C.comfortable D.popular 11A.style B.boat C.condition D.support 12A.death B.success C.sickness D.happiness 13A.turning B.holding C.bringing D.keeping 14A.purposes B.options C.problems D.wishes 15A.expect B.realize C.deny D.accept 16A.reforming B.thinking C.pushing D.failing 17A.without B.by C.for D.before 18A.scared B.willing C.ready D.annoyed 19A.never B.indeed C.often D.actually 20A.principle B.journey C.opportunity D.wisdom
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30分Walkingacrosscampuswitheverypairofeyesonyoucanbeembarrassingespeciallywhenyou're13yearsold.Ilookedaroundmein1ofafriendlyfaceasmileanything.Iwasquitedisappointed.AndI2feltsomewhatfoolishwalkingacrosscampus3withafalsesmileplastered粘贴acrossmyface.Iwassimply4tofollowtheadvicemymotherhadgivenmeyearsbeforewhenthingsget5smile.Nomatterwhereyouareasmilewillalwaysbeunderstood.Asmileis6.AtthatverymomenthoweverIfeltmymother'sadvicedidn't7. Whentheteacher8metotheclassastheAmericangirl10setsofhandsimmediatelyshotup.Somestudentshad9otherswantedtopracticetheirEnglishwithme.BecauseIcouldn'tspeakmuchChinese10Icommunicatedwiththemviagesturesmixedinwith11EnglishandChinese.AlthoughIwas12Iwasn'tsurehowmuchofitwas13.Itwasalmostasiftheywere14aboutmeandIwasbeingexamined.15whocouldblamethemAfterallIwasthefirstAmericaneverto16theschool. ThenfromacrosstheroomaChineseclassmatesuddenly17atmeandmynerveswereinstantly18.Thoughthereareculturalandlanguage19weweresharingsomethingincommon.Andasusualmymotherwasright.Asmiledoesmakea20. 1A.favor B.memory C.place D.search 2A.inturn B.inreturn C.inaddition D.invain 3A.steadily B.attractively C.alone D.unwillingly 4A.helping B.attempting C.pretending D.undertaking 5A.awkward B.smooth C.ready D.attainable 6A.universal B.warm C.ordinary D.traditional 7A.last B.work C.exist D.change 8A.led B.introduced C.took D.invited 9A.examinations B.explanations C.questions D.thrills 10A.either B.often C.sometimes D.yet 11A.broken B.standard C.fluent D.everyday 12A.spotted B.focusedon C.ignored D.watchedout 13A.positive B.direct C.interesting D.open 14A.hopeful B.nervous C.worried D.curious 15A.Aboveall B.Oncemore C.Thenagain D.Asusual 16A.attend B.leave C.study D.explore 17A.shouted B.waved C.nodded D.smiled 18A.felt B.touched C.calmed D.tested 19A.similarities B.barriers C.links D.connections 20A.fortune B.noise C.deal D.difference
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8分TheMcDonnellslivedinasmallbrickhouseinLarchmontasuburbofNewYorkCity.Jimwasforemanofmailcarriersatthepostofficewherehehadworkedfor25years.Marriedin1960heandAnnewerechildless. OntheeveningoftheeleventhanniversaryoftheirmarriagecarryingoutthegarbageJimMcDonnellslippedonice﹣coatedstepsandstruckhishead.Afewdayslaterdrivingtoworkhelostcontrolofthecarhitatelephonepoleandbangedhisforeheadagainstthewindshield.Thefollowingdayhefelloffthestairsandagainhebangedhishead.Foundunconscioushewashospitalizedforthreedayswithacerebralconcussion脑震荡.OnedayinthesamemonthJimborrowedafriend'sstationwagonanddrovetoKennedyAirporttopickupAnne'sbrotherandfamily.Whenhereturnedtheborrowedcarat10p.m.hewasunawarethatthewalletcontaininghisidentificationhadslippedoutofhispocketontothefloorofthestationwagon.Afterthathewasneverseenagain. SowhatreallyhappenedtoAnne'shusbandDuringhiswalkhomeJimhadindeedblackedout昏厥losingallabilitytorememberwhohewasandwherehelived.Whathappenedthenisunclear.ThenextthingheknewwasthathewasindowntownPhiladelphiaacityhehadnevervisitedbefore.SeeingsignsadvertisingtheservicesofaJamesPetersarealestatebrokerJimadoptedJamesPetersashisownname.Hehadnopasthisonlyrealitywasthepresent.JamesPetersgotaSocialSecuritycardwhichcouldbeobtainedatthattimewithoutshowingabirthcertificateandtookajobinahealthclub.Henextworkedatacancerresearchinstitutecleaningoutanimalcages.HealsogotanightshiftjobattheP&Pluncheonettewherehebecamewellknownforhisomeletsaswellashiscourtesyandgoodhumor. AboutamonthbeforeChristmas1985colleaguesnoticedthatJimhadgrownunusuallyquietanddepressed.Somethingseemedtobeturninginhismind.OnDecember22Jimhadfallenandbangedhishead.Thenextdayatworkheseemeddistractedandlatethatafternoonhehadfallenagainstrikinghishead.OnDecember24heawokefeelingconfusedyetdelighted.Afteralmost15yearsheknewwhohewas!HewasJamesA.McDonnellJr.ofLarchmontNewYork.Hiswife'snamewasAnne. AnnehadjustreturnedhomefromChristmasMasswhereshelitcandlesandprayedforJim.AlightsnowwasfallingandshewasinahurrytoleaveforChristmasdinnerathersister'sbeforetheroadsgrewslick.Thenthedoorbellrang.Ohmyshethoughtthisisnotagoodtimeforavisitor.Anneopenedthedoor﹣andsawamanwithafullwhitebeard.ImmediatelysherecognizedJim.Shecouldn'tspeak. ToJimAnnelookedalittleolderbutprettiertoo.Hisheartoverflowed. HelloAnnehesaid. 1InwhichyeardidJamesA.McDonnellgetmissing A.1960 B.1965 C.1971 D.1985 2WhichCANNOTexplainthesentenceHehadnopastinParagraph3 A.HehadnoSocialSecurityCardbeforehegotlost. B.Helosthismemoryafterhisblackingout. C.Helosthiswalletcontaininghisidentification. D.Hewenttoacompletelystrangecity. 3HowdidJimfeelonseeinghiswifeAnne15yearslater A.scared B.funny C.moved D.anxious 4Whatwouldbethebestsentencefollowingthelastsentenceofthispassage A.JimherbreathcameinburstsIsittrue B.YessheseemedpuzzledAndyouarelookingfor… C.WellJimhervoiceindelightLongtime. D.ComeoninsaidAnneI'mexpectingyou.
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在下列生理状态下细胞内自由水与结合水比值增加的是
6分 SummerCamps Makeyoursummermagicalwithaone﹣of﹣a﹣kindsummercampexperience! Half﹣dayweek﹣longcampsareheldfrom9am﹣12pmor1pm﹣4pm. Dailysnackswillbeprovidedandevenbecomepartofthehands﹣onfun! Session1﹣﹣﹣OceanCommotion暴动 Setsailforfunandadventureonthedeepbluesea!CampersexploreunchartedlandatTheMagicHouseanddiscoversomethingfishyastheycomeintotheexcitingworldofseacreatures. June6﹣10 June13﹣17 June20﹣24 Session2﹣﹣﹣SuperkidsExploreEarth Campersbecomesuperheroestotheearthastheylearnabouttheenvironmentanddiscoverhowtousetheirsuperpowerstoprotectit!Duringthisaction﹣packedweekcamperswillexploretheearthfromtheskytotheseaandparticipateinfunearth﹣friendlyactivitiessuchasturningtrashintotreasure. June27﹣July1 July11﹣15 July18﹣22 Session3﹣﹣﹣OnceUponATime Atthisuniquefairytale﹣themedcampcampershaveamagicalmake﹣believeadventurethroughthepagesofsomeoftheirfavoritestorybooks.Campersexperiencegaint﹣sizedfunastheyusetheirimaginationstotraveltoplacesfoundonlyinfairytales. July25﹣29 August1﹣5 August8﹣12amsessionsonly Allcampersmustberegisteredinadvance. 1Whatdoestheunderlinedwordone﹣of﹣a﹣kindinParagraph1mean A.Long B.Unique C.Official D.Moving 2WhatisthemainpurposeofSession2 A.Toencouragereading. B.Toinspireimagination. C.Todevelopthespiritofadventure. D.Toraiseenvironmentalawareness. 3WhatdocampersprobablydoduringSession3 A.Readfairystories. B.Travelthecountry. C.Searchfortreasure. D.Learnaboutanimals.
30分ThestagelightsdimmedandItookaquicklookfrombehindtheheavyblackcurtainsintothe1.BlindedbythelightsIquickly2.Itseemsthatagreatnumberofeyeswerelookingatme.Itookadeep3asthemusicofmydancebegantoplay.Ienteredthestageandbeganmy4thegraduationtestoftheclassicalIndiandance. AfteradecadeoflearningthisartformIhad5beenconsideredreadytotakeonthemostdifficultact.Thetestisthemostimportanteventinadancer'slifeasitpays6toallthefactorsinone'slifethat7thedanceformone'scultureandfamily. Theperformanceisundertakenonlybythemost8anddeterminedstudents.Itisadifficultprocessthatrequiresmuchcommitment.FormorethansixmonthsIspenttwotothreehourseveryday9thesedances.ManytimesI10myselftomyphysicalandmentalbreakingpointbutstillIwouldnotstop.Icouldnotgiveup.Therewasalwayssomuchmoretodoandsomuchmoreto11. I12alotaboutmyselfinthosetiringhours.IlearnedthatIwasfartoo13togiveupandIwastooproudtoprovemyself14afterIhadsetanunrealisticgoal.Evenwithphysicalpainandmental15Iforcedmyselftomeetmy16.EvenwhenIwasattheendofmy17therewasalwayssomethingdrivingmeonforcingmenottogiveup. FortunatelyImadeit.WhatIhaddone18thesuccess.ItwasinthosehoursthatIlearnedwhatadancer19is.ThosetimewasevidencethatIcould20somethingIsetouttodo. 1A.carpenter B.audience C.actress D.Diver 2A.pulledback B.setoff C.reachedout D.brokeaway 3A.sleep B.thought C.breath D.sorrow 4A.career B.attempt C.response D.performance 5A.easily B.eventually C.occasionally D.directly 6A.debt B.visit C.interest D.respect 7A.develop B.rescue C.introduce D.convince 8A.focused B.beautiful C.intelligent D.considerate 9A.recording B.practicing C.discussing D.designing 10A.applied B.addicted C.treated D.pushed 11A.forget B.design C.learn D.research 12A.regretted B.discovered C.controlled D.confused 13A.brilliant B.brave C.stubborn D.discourage 14A.wrong B.nervous C.frightened D.careless 15A.function B.action C.level D.stress 16A.budget B.expectation C.cost D.deadline 17A.limit B.purpose C.preparation D.destination 18A.increased B.deserved C.expanded D.exposed 19A.completely B.chiefly C.truly D.originally 20A.change B.supply C.explain D.achieve
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