2025届贵州凯里一中高三最后一卷英语试卷含解析

2025届贵州凯里一中高三最后一卷英语试卷考生请注意：1．答题前请将考场、试室号、座位号、考生号、姓名写在试卷密封线内，不得在试卷上作任何标记。2．第一部分选择题每小题选出答案后，需将答案写在试卷指定的括号内，第二部分非选择题答案写在试卷题目指定的位置上。3．考生必须保证答题卡的整洁。考试结束后，请将本试卷和答题卡一并交回。第一部分（共20小题，每小题1.5分，满分30分）1．—WherewasI?—You________youdidn’tlikeyourjob.A．hadsaidB．saidC．weresayingD．hassaid2．Videogamescanbeapoorinfluenceif________inthewronghands.A．toleave B．leaving C．leave D．left3．Parentsneedtoencouragekidstodeveloptheirpotential_____puttingtoomuchpressureonthem.A．withoutB．besidesC．byD．for4．ThoughwintersinBritainarecoldandthereisusuallysnow,thereare________placesforskiing.A．some B．many C．few D．afew5．Ifwewantstudentstobecomeeffectiveinmulticulturalsettings,onethingisclear:thereisno________forpractice.A．prescriptionB．substituteC．appetiteD．suspension6．WeofferedtopayourhalfofthecostthatwasneededtorestoretheshareddoorwaybutCharleswouldhaveofit.A．nothing B．anythingC．none D．any7．Advertisingoftenfunctionsasanindicatorfor______societyconsiderstobesociallyacceptableanddesirableatthetime.A．what B．whetherC．how D．which8．-Ifeelcaughtbetweenexperienceandjobsaftergraduation.-It’sreally_________—withoutexperienceyoucan’tgetajobandwithoutajobyoucan’tgetexperience.A．acatch-22B．aHerculeantaskC．asacredcowD．aMickeyMousecourse9．．Whenhegoesout,heoftenwearssunglasses_______nobodycanrecognizehim．A．sothat B．nowthat C．incase D．asthough10．IfIcanhelp,Idon’tlikeworkinglateintothenight.A．so B．that C．them D．it11．Iusuallygotherebytrain.Whynot________byshipforachange?A．totrygoing B．tryingtogoC．totryandgo D．trygoing12．Jimtoldusallthat_______hesaidsoatthemeetingwasright.A．all B．whatC．allthat D．that13．Wecancommunicate________peopleineverypartoftheworld________theInternet.A．with；with B．with；throughC．through；through D．through；with14．--Canyousparemeafewminutesnow?--______,butI’llbefreethisafternoon.A．I’mafraidnot B．I’mnotsureC．Yes,withpleasure D．No,Iwon’t15．Janerealizedher____tobecomethefirstwomantorunthe10,000metreswithin30minutes.A．achievementB．commitmentC．competitionD．ambition16．HowwasyourtriptoXi'anlastmonth？--_____________.Itwasrainingcatsanddogsduringmystaythere.A．Wonderful B．ExcitingC．Notbad D．Itcouldn'tbeworse17．Thesenewbooksareaverywelcome_________totheschoollibrary.A．addition B．arrival C．attitude D．audience18．______almostonehundredjin,thestonewasmovedbyhimalone.A．Weighed B．Weighing C．Itweighed D．Toweigh19．Jackdecidedtochooseadifferent________andteachhistorythroughstorytelling.A．analysisB．angleC．attitudeD．approach20．HewasadmittedtoHarvardUniversity,________wasjustwhathisparentsexpected.A．who B．whichC．what D．where第二部分阅读理解（满分40分）阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。21．（6分）Ride-hailingappsandrobotcarspromisetochangehowwegetaroundandtheeffectsarealreadybeingfelt.TrafficinNewYorkisslowingdown.JamsarecommoninManhattan,especiallyinitsbusinessdistricts.Daytimetrafficinthebusiestareasnowmovesalmost20%moreslowlythanitdidfiveyearsago.Itseemsaplaceripeforwideuseofride-hailingappsthat,youmightthink,wouldreducesomeofthejams.However,thoseappsappeartobemakingthingsworseastraffichasslowedinlinewiththegrowingpopularityofappssuchasUberandLyft,astudybytransportexpertBruceSchallersuggests.Overthefouryearsofthestudy,thenumberofcarsinManhattanseekingride-hailingfaresincreasedby81%.Therearenowabout68,000ride-sharingdriversacrossNewYork.That’saboutfivetimesthenumberoftheyellowcabslicensedtooperatethere,hefound.Therearesomanydrivers,hisworksuggests,whospendabout45%oftheirsparetimejusttouringforfares.Thatisalotofunusedcarsblockingalotofbusystreets.Simplephysicsexplainswhyride-sharingvehiclesarecausing,notcuringjams,saidJarrettWalker,apublictransportpolicyexpertwhohasadvisedhundredsofcitiesaboutmovingpeople.“Lotsofpeoplearedecidingthat,’Oh,publictransportisjusttoomuchtroublethismorning,’orwhenever,whichcausesashiftfromit,”hetoldtheBBC．“Thatmeansmovingpeoplefromlargervehiclesintosmallerones,whichmeansmorevehiclestomovethesamepeople.Therefore,moretraffic.”Datagatheredaboutride-sharingdriversillustrateshowtheycontributetocongestion(塞车),saidProf.ChristoWilson,acomputerscientistatNortheasternUniversitywhohasstudiedtheservices.“YoucanlookatthetrafficpatternfortheUbervehiclesanditperfectlymatchesthepeaksfortherushhourandthepeaktimeofaday,”hesaid.Theyareoutthereinforceattheworstpossibletimes.1、WhatcanweknowaboutthecabsinNewYork?A．Morecabsareneededtomeetthedemand.B．Theyoftentouraroundthecityseekingusers.C．Theirfaresincreasedgreatlyoverthefouryears.D．Thenumberofthemisfarlessthanride-sharingcars.2、WhatisChristoWilson’sattitudetowardride-sharingpractice?A．Neutral B．NegativeC．Indifferent D．Supportive3、Whichofthefollowingbestreplaces“it”underlinedinParagraph5.A．Ajam. B．PublictransportC．Acar. D．Aride-sharingvehicle.4、Whatisthebesttitleforthetext?A．WorseRoadJams. B．AppMakesTerribleJams.C．EffortsNeededforTraffic. D．TechnologyCountsinFuture.22．（8分）Statistically,airtravelisbyfarthesafestwaytotravelandyoucanmakeflyingevensafer,justbyfollowingthesesimplerules．Asyourchancesofbeinginvolvedinanairaccidentarepracticallynil（零）,manyoftheserulesconcernwhatyoushouldandshouldn’tdotomakeyourjourneysaferwhenyouareintheair.●Flyonnon-stoproutesMostaccidentsoccurduringthetakeoff,climb,descentandlandingperiodofaflight,soflyingnon-stopreducesyourexposuretothesecomplicatedprocedures.●ChooselargeraircraftAlthoughsmallaircraftshaveverygoodsafetyrecords,thosewithmorethan30passengerseatsaredesignedtocomply（遵守）withmuchstricterregulationsandaretestedmoreregularlytomakesuretheystillcomply.Also,intheunlikelyeventofaseriousaccident,largeraircraftsprovideabetteropportunityforpassengersurvival.●Payattentiontothepre-flightsafetybriefing（简报）Theinformationmayseemtoberepeated,butit'sworthlisteningtotheflightattendants.Andevenifyouhaveflownbefore,itdoesn'tmeanyouknoweverythingabouttheaircraftyou'reon,suchasthelocationoftheclosestemergencyexit.●StorethingssafelyNeverputveryheavyarticlesintheoverheadstoragebins.Theymayfalloutwhensomeoneopensthebinandcauseinjury.Also,thebinmaynotbeabletoholdheavierobjectsduringtheviolentmovementsofaircausedbythewind.●KeepyourseatbeltfastenedwhileyouareseatedCabincrewalwaystellyouthis,butit'simportant.Youcouldbeseriouslyinjurediftheplanehitstheviolentmovementofairunexpectedly.Alwaysfastenyourseatbeltifyouaretoldto.Thegeneralruleofflyingisthis:Ifyouaretoldtodosomething,doitfirstandaskquestionslater.●LettheflightattendantpouryourhotdrinksFlightattendantsaretrainedtohandlehotdrinkslikecoffeeorteainacrowdedaisleonamovingaircraft,soallowthemtopourthedrinkandhandittoyou.Neverasktotakeacoffeepotfromoneofthem.1、Whatisthegeneralreasonfortheseairsafetyrules?A．Whattodointheeventofacrash.B．Howtoavoidsuddenchange.C．Howtoimprovesafetywhileyouareflying.D．Howtoavoidinjury.2、Theunderlinedphrase"Thegeneralrule"inthefifthrefersto.A．anythingtheflightstafftellyoutodoB．generalsafetyadviceC．walkingaroundtheplaneD．pouringhotdrinks3、WhichofthefollowingisNOTtrue?A．largerplaneshavemoresafetychecksandaresaferinanaccident.B．Take-offsaresaferonnon-stopflightsthanlanding.C．Everyaircraftisdifferent,sothesafetyproceduresmaybedifferent.D．Seatbeltsshouldbeworntoprotectagainstsuddenchange.4、Thebesttitleshouldbe.A．ThesafestwaytotravelB．AirsafetytipsC．Non-stopRoutesD．Howtotakeaplane23．（8分）AteamofengineersatHarvardUniversityhasbeeninspiredbyNaturetocreatethefirstroboticfly.Themechanicalflyhasbecomeaplatformforaseriesofnewhigh-techintegratedsystems.Designedtodowhataflydoesnaturally,thetinymachineisthesizeofafathousefly.Itsminiwingsallowittostayintheairandperformcontrolledflighttasks.“It’sextremelyimportantforustothinkaboutthisasawholesystemandnotjustthesumofabunchofindividualcomponents(元件),”saidRobertWood,theHarvardengineeringprofessorwhohasbeenworkingontheroboticflyprojectforoveradecade.Afewyearsago,histeamgotthego-aheadtostartpiecingtogetherthecomponents.“Theaddeddifficultywithaprojectlikethisisthatactuallynoneofthosecomponentsareofftheshelfandsowehavetodevelopthemallonourown,”hesaid.Theyengineeredaseriesofsystemstostartanddrivetheroboticfly.“Theseeminglysimplesystemwhichjustmovesthewingshasanumberofinterdependenciesontheindividualcomponents,eachofwhichindividuallyhastoperformwell,butthenhastobematchedwelltoeverythingit’sconnectedto,”saidWood.Theflightdevicewasbuiltintoasetofpower,computation,sensingandcontrolsystems.Woodsaysthesuccessoftheprojectprovesthattheflyingrobotwiththesetinycomponentscanbebuiltandmanufactured.Whilethisfirstroboticflyerislinkedtoasmall,off-boardpowersource,thegoaliseventuallytoequipitwithabuilt-inpowersource,sothatitmightsomedayperformdata-gatheringworkatrescuesites,infarmers’fieldsoronthebattlefield.“Basicallyitshouldbeabletotakeoff,landandflyaround,”hesaid.Woodsaysthedesignoffersanewwaytostudyflightmechanicsandcontrolatinsect-scale.Yet,thepower,sensingandcomputationtechnologiesonboardcouldhavemuchbroaderapplications.“Youcanstartthinkingaboutusingthemtoansweropenscientificquestions,youknow,tostudybiologyinwaysthatwouldbedifficultwiththeanimals,butusingtheserobotsinstead,”hesaid.“Sotherearealotoftechnologiesandopeninterestingscientificquestionsthatarereallywhatdrivesusonadaytodaybasis.”1、Thedifficultytheteamofengineersmetwithwhilemakingtheroboticflywasthat__________.A．theyhadnomodelintheirmindB．theydidnothavesufficienttimeC．theyhadnoready-madecomponentsD．theycouldnotassemblethecomponents2、Itcanbeinferredfromparagraphs3and4thattheroboticfly__________.A．consistsofaflightdeviceandacontrolsystemB．canjustflyinlimitedareasatthepresenttimeC．cancollectinformationfrommanysourcesD．hasbeenputintowideapplication3、Whichofthefollowingcanbelearnedfromthepassage?A．Theroboticflyerisdesignedtolearnaboutinsects.B．Animalsarenotallowedinbiologicalexperiments.C．Thereusedtobefewwaystostudyhowinsectsfly.D．Wood’sdesigncanreplaceanimalsinsomeexperiments.4、Whichofthefollowingmightbethebesttitleofthepassage?A．FatherofRoboticFlyB．InspirationfromEngineeringScienceC．RoboticFlyImitatesRealLifeInsectD．HarvardBreaksThroughinInsectStudy24．（8分）TheSongDynasty(960-1279)isoftenreferredtoastheChineseRenaissance(文艺复兴).Foraboutthreeandaquartercenturies,underitsrule,Chinaenjoyedaperiodofeconomicgrowthwithgreatartisticandintellectualachievements.OneofthemostimportantfactorsintheSongRenaissancewastheprintingpresswhichmadeforarebirthofclassicalConfucianlearning.Bythe10thcentury,printerswereproducingalargenumberofcopiesoftheclassicalConfuciantexts.Withthisincreaseintheproductionofbooks,educationspreadandbecamewidelyavailable.PrintingalsohaditsgreatestinfluenceontheChinesepoliticalsystem.IntheSongDynasty,govemmentexaminationsbecamethemostimportantwaytopoliticalpowerinChina.Foralmost1,000years,Chinawasgovemedbymenwhohaddoneverywellinexaminations.Thousandsofstudentsstudiedfortheexams,andthousandsofinexpensivebookswererequired.Withoutprinting,suchasystemwouldnothavebeenpossible.TheSongperiodwasalsothegoldenageofChinesepainting.EmperorHuizong(1101-1125)wasatalentedpainterwhoencouragedthearts.Aroyalpaintingacademywascreatedandmanyfineartistsweresupported.Theperiodisbestknownfornaturesubjectsandlandscapepaintings.GuoXiusedperspectiveinhispaintingsandTheQuictValleyisoneofhisbest-knownworks.OneofthegreatestlandscapepaintersoftheperiodwasFanKuan.Hismasterpiece,TravellingamongMountainsandGorges,isoneofthemostfamousChinesepaintings.Completedaroundtheyear1000,itwasinspiredbythepowerofnatureandtherelativeinsignificanceofhumans.1、WhenwastheChineseRenaissance?A．ImmediatelyaftertheRenaissanceinEurope.B．DuringtheSongDynasty.C．AtthetimeofConfucius.D．intheyear1,000.2、WhatcontributedtospreadingtheideasofConfucius?A．Thespreadofeducationtothemiddleclasses.B．People’snewinterestinclassicaltexts.C．Thedevelopmentofpainting.D．Theprintingpressandawideavailabilityofbooks.3、Howdidpeoplebecomepoliticiansatthetime?A．Onlymembersofthewealthyclasscouldgointopolitics.B．Asmallnumberofpowerfulfamiliesranthecountry.C．Onlymembersgoodatpaintingweresupportedbytheroyalty.D．Therewasaspecialexamsystemtoselectpoliticians.4、FromthepassagewecanknowthepainterofTravellingamongMountainsandGorgesis＿＿＿．A．GuoXiB．EmperorHuizongC．FanKuanD．Confucius25．（10分）Bookstoresareatraveller'sbestfriend:theyprovideconvenientshelterinbadweather,andtheyoftenhostreadingsandotherculturalevents.Hereisalookatworld’ssixgreatestbookstores.AdrianHarrington—since1971.Rarebooks;rarefirsteditions;leatherboundsetsandgeneralantiquarian(古玩).Address:64AKensingtonChurchStreet,Kensington,London,England,U.K.AnotherCountry—Kreuzberg,Berlin,Germany.AnotherCountryisanEnglishLanguagesecondhandbookshopwhichismostlyusedasalibrary.Theyhaveabout20,000booksthatyoucanbuyorborrow.Someregulareventsareheldattheshop,suchasreadings,culturalevents,socialeveningsandfilmnights.AtlantisBooks—Oía,Santorini,Greece.AtlantisBooksisanindependentbookshopontheislandofSantorini,Greece,foundedin2004byagroupoffriendsfromCyprus,England,andtheUnitedStates.Throughouttheyearithashostedliteraryfestivals,filmscreenings,bookreadings,andgoodoldfashioneddanceparties.Bart’sBooks—Ojai,California,U.S.A．“TheWorld’sGreatestOutdoorBookstore”,abookstorefoundedbyRichardBartinsdalein1964.Shelvesofbooksfacethestreet,andregularcustomersareaskedtodropcoinsintothedoor’scoinboxtopayforanybookstheytakewheneverthestoreisclosed.10CorsoComo—Milan,Italy.Extensiveselectionofpublicationonart,architecture,design,graphicsandfashion,alongwithastrongemphasisonphotography.Itwasfoundedin1990inMilan,Italy,byCarlaSozzani.TheBookworm—Abookshop,library,bar,restaurantandeventspace,nowwithfourdivisionsinthreecities—Beijing,SuzhouandChengdu.Theinterconnectingroomswithfloor-to-ceilingbooksoneverywallarelightandairyinsummer,yetwarmandcomfortableinwinter.1、Whichofthefollowingbookstoreshasthelongesthistory?A．AdrianHarrington. B．AtlantisBooks.C．Bart’sBooks. D．10ComoBookshop.2、WhatcanyoudoinAtlantisBooks?A．Attendafestival. B．Learnphotography.C．Enjoyrarebooks. D．Buybooksanytime.3、HowisTheBookwormdifferentfromtheotherbookstores?A．Itisusedasalibrary. B．Ithostsallsortsofactivities.C．Itfocusesonphotography. D．Ithasbranchesindifferentcities.第三部分语言知识运用（共两节）第一节（每小题1.5分，满分30分）阅读下面短文，从短文后各题所给的A、B、C和D四个选项中，选出可以填入空白处的最佳选项．26．（30分）Ayoungmanwasgettingreadytograduatefromcollege.Formanymonthshehad1abeautifulsportscarinashowroom,andknowinghisfathercouldwell2it,hetoldhimthatwasallhewanted.AsGraduationDaycamenear,theyoungmanawaited3thathisfatherhadboughtthecar.4,onthemorningofhisgraduation,hisfathercalledhimintohis5studyroom.Hisfathertoldhimhow6hewastohavesuchafineson,andtoldhimhow7helovedhim.Hehandedhissonabeautifully8giftbox.Curious,andsomewhatdisappointed,theyoungmanopenedtheboxand9alovely,leather-bound(皮纸封面)Bible,10theyoungman'snamepressedingold.11,heraisedhisvoicetohisfather,andsaid“With12yourmoney,yougivemeaBible?”andstormedoutofthehouse.Manyyearspassedandtheyoungmanwasverysuccessfulin13.Hehadabeautifulhomeandwonderfulfamily,butrealizedhisfatherwasvery14,andthoughtperhapsheshouldgotohim.Hehadnotseenhim15thatgraduationday.Beforehecouldmakearrangements,hereceivedatelegram16himhisfatherhadpassedaway,andgaveallhispossessionstohisson.Heneededtocomehomeimmediatelyand17things.Whenhearrivedathisfather'shouse,sudden18andregretfilledhisheart.Hebegantosearchthroughhisfather'simportantpapersandsawthestillgift—wrappedBible19ashehadleftityearsago.Withtears,heopenedtheBibleandbegantoturnthepages.Suddenly,acarkeydroppedfromthebackofthe20.Ithadatag(标签)withthedateofhisgraduationonit,andthewordsPAIDINFULL.1、A．admiredB．watchedC．seenD．noticed2、A．offerB．affordC．serveD．supply3、A．marksB．supportsC．signsD．promises4、A．FinallyB．InsteadC．SoD．Shortly5、A．publicB．hardC．lazyD．private6、A．proudB．sadC．upsetD．puzzled7、A．manyB．farC．muchD．often8、A．typedB．wrappedC．writtenD．painted9、A．lookedB．reachedC．showedD．found10、A．withB．whileC．afterD．when11、A．InterestedB．PleasedC．AngryD．Disappointed12、A．noneB．allC．littleD．bit13、A．businessB．studyC．cityD．home14、A．healthyB．strongC．youngD．old15、A．onB．untilC．sinceD．after16、A．tellingB．showingC．sayingD．talking17、A．lookforB．takecareofC．careD．mind18、A．excitementB．disappointmentC．surpriseD．sadness19、A．butB．rightC．justD．only20、A．BibleB．bedC．deskD．door第二节（每小题1.5分，满分15分）阅读下面材料，在空白处填入1个适当的单词或括号内单词的正确形式。27．（15分）Paper-cuttingwasrecognizedasanationalculturalheritage(遗产)in2006.Accordingtoexperts，paper-cuttingconveystheculturesharedbetweenChina1．theWesttowishforfamilyreunionsandmaintainlinkswithlovedones，aliveordead.InthemovieCoco，forinstance，the12-year-oldMiguelandhisfamilydanceandsingtocelebratetheDayoftheDead，a2．(tradition)festivalinMexico，whencolorfulpaper-cutsarehungonthestreet.Chinesepeoplealsocutimagesofsmallfigures3．(call)backthespiritsofthedead.ThedifferenceisthatmostChinesepaper-cutsarered，whilethoseinothercountries4．(be)oftenmadeinmanyothercolors.FairytalewriterHansChristianAndersenlikedtocut5．(character)，suchasprincessesandangels，outofpaperwhile6．(tell)storiestochildren.InChina，femalefriendsandfamilymembersusedtochatandmakepaper-cutstogether.“7．thepatternsandcolorsmaybedifferent，paper-cutssharethesamefunctionofmaintainingemotionaltiesamongpeople，”saysYangHuizi，8．artteacheratBeijingUnion.Yang9．(study)andperformedtheartforoveradecade.Besidesroutineuniversitycourses，shealsoorganizesnonprofitpaper-cuttingactivities10．areopentothepublicinBeijingtopromotebasicknowledgeofpaper-cutting.第四部分写作（共两节）第一节短文改错（满分10分）28．（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：在错的词下画一横线，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。DearSue,Howtimeflies、Itisamonththatyoustayedwithus、Weallmissyouandareverygratefultowhatyoudidforuswhenweweretogether、WehadanEnglishspeechcontesttheothersdayandIwonthefirstprize,whichagainremindmeofallyourkindhelp、Doyoustillrememberthetreewhatwasplantedbyustogetheronthehillbehindtheschool?Yesterdaywewentthereandgotitwater、ThetreeyouplantedyourselvesisgrowingwellandwholeclassdecidedtonameitSuewood、WillyoucomebacktoseeSuewood?Howiseverythingwithyoulater?WehopetoknowmoreaboutyouandyourAmericanstudents、Hopetokeepinclosetouchwith、AllthebestLiuHua第二节书面表达（满分25分）29．（25分）假定你是李华，你们班打算下周二举行班级音乐会，请你代表班级邀请你校外教David参加。内容包括：1.时间：下周二下午2:00。2.地点：校礼堂。3.节目：各种乐器演奏,粤语歌曲,京剧等。4.希望David老师也能表演一个节目，乐器或歌曲。注意：1.词数100左右；2.可以适当加入细节,使内容充实、行文连贯；3.称呼和落款已给出,不计入总词数；4.礼堂auditorium；粤语歌曲Cantopopsongs.DearDavid,__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________LiHua

参考答案第一部分（共20小题，每小题1.5分，满分30分）1、B2、D3、A4、C5、B6、C7、A8、A9、A10、D11、D12、A13、B14、A15、D16、D17、A18、B19、D20、B第二部分阅读理解（满分40分）阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。21、1、D2、B3、B4、B22、Spaceiswhereourfutureis—tripstotheMoon,Marsandbeyond.Mostpeoplewouldthinkthatasidefromcomets(彗星)andstars,thereislittleelseoutthere.But,sinceourspacejourneystartedwehaveleftsomuchtrash（垃圾）therethatscientistsarenowconcernedthatifwedon'tcleanitup,wemayallbeinmortal（致命的）danger.Thefirstpieceofspacejunkwascreatedin1964,whentheAmericansatelliteVanguardIstoppedoperatingandlostitsconnectionwiththegroundcenter.However,sinceitkeptorbitingaroundtheEarthwithoutanyconsequences,scientistsbecameincreasinglycomfortableabandoning（抛弃）thingsthatnolongerservedanyusefulpurposeinspace.Itisestimated（估计）thattherearenowover500,000piecesofman-madetrashorbitingtheEarthatspeedsofupto17,500milesperhour.Thejunkvariesfromtinypiecesofpaintchippedoffrocketstocameras,hugefueltanks,andevenodditemslikethemillion-dollartoolkitthatastronautHeidemarieStefanyshynPiperlostduringaspacewalk.Themajorproblemwiththespa