2026届山东省五莲县高三英语第一学期期末学业质量监测模拟试题含解析

2026届山东省五莲县高三英语第一学期期末学业质量监测模拟试题考生请注意：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．InmanyhomesintheUK,thefirstperson_______hastomaketeaforthefamily.A．wakingup B．towakeupC．wokeup D．wokenup2．—Youcouldalwaysputthedecisionoffalittlebitlonger.—__________IfIleaveitmuchlongerImightmissmychance.A．That’sreasonable. B．Isn’titagoodidea?C．Doyouthinkso? D．Ican’tagreemore.3．Thewaitressattherestaurantwasusuallyveryconsiderate,butonthisoccasionsheseemedto________thediners.A．ignore B．identify C．applaud D．satisfy4．Eversincethenewparkwasopenedtothepubliclastmonth,I______awalkiniteverymorning.A．amtaking B．takeC．havetaken D．havebeentaking5．IorderedadrinkwhileI______formyfriendstocome.A．willwaitB．amwaitingC．wouldwaitD．waswaiting6．Theweatherturnedouttobefine.I_____________thetroubletocarrytheumbrellawithme.A．shouldhavetaken B．musthavetakenC．couldn'thavetaken D．needn'thavetaken7．Ineedtobemorematureandreadyto______mymistakes.A．holdonto B．cutoff C．makeupfor D．takeup8．He______achancetotryitagainjustnow.A．gaveB．willgiveC．isgivenD．wasgiven9．Wearelivinginanagemostofthingsaredoneoncellphones.A．which B．thatC．whose D．when10．Luciaimpressedherpeerstudentswithhermusicaltalent,aswellasseveralforeignlanguages______.A．onherown B．underhercontrol C．inhercharge D．athercommand11．Ifhehadbeenworkinghard,he______intheofficenow.However,hedidn’t.A．wouldbeworking B．weretobeworking C．wasworking D．shouldwork12．—Whatwasitthatcausedthepartytobeputoff?—________theinvitations.A．BecauseTomdelayedsendingB．TomdelayedtosendC．ThatTomdelayedsendingD．Tomdelayedsending13．Runningisoftentiringandalotofhardwork,butnothing________thefeelingyougetafterfinishingalongworkoutaroundthetrack.A．breaks B．blocksC．bonds D．beats14．________workandcreativeactivitieshavebeenimportantdriversofhumanprogressisdeeplyrootedinoursocialvalues.A．HowB．WhetherC．ThatD．Why15．Whenwehaveachancetotravel,wetendto______asmanysightsintothetripaswecansevencountriesintendays,forexample.A．squeeze B．sneeze C．subscribe D．substitute16．Itrainedheavilyovernightandnotuntilthismorning__________.A.haditstopped B．diditstopC．stoppedit D．itstopped17．—UncleWangisinhospital.—Oh,really?I____________.I_____________goandvisither.A．didn’tknow;amgoingtoB．hadn’tknown;wouldC．haven’tknown;willD．didn’tknow;will18．Don’tworry,Mum.Thedoctorsaiditwasonlytheflu.__________!I’lltelldadthere’snothingserious.A．CongratulationsB．WhatareliefC．HowsurprisingD．I’msosorry19．Althougheverythingseemstohavebeentakenintoconsideration,________accidentcanhappenwhentheastronautswalkin________space.A．/;the B．an;the C．the;the D．an;/20．Thelittlegirl________aforeignlanguagefairlyquickly.A．pickedup B．gotup C．steppedup D．madeup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）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．Howtotakeaplane22．（8分）"Bigtobacco"iswhatthebossesofseverallargetechnologyfirmshavestartedcallingFacebook．Beingcomparedtothetobaccogiantsisfarfrompraise，butitisnottheonlywide﹣spreadanalogy（比拟）．AlowerblowisthesuggestionthatFacebookmaybecomelikeYahoo，theoncehigh﹣flyinginternetfirmthatfell．Evenayearagotheideawouldhavebeenunthinkable．ButsinceJanuaryFacebookhasbecometrappedinaseriesofmisjudgmentsandmissteps．ItbecameclearthatithaddonetoolittletostopRussianinterference（干涉）inAmerica'selectionin2016．Ithadtoadmitthatithadsharedthepersonaldataof90muserswithoutsidefirmswithoutpermission．ThecomparisontoYahooisimperfect．EvenatitspeakYahoo'sbusinesswasneveraslargeandprofitableasFacebook's．OneofthemainreasonsYahoodeclinedisbecauseitlostouttoapowerfulcompetitor，Google，inonlinesearch；MarissaMayer，itsbossfrom2012untilitssaletoVerizonlastyear，wasunabletorestoreadvertisers'oremployees'confidenceasusersleft．ButpeoplewhowatchedYahoo'sfallingseesimilarities．Executive（主管）turnoverwasaleadingindicatorofitsdecline；beforeMs．MayerwashiredYahoowentthroughfourchiefexecutivesinthreeyears．Mr．Zuckerberg，whocontrolsthemajorityofFacebook'svotingshares，isnotleaving，butmanytopexecutivesare．Thisyearseveralhaveannouncedtheirdepartures，includingFacebook'schiefsecurityofficer．Whenadvertisers'faithinFacebookhasbeenshaken，politiciansinWashingtonarerunningoutofpatiencewiththecompany．Lawmakers'inspectionofthefirmiscausingittobemorecautiousabouthowitusesdatafortargetingadvertisementsandaboutwhatinformationitmakesavailabletooutsiders．Mr．ZuckerbergandMs．SandbergareunderpressuretoprovetoemployeesandadvertisersthatFacebookisnotonlytrustworthybutworthyoftheirtimeandmoney．Iftheycannotdoso，andthecompany'ssharepricecontinuesitsslide，itispossiblethatMs．Sandbergwillbereplacedinthenextyear．Mr．ZuckerbergwilldoubtlesshavethoughtsaboutYahoo'ssorrytale．1、ForFacebook，beingcomparedto"bigtobacco"is．A．positiveB．ambitiousC．creativeD．negative2、Accordingtotheauthor，whatdoesFacebookcurrentlyhaveincommonwiththefailedYahoo？A．Lettingoutusers'data．B．Beingdeepinfinancialcrisis．C．Leadersareleavingthecompany．D．Layingoffalargenumberofemployees．3、TheauthortriestosupporthisjudgmentaboutFacebookby．A．questioningitsmanagementB．usingevidencerelatedtoitC．analyzingitsfinancialdataD．listingitsadvantagesanddisadvantages4、Whatisthemainideaofthepassage？A．Facebookgetstrappedintrouble．B．Twocompaniesaredeepincrisis．C．HowtosaveFacebook．D．Faithismorevaluablethangold．23．（8分）Ifyoumakealistoftheworld’stoptenmostchallengingjobs,chancesarethatbeingateacherwillnotmakethecut.Butthinkaboutthediscouragingtaskmillionsofeducatorsfaceeachdayastheytrytoshapeagroupofoftenbad-tempered,wildkidsintointelligent,well-roundedindividuals.Thatsurelyhastobethetoughestjobintheworld,especiallygiventhatthereisnopromotionorbonusawaitingthemeveniftheyarewildlysuccessful!Whatiftheseall-importantindividualsthatweoftentakeforgranteddisappearfromourlives?ThatwaswhatProjectEdandParticipantMedia’sTeachcampaignaskedfilmmakersofallagestoimagineintheirrecently-heldcompetition.Entitled“AWorldWithoutTeachers”,itspurposewastoinspiremoreyoungpeopletobecometeachers.However,the62amazingvideosubmissionsalsoserveasareminderofhowhorriblethingswouldbeifwedidn’thavetheseselflessindividualsguidingusthroughlife.Whatwasinterestingisthateventheyoungestparticipantsdidnotappeartobehappyattheideaofnothavinganybodytellingthemwhattodo.High-schoolstudentSavannahWakefieldreflectedifartasweknowittodaywouldhavebeendifferentwithoutteachers.WouldMonethavediscoveredhistalentforimpressionism?LosAngeles-basedMilesHorst,whowonthe1000USDprizeforthebestadultsubmissionimaginesaworldwhereteachersarereplacedbya“brainbox”inhisfunlivelyentry.YouthcategorywinnerMarinaBarham’svideorepresentsafactweallknowbutoftenforget.Teachersdon’tjustteach,theyinspire—somethingthatnoelectronicdevice,nomatterhowsmart,cando!Sothenexttimeyouthinkyourteacherisbeing“mean”fortryingtochannelyouintherightdirection,imaginealifewithouthim/her.Wehaveafeelingitwillnotappearasrosy!1、Whatisthetextmainlyabout?A．Thesignificanceofteachers.B．Thecampaigntopromoteteachers’status.C．Asurveyofpeople’sviewsaboutteachers.D．Acompetitiontowintheprizeforthebestteacher.2、Fromthepassagewecanlearnthat.A．teachingnaughtykidsisaverydiscouragingtaskB．beingateacherisoneofthemostchallengingjobsintheworldC．asuccessfulteacherhasthegreatestchancetobepromotedD．teachershavelittleinfluenceonkids’individualdevelopment3、Whatisthepurposeoftheproject“AWorldWithoutTeachers”?A．Toattractkidstosubmitmorevideosoftheirteachers.B．Toencouragemorepeopletogointoteachingcareer.C．Toexpectteacherstodevotethemselvestotheirjobs.D．Toremindstudentstoappreciateteachers’hardwork.4、WhatdoestheunderlinedsentenceinParagraph4suggest?A．Teachingisquitedifferentfromotherjobs.B．Thefutureofteachers’workappearsinspiring.C．Aworldwithoutteacherswillbeunimaginable.D．Manypeopleattachmoreimportancetoteaching.24．（8分）Iusedtobelievecourtesywasathingofthepast.VeryseldomhaveIencounteredacourteoushumanbeinginthismodernera.Recently,Ihadtochangemythinking,whenIcamefacetofacewithjustsuchahumanbeinginacoffeeplace,withmytwodaughters.Theplacewascrowdedasusualandwehadtoclimbsteepstairsinordertofindanemptytable.Afterenjoyingcoffeeandsnacks,wewentdownthenarrowstairs,wheretherewashardlyanyspaceforanotherpersontoeitherclimbuporcomedown.JustasIwasinthemiddleofthestairs,agentlemanenteredthemainentranceoftherestaurantwhichwasrightinfrontofthestaircase.IwassureIwouldbepushedroughlybythismangoingup.IkeptcomingdownasfastasIcould.Mydaughterswerealreadydown,lookingupatmeworriedly,hopingIwouldreachthembeforethestrangerstartedwalkingupthestairs,knowingIwasanervoussort.Nearlyreachingthem,Inoticedthemanstillstandingnearthedoor.Ireachedmydaughtersandpassedthestrangerattheentrancedoorwhichhekeptholdingopen.Ilookedbackthinkinghewasstillatthedoor,decidingwhethertogoinorfindanotherlesscrowdedplace.Isawhimgoingupthestairs,twoatatime.Itoldmydaughtersaboutitandallthreeofusfeltbadthatwedidnoteventhankthecourteousgentlemanwhowasactuallyholdingthedooropenforusladiestopassthroughbeforegoingup.Suchwellmanneredpeoplearehardtofindthesedays,whenpushingisverycommoninouradvancedbutaggressivesociety.Weapplaudedforhischivalry(骑士精神).1、Whatdidtheauthorthinkofthemanatthefirstsightofhim?A．Hewasinahurry.B．Hewouldwaitforher.C．Hewouldcrossherrudely.D．Hewasamanwithgoodmanners.2、Whydidtheauthor’sdaughtersworryabouther?A．Shewastoooldtowalkfast.B．Shewaseasytobedisturbed.C．Shetookuptoomuchspace.D．Shefocusedtoomuchontheman.3、WhatcanwelearnaboutthemanfromParagraph4?A．Hemightbeawaiterofthecafé.B．Hemighthaveanurgentbusinesstodo.C．Hefellinlovewithoneoftheauthor’sdaughters.D．Hewouldholdthedooropenforall.25．（10分）AteamofUniversityofWisconsin-Madisonresearchershasshownthatchronic(长期的)stressofbeingpoor,lackingcareandphysicalabuseinearlylifemayshrinkthepartsofachild'sdevelopingbrainresponsibleformemory,learningandprocessingemotion.Whileearlylifestressalreadyhasbeenlinkedtoanxiety,heartdisease，cancerandalackofeducationalandemploymentsuccess,researchershavelongbeenseekingtounderstandwhatpartofthebrainisaffectedbystresssoastohelpguideinterventions(干预).SethPollak,co-leaderofthestudyandaUWprofessorofpsychology,saystheresearchfocusedontwobrainareas—thehippocampus(HC:海马体)andamygdale(AG:杏仁体).Forthestudy,Pollack’steamhad128childrenaroundage12anddividedthemintofourgroupsafterinterviewswiththechildrenandtheircaregivers，documentingbehavioralproblemsandtheiraccumulatedlifestress.Onegrouphadexperiencedphysicalabuse,anothergroupwasignoredbeforebeingadoptedfromaforeigncountry,andathirdgroupcamefromlow-incomefamilies.Thefourthgroupofchildrencamefrommiddle-classfamiliesandhadnotexperiencedanyofthethreetypesofchronicearlystress.ResearchersdidMRIscans(核磁共振扫描)ofthechildren'sbrains,focusingontheHCandAG.Thentheypainstakinglytrackedthoseareasofthebrainbyhandonpaper.Thehandmeasurementsshowedthatchildrenwhohadexperiencedpoverty,neglectorphysicalabusehadasmallerACandHCthanthechildrenfrommiddle-classfamilies."Ithinkweaddedsomethingsolidtotheliterature,"hesaid."Ourresearchmayinformsocialpolicyandprofessionalinterventionstohelpthechildrenwhoaresuffering."1、Theresearchshowsthat.A．long-termpovertyruinsone'smemoryB．earlystresshurtsthedevelopmentofbrainC．earlylifeplaysavitalroleinone'slifeD．physicalabuseaffectsachild'slearningcompetence2、Whatcanweknowfromthepassage?A．HCandAGareinvolvedinmemory,learningandprocessingemotion.B．Thefinalgoaloftheresearchistofindoutwhatisaffectedbystress.C．Pollack'steamhasalreadyknownhowthebrainisaffected.D．Childreninthefourgroupsallsufferalotintheirlife.3、Howcantheresearchhelpthechildrenrelated?A．Bydevelopingnewmedicine.m"B．Bycreatingabetterlivingenvironment.C．Bygivingprocessionalmedicalcareforthechildren.D．Byofferingadviceonpolicymakingandprofessionalassistance.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）TheGiftattheParkingLotIneverthoughtIwouldbewritingaboutatriptotheconveniencestore.Itwasjustamonthaftermygrandmotherhad1andIdiduselessthingshopingtofilltheholeinmyheartandmakemeforgetthepain.Inthestore,IwasupsetbecauseIcouldn'tevenremember2IwenttheretobuysoIendedupbuyingsomething3.AsIwalkedoutofthestoretogetmycar,Iwas4angryateverythingthatwasgoingonaroundme,whichwasavery5feelingatthattime.Feeling6,mybeliefinGodwasbeginningtofade.Suddenly,awomandrivingrightbymysiderolleddownher7.“Excuseme,excuseme.”shesaidloudly.8shewasgoingtoaskformyparkingspot,I9pointedtomycar.“No,excuseme,”shesaidagain.Atthispoint,IfeltIhadno10buttoseewhatthis11ladywanted.AsIgotcloser,Irealizedthatshewas12somethinginherbag.Surprisingly,Iwasovercomewithasenseofreliefwhileotherswouldbe13inthissituation.Finally,she14meabooklet(小册子),whichread“WhatHopeforDeadLovedOnes?”“Maybeyouneedthis,”shesaidcalmly15awarmsmileonherface.However,16Icouldthankher,shewasgone.Ifeltasenseof17asIopenedthefirstpage.It18howpeoplepasson,buttheirspirit19withus.ThiswasthefirsttimesincemygrandmahaddiedthatIhadfeltherwithmeandIbegantofeelhopeagain.Itwasaunique20.And,I'llrememberitfortherestofmylife.1、A．comebackB．passedawayC．brokendownD．fallenover2、A．whatB．whyC．howD．when3、A．bychanceB．inhandC．atrandomD．onpurpose4、A．stillB．evenC．yetD．also5、A．commonB．unbearableC．curiousD．awkward6、A．breathlessB．hopelessC．aimlessD．helpless7、A．carB．doorC．windowD．hand8、A．RecognizingB．WorryingC．AssumingD．Upsetting9、A．cautiouslyB．exactlyC．clumsilyD．simply10、A．choiceB．reasonC．destinationD．prejudice11、A．outgoingB．energeticC．determinedD．annoying12、A．puttingawayB．lookingintoC．searchingforD．goingover13、A．excitedB．nervousC．comfortableD．moved14、A．offeredB．showedC．broughtD．handed15、A．withB．inC．onD．of16、A．afterB．onceC．asD．before17、A．comfortB．satisfactionC．inspirationD．surprise18、A．impliedB．explainedC．instructedD．directed19、A．catchesupB．fitsinC．sticksD．remains20、A．lessonB．memoryC．giftD．reward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）WhenIwasincollege,awhitecatoftenshoweduponourcampus.Itwasclear1．hewasastray(流浪的)catbecausehelookedthinandweak.Studentswouldplaywithhimafterclassandfeedhimallkindsoffood.Theschooldidn’tsayanythingaboutthecatfor2．longtime.Butoneday,we3．(tell)thatoneofourfellowstudentshadaninfectiousdiseaseandthatthecatwas4．(possible)thesource.Afterthat,wewerenotallowedtotouchanystray5．(animal)oncampus.Theschoolstartedtomakeeffortstokeepanimals6．campusaswell.Sincewewerenotallowedtofeedthewhitecat,itwashardforhimtofindfoodonthestreet.He7．(become)weakandskinny.Butwhiletherestofusignoredthecat,asecurityguardatourschooldecidedtotakeonthe8．(responsible)ofcaringforhim.Hetookthecattoavetforahealthcheck.Hethenwenttoanearbysupermarketandboughtfoodforthecat,aswellasasmallbedforhimtosleepin.Hemadesurethecatwashealthyand9．(comfort).Itmightseemlikeasmallefforttosomepeople.10．thismanriskedhisjob-hisonlysourceofincome-justtofeedatinycatwhonooneelsecaredfor.Itwasaveryheartwarmingthingtosee.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。Iwasusedtobeahealthygirl,butmorethantwoyearsago,Igetintothehabitofeatingalotofjunkfoodandsnacks、Inaddition,Ispentalotoftimelayonthesofa,watchingTV,anddoinglittleexercise、Asaresult,IputonsuchmuchweightthatIfounddifficulttoclimbthestairs、SoIdecidedtochangemyunhealthylifestyle、Ibegantohaveabalancingandhealthydiet、Ialsotookpartinvarioussportsactivitysuchasswimming,skating,runningorplayingbasketball、Oneyearlate,Ibecameasfitasbefore、第二节书面表达（满分25分）29．（25分）假定你是李华，你得知你的英国笔友Jane经常不吃早餐，昨日因胃痛发作住院治疗。请根据以下要点提示，给她写封邮件，内容包括：1．陈述不吃早饭的危害；2．劝她养成健康的生活方式。注意：1．词数100左右；2．可适当增加细节，以使行文连贯。DearJane，______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Yours，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、C3、A4、D5、D6、D7、C8、D9、D10、D11、A12、C13、D14、C15、A16、B17、D18、B19、D20、A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、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-dollartoolkitthatastronautHeidemarieStefanyshynPiperlo