2026届安徽合肥市高三英语第一学期期末综合测试试题含解析

2026届安徽合肥市高三英语第一学期期末综合测试试题注意事项：1．答卷前，考生务必将自己的姓名、准考证号、考场号和座位号填写在试题卷和答题卡上。用2B铅笔将试卷类型（B）填涂在答题卡相应位置上。将条形码粘贴在答题卡右上角"条形码粘贴处"。2．作答选择题时，选出每小题答案后，用2B铅笔把答题卡上对应题目选项的答案信息点涂黑；如需改动，用橡皮擦干净后，再选涂其他答案。答案不能答在试题卷上。3．非选择题必须用黑色字迹的钢笔或签字笔作答，答案必须写在答题卡各题目指定区域内相应位置上；如需改动，先划掉原来的答案，然后再写上新答案；不准使用铅笔和涂改液。不按以上要求作答无效。4．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．Asheworksinaremotearea,hevisitshisparentsonly_____A．anxiouslyB．occasionallyC．practicallyD．urgently2．Weworkduringtheweek，butweekendsandeveningsareusually________．A．vacant B．casual C．empty D．clear3．Jane’sgrandmotherhadwantedtowritechildren’sbookformanyyears,butonethingoranotheralwaysgotinway.A．a;不填 B．the;theC．不填;the D．a;the4．Wedidhaveaquarrelaboutmoneylastnight，butnowwehavealready_____________.A．takenup B．putupC．madeup D．broughtup5．Thewaitressattherestaurantwasusuallyveryconsiderate,butonthisoccasionsheseemedto________thediners.A．ignore B．identify C．applaud D．satisfy6．Don’tworry.Thehardworkthatyoudonow_____laterinlife.A．willberepaid B．wasbeingrepaidC．hasbeenrepaid D．wasrepaid7．Aftersevenhours’drive,theyreached______theythoughtwastheplacetheyhadbeendreamingof.A．that B．whatC．where D．which8．---Mom,Ihavepassedtheadmissionexaminations!---______!A．GoodforyouB．GoodluckC．CheerupD．Goahead9．Hewaselected______presidentofthecompany,and_____newscame,infact,as______surprise.A．a;the;X B．X;the;a C．a;X;the D．the;the;a10．Theteacheroftengiveshisstudentsabriefpauseinclass______theycantakeinwhathehastaught.A．why B．when C．who D．which11．Peopletendtoloveagriculturalproducts________withouttheuseoffertilizers,pesticidesorchemicaladditives.A．growing B．grownC．beinggrown D．havingbeengrown12．.IwasembarrassedtoadmitthatyesterdayI______aseriouserror.A．acted B．committed C．performed D．completed13．ItwasluckythatlittleJackwasnotathomewhenthefirebrokeout；otherwise，hehislife．A．hadlost B．wouldlose C．wouldhavelost D．mightlose14．—Iamsogladtofindyouathome.Canyoudomeafavor?—Sure._______?A．Whynot B．What’supC．Howcome D．Howisitgoing15．“MadeinChina2025”aimstotransformChinafromaproduct-makingfactoryintoaproduct-makingpower,______________drivenbyinnovationandemphasizingqualityoverquantity.A．theonethat B．onethatC．one D．theone16．Theimportance______anationaldayandhowitiscelebratedareverydifferentfromcountrytocountry.A．connectedto B．givento C．meaningto D．attachedto17．Thefirstsnowdidn’tfalluntilFebruaryinourprovincethisyear,________wasunexpected.A．it B．which C．that D．what18．Lonelinessisafeeling_______peopleexperienceapowerfulrushofemptinessandsolitude.A．which B．where C．that D．how19．HeletmewritedownhisinstructionssurethatIwouldknowwhatwasafterhewentaway.A．making;doingB．making;todoC．tomake;todoD．tomake;tobedone20．---Mum,canyoutellmewhysomeparentssendtheirchildrentostudyabroadataveryyoungage?---__________,darling.Ihaveneverthoughtaboutit.A．YouhavegotmethereB．TakeyourtimeC．YoubetD．Don’tbesilly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）Inawinforliteraryfictionamiddecliningsales,SallyRooney'snovelNormalPeoplehasbeennamedWaterstonesbookoftheyearin2018.Rooney'ssecondnovel,whichfollowstwoyoungpeoplefallinginloveinIreland,hassold41,000copiesinhardbackintheUKsinceitwasreleasedinAugust-fivetimesthehardbacksalesofher2017debut,ConversationsWithFriends.At27,Rooneyisnowtheyoungestwinneroftheaward,whichisgivenbytheUK'sbiggestbookshopchain,Waterstones.NormalPeoplereceivedalmostuniversalapplauseuponitsrelease.LonglistedfortheManBookerprize,thebookwonnoveloftheyearattheAnPostIrishbookawardsinNovemberof2018andhasalsobeenshortlistedfortheCostanoveloftheyear,announcedinJanuaryof2019.ThereaderresponsetoNormalPeoplehadbeenastonishing.Aswellastheuniversalpraise,ithasbeenahugeword-of-mouth(口头的)hit.There'recustomersreturningtobuymultiplecopiesasgifts.NormalPeoplestrengthenedSallyRooney'sreputationasthevoiceofhergenerationandoneofthemostexcitingnovelistsaroundtoday.Itssuccessisatestamenttothehealthofliteraryfictionandindicatesthatthereisstillsignificantappetiteforexcellentstorytelling.Theaward,establishedin2012,tendstogotobooksthatarealreadybestsellersnearChristmas.IthaspreviouslybeenwonbythelateAmericanauthorJohnWilliams'sStoner,thecookbookPolpobyRussellNorman,andlastyear'schoice,PhilipPullman'sLaBelleSauvage.JamesDaunt,Waterstones'managingdirector,saidRooney'swinwasasignofthehealthystateofliteraryfiction,whichhasseensalesdecreaseoverthelastdecade."Wearedelightedtonameitourbookoftheyear,"hesaid.1、Whatdoweknowaboutthecurrentsituationofliteraryfiction?A．ItsellswellinWaterstones.B．Itdoesn'tenjoypopularity.C．Itmainlytellslovestories.D．Itisabigwinnerin2018.2、WhatcanweinferaboutNormalPeople?A．ItwasBritain'smostpopularbookin2018.B．Itwondifferentawardsinalotofcountries.C．Itreceivedpraisesoonafteritwaspublished.D．Itmadeitsauthorthevoiceofyoungpeople.3、Theunderlinedword"testament"isclosestinmeaningto"".A．examination B．evidenceC．concern D．statement4、WhatisthemainfunctionofParagraph5?A．Toattractreaders'attention.B．TointroduceotherprizewinnersC．Toserveasbackgroundinformation.D．TocompareSally'snovelwithotherbooks.22．（8分）Thenextgenerationofartificialintelligence(AI)maybesittingrightbeneathyou,atleastiffurnituremakerIkeahasanysayinthematter.TheSwedishfurniturecompany’s“future-living”researchlabinCopenhagenisconductingasurveytounderstandwhatpeoplewantwhenitcomestosmartfurniture.AIisnowwalkingintomoreaspectsofpeople’sdailylives.Self-drivingcarsarejustaroundthecorner,andAIrobotscanplayandbeatthebestplayersofstrategygames.Assmarthometechnologieshavebecomemoreubiquitous,productsrangingfromsmartelectricaloutlets（插座）tosmartsmokealarmsarefloodingthemarket.Therefore,it’snotsurprisingthatIkeawouldbemovinginthesamedirection.Exactlywhypeoplewouldwanttheirsofaorbedframetospeaktothen,tracktheirdailymovementsorofferhelpisnotyetclear.ThoughIkea’sthenewsurveydoesn’tdirectlyanswerthatquestion,itdoesprovideahintofwhatpeoplewouldfeelcomfortablewith.Mostparticipantswantedamorehuman0likeformofvirtual（虚拟的）assistants,asopposedtoonethatismorerobotic.Intermsoftheidealgender（性别）oftheassistants,themostpopularchoicewasneithermalenorfemale.FewwantedareligiousformofAI.Justaswithhumanfriends,mostwantedAIfriendsthatwerelikethem,affirmingtheirownworldview.TheywantedanAIassistantthatwasreasonablyintelligent-thatcouldcollectdatatopredictwhatapersonwantedbeforeheorsheasked,andthatcouldpreventsomeonefrommakingmistakes.ThisisnotthefirsttimethatIkeahassetfootinthefieldorfuturistictechnologies.Inadditiontowirelesschargingtablesandchainlessbikesthatneverrust（生锈）,thefurnituregianthasalsopicturedsmartkitchensthatcancookthebestmeal.Todecideonhowintelligentyouwantyournextsofaorbookshelftobe,youcantakeIkea’ssurveyonline.1、Whatdoestheunderlinedword“ubiquitous”inParagraph2mean?A．Beautiful.B．Common.C．Normal.D．Environment.2、WhatdoesParagraph3mainlytalkabout?A．Thedifferencesbetweenrobot-likeandhuman-likeassistants.B．WhatformofAIassistantspeoplewant.C．Whatkindoffriendspeoplewant.D．Thepopularrobotsonthemarket.3、MostpeoplewhoreceivedthesurveywantedanAIassistantthatcould________.A．helpthembecamesmarterB．communicatewiththemwithouttroublesC．haveitsownworldviewD．dealwiththeirproblemsinadvance4、WhichofthefollowingproductsarefromIkea?A．Smartsofasthatcanspeaktoyou.B．Smartbedsthancantrackyourdailymovements.C．Wirelesschargingcars.D．Rustlessbikeswithoutchains.23．（8分）TheflowersarebloomingandthebirdsaresingingasMelindasitsintherosegardenofthenursinghome.Sheisrecallingoldtimesasshewaitsforherfamily'sarrival.ThenursinghomehasbeenMelinda'snewsettlementeversinceThomaspassedawayaweekago.Thomashadfoughtalongandhardbattleagainstlungcancerforthreeyears.Unfortunately,hehasbrokenthepromisethatheandMelindahadmade:tobewitheachotherforeverybirthday.Melindaknewthiswasunrealistic(不现实的)butagreedtothepromiseforThomas'ssake."Thomas,youarecompletelyadreamer"MelindashoutedtoThomasashedraggedonaboutlivingonanislandwithhisbeautifulwife.That'swhatshelovedabouthimmost-hehadavividimagination.Theygotmarriedatageeighteenandbeganhavingchildrenrightaway.Marycamewithintheyear,followedbyThomasBenjaminII,Lilly-Ann,andJoseph"LittleJoey"George.Thefamilylivedanexultantlifefilledwithlaughterandlove."Mom!"Lillyshouted,butitreallysoundedlikeahowl.Melindahadlostherselfinthinkingaboutthelifeshehadsharedwithherlatehusband.Lillypushedherdownthelongdarkhallsofthenursinghomeuntiltheyarrivedattherecreationalroom.Whenthedoorsopened,Melindaputherhandoverhermouthandwascompletelyspeechless.Theroomwascrowdedwiththepeoplenearestanddearesttoherandthewarmthandlovewasfeltinstantly.Thenightwenton;storiesandcocktailsweresharedandeverythingwasperfect.However,whenMelindacaughtamomenttoherselfshelookedaroundatherfamily.Withasmileonherface,sheraisedherManhattanandcalledoutforatoast."Thisoneisforyou,Thomas,thoughyouarenothere."1、WhydidThomasbreakhispromise?A．Hewasbusywithhiswork. B．Hediedoflungcancer.C．Hehadtoserveinthearmy. D．HestoppedlovingMelinda.2、Whichofthefollowingbestexplains"exultant"underlinedinParagraph2?A．Peaceful. B．Simple. C．Stressful. D．Happy.3、Whatcanweinferfromthelastparagraph?A．Melinda'childrenforgottheirfather. B．Melindawastiredofnoise.C．Melindamissedherhusbandbadly. D．Melindalikedtodrinkalcohol.4、Whatcanbeasuitabletitleforthetext?A．AParticularBirthday B．AWomanataNursingHomeC．MemoriesofOldDays D．ABigSurpriseforMelinda24．（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．Howtotakeaplane25．（10分）Doyouliveinacitywherelookinguptheairqualityforecastisjustasimportantascheckingtheweatherforecastfortheday?Manyplacesaroundtheworldhaveterriblepollutionproblems.Butnownewresearchsuggeststhatwemightbeabletoprotectourselves，naturallyandeasily—simplybytakingvitaminB．Thestudywasconductedbyateamofinternationalresearchers.TheirfocuswasonapollutantknownasPM2.5.Itssize,approximatelyl/40ththewidthofahumanhair,makesitparticularlydangerousbecauseitisreadilyinhaledandsmallenoughtospreadthroughthebodyviatheblood.ThiscancausedamagetothelungsifPM2.5isbeingbreathedinregularly.Thecurrentexperimentinvolvedsubjectsbeingexposedtocleanairandaplacebo(安慰剂)torecordbaselineresponses.Theyweregiventheplaceboforfourweeks,thenexposedthroughafacemasktoairfromahighlypollutedareaindowntownToronto.Theresearchersmeasuredmethylation(甲基化)changestoDNA;thedamageincreasedineachparticipant.However,intherepeatedexperiment,whenthevolunteersweregivenavitaminsupplementcontaining1milligramofvitaminB12,50mgofvitaminB6,and2.5mgoffolicaciddailyforfourweeks,itreducedthedamagetotheDNAbyarangeof28to76percent.TheresultsindicatehowpreventionatanindividuallevelcouldbeusedtofighttheharmfuleffectsofPM2.5.However,researchersstressedthatresearchwasinitsearlystages.Futurestudies,especiallyinheavilypollutedareas,areurgentlyneededandthey’llfinallydeveloppreventivemeasuresusingBvitaminstopreventthehealtheffectsofairpollution.1、Whatdoestheunderlinedword“inhaled”inParagraph1referto?A．breathed.B．smelt.C．approached.D．discovered.2、Howdoestheauthorintroducethecurrentexperiment?A．Byanalyzingcauses.B．Bygivingexamples.C．Bymakingcomparisons.D．Bydescribingeffects.3、Whatcanwelearnabouttheresearchersinthelastparagraph?A．Theywarnedpeopleofheavypollution.B．Theyregrettednotusingenoughvolunteers.C．They’llsoonfindmorewaystotestBvitamins.D．They’llconfirmthefindingsinhighlypollutedareas.4、Whatcanbethebesttitleofthetext?A．PM2.5IsMostDeadlyB．VitaminBBenefitsPeopleMostC．VitaminBOffersAirPollutionProtectionD．AirQualityForecastIsExtremelyImportant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）WhenIwas17，Ireadaquotethatwentsomethinglike：“Ifyouliveeachdayasifitwereyourlast，somedayyou’11mostcertainlyberight．”Itmadeadeep1onme．andsincethen,forthepast33years，Ihave2inthemirroreverymorningandaskedmyself：“Iftodaywerethelastdayofmylife，3IwanttodowhatIamabouttodotoday?”Andwhenevertheanswerhasbeen“No”fortoomanydaysina4，IknowIneedtochangesomething．RememberingthatI’llbe5soonisthemostimportanttoolI’veeverknowntohelpmemakethebig6inlifebecausealmosteverythingfallsawayinthefaceofdeath，7onlywhatistrulyimportantAboutayearagoIwas8withcancer.Mydoctorevenadvisedmetogohomeandgetmyaffairs9order，whichisadoctor’swayoftellingpeopletopreparetodie．I10withthatdiagnosisallday．11，atlastanadvancedtestshowedthatitwasaveryrarecancerthatis12withsurgery．IhadthesurgeryandI’mfinenow.13wantstodie．Evenpeoplewhowanttogotoheavendon’twanttodietogetthereAndyetdeathisthedestinationweall14．Noonehaseverescapedit.Andthatisasitshouldbe，becausedeathisverylikelythesinglebestinventionof15．Itislife'schangeagent.Itclearsouttheoldto16forthenew．Rightnowthenewisyou,butsomedaynottoo17fromnow，youwillgraduallybecometheoldandbeclearedaway．Sorrytobesodramatic，butitisquitetrue．Yourtimeis18，sodon’twasteitlivingsomeoneelse’slife．Don’tbe19bydogma(教条)—whichislivingwiththeresultsofotherpeople’sthinking．Don’tletthenoiseofothers’opinionsdrownoutyourowninner20．Andmostimportantly，havethecouragetofollowyourheart1、A．impression B．curse C．decision D．joke2、A．seen B．looked C．found D．1ost3、A．would B．should C．might D．could4、A．hurry B．1ine C．moment D．row5、A．successful B．rich C．dead D．frustrated6、A．apologies B．fortune C．impressions D．choices7、A．proving B．leaving C．confirming D．telling8、A．diagnosed B．cured C．treated D．round9、A．on B．for C．in D．at10、A．met B．got C．did D．1ived11、A．However B．But C．Therefore D．So12、A．incurable B．curable C．fatal D．changeable13、A．Anyone B．Someone C．Noone D．Everyone14、A．want B．avoid C．share D．escape15、A．destination B．1ife C．science D．disease16、A．makeup B．makefor C．makeour D．makeway17、A．distant B．short C．long D．away18、A．1imited B．rare C．enough D．1ost19、A．wasted B．cheated C．excited D．trapped20、A．voice B．love C．direction D．confusion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）TraditionalChineseMedicine(TCM)wasn’tfullyacceptedoutsideofChinaforcenturies.TherewasonceaChinesemanintheUSwho1．(accuse)afterheusedacertainformofTCMtreatment2．(cure)hisgrandson’sdisease.Inthelast10yearsorso,however,TCM3．(get)morepopularallovertheworld.Areport4．(publish)onDec.6saysthisstyleofhealthcare,whichincludesdifferentforms5．herbalmedicineandexercise,hasspreadto183countriesandregions.Forinstance,inLima,thecapitalofPeru,therearemorethan50Chinesemedicineclinics,about70percentof6．weresetupbylocaldoctors,TCMhasbecomepopularwiththepeopleofPeru.7．TCMhasbeenwidelyaccepted,itstillfaceschallenges.Forexample,thereistroubleinbeingabletoprove8．(exact)whatcertaindrugsaremadeupof,aswellasbeingabletokeeptheeffectsthesameeverytime.SomeresearchershavesuggestedTCMshouldbemoreexactandcometogetherwithWesternMedicine.“9．(bring)togetherWesternMedicineandTCM,ratherthanbeingin10．(compete),iswherethepotentialforgreateffectslies.第四部分写作（共两节）第一节短文改错（满分10分）28．（10分）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。Mr、Liismyheadteacher、Heisnowinhisthirtyandhasbeenteachinginalmosttenyears、Hehasmuchknowledgesandhisteachingmethodisscientific、Allofusenjoyhislessonswhicharelivelyandinterested、Notonlyishestrictandalsoheiskindandpatient、Asaresult,heispopularwithourstudents、Alltheseyearshehasdevotedtoteachinghisstudents、Inaddition,heoftengavehisencouragementtous,thatmeansalottous、Withhishelp,wehavemadeagreatprogress、Wealllovehim!第二节书面表达（满分25分）29．（25分）某中外合资企业在一家英文报上登了一则广告，招聘一名秘书。假如你叫李华，请根据下面的简历表用英语写一封求职信。姓名李华性别女身高1.61米出生年月1985.5婚否未婚身体状况健康毕业学校上海商学院其他：1.有三年工作经历；1.打字快，熟练计算机操作；3.擅长英语，懂一些德语；4.办事认真，待人诚恳，与人和睦相处。注意：1.词数：110左右，短文的开头和结尾已为你写好，不计入总词数；1．短文需包括表中所有要点，内容可适当发挥，以使行文连贯。3.参考词汇:ShanghaiCommercialCollegeDearsir，I'mwritingtoapplyforthepositionasasecretaryinyourcompany,whichIsawadvertisedintoday'spaper.IthinkIamfitforthejob._________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Sincerelyyours，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、D4、C5、A6、A7、B8、A9、B10、B11、B12、C13、C14、B15、C16、D17、B18、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、1、B2、C3、B4、C22、1、B2、B3、D4、D23、1、B2、D3、C4、A24、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.Themajorproblemwiththespacetrashisthatitmayhitworkingsatellitesanddamagetravelingspacecraft(飞船).Moreover,piecesofjunkmaycollide（碰撞）witheachotherandbreakintopieceswhichfallbacktotheEarth.Toavoidthis,scientistshaveinventedseveralwaysforclearingthesky.Groundstations