2025屆河北省教考聯(lián)盟高三一診考試英語試卷含解析

2025屆河北省教考聯(lián)盟高三一診考試英語試卷注意事項：1．答卷前，考生務必將自己的姓名、準考證號、考場號和座位號填寫在試題卷和答題卡上。用2B鉛筆將試卷類型（B）填涂在答題卡相應位置上。將條形碼粘貼在答題卡右上角"條形碼粘貼處"。2．作答選擇題時，選出每小題答案后，用2B鉛筆把答題卡上對應題目選項的答案信息點涂黑；如需改動，用橡皮擦干凈后，再選涂其他答案。答案不能答在試題卷上。3．非選擇題必須用黑色字跡的鋼筆或簽字筆作答，答案必須寫在答題卡各題目指定區(qū)域內相應位置上；如需改動，先劃掉原來的答案，然后再寫上新答案；不準使用鉛筆和涂改液。不按以上要求作答無效。4．考生必須保證答題卡的整潔。考試結束后，請將本試卷和答題卡一并交回。第一部分（共20小題，每小題1.5分，滿分30分）1．Sheisquite________toofficework.Youhadbetterofferhersomesuggestionswhennecessary.A．familiar B．similarC．fresh D．sensitive2．JamesSmithandhisgirlfriendwenttoChenyiSquaretocelebratetheNewYear,never_________.A．returned B．toreturnC．returning D．havingreturned3．FortheChinesedream______atanearlierdate,wemustacceleratethepaceofreformandopeningup.A．beingrealized B．torealizeC．realizing D．toberealized4．________someleadersandscientistshavepraisedChina’sachievementinspacetechnology,othersregardChina’sprogressasathreat.A．Unless B．OnceC．Eventhough D．Nowthat5．______hewas12,Einsteinhadlearnedadvancedmathematicsbyhimself.A．ThefirsttimeB．AtthetimeC．BythetimeD．Duringthetime6．Topgraduatesfromuniversitiesare________bymajorcompanies.A．chased B．registeredC．offered D．compromised7．Ilikesuchhouseswithbeautifulgardensinfront,butIdon’thaveenoughmoneytobuy.A．it B．one C．that D．this8．IamsorryIamverybusynow.IfItime,Iwouldcertainlygotothemovieswithyou.A．have B．hadC．havehad D．hadhad9．Bythesideoftheteachingbuildingofourschool_____,whichwascompletedin2009. A．therestandingthelibrary B．doesthelibrarystand C．thelibrarystands D．standsthelibrary10．Aquickreviewofsuccessesandfailuresattheendofyearwillhelp________youyearahead.A．sharpen B．switchC．stretch D．shape11．IfJoe’swifewon’tgototheparty,________.A．hewilleither B．neitherwillheC．heneitherwill D．eitherhewill12．Ifit_____earlier,theprintingmachinewouldnothavebrokendown．A．hasbeenrepaired B．isrepairedC．hadbeenrepaired D．wasrepaired13．Uptillnow,therehasbeennoscientificevidenceabout________causedthedeathofdinosaurs.A．whatisitthat B．whatitwasthat C．itwaswhat D．whatisit14．WhileworkinginKunming,hecheckedtheweathereachmorningformonths________herealizeditwouldbethesameeveryday.A．whenB．afterC．beforeD．since15．Takingdrugshasbecomepartofeverysport_________athletesseektoachievebeyondtheirnaturallimits.A．which B．that C．who D．where16．Bob’slecturescoveredafairlywiderangeandIcan’tsumupwhathesaysinafewsentences.A．covered B．conveyed C．considered D．commanded17．—______yousinganddanceatthislatehourofthenight?—Sorry,Iwillstoprightnow.A．May B．ShallC．Will D．Must18．Ifit________forhergreathelpthen,IwouldnotstudyEnglishsowellnow.A．hasn’tbeen B．wasn’tC．hadn’tbeen D．isn’t19．Don’trefertothedictionaryeverytimeyoucomeacrossanewwordassometimesitsmeaningmaybe_______clearlyinagivencontext.A．pickedout B．ruledout C．broughtout D．takenout20．Membershipofthisclubisopentothosewhoareitsaim.A．insalutetoB．inhonourofC．inlinewithD．insympathywith第二部分閱讀理解（滿分40分）閱讀下列短文，從每題所給的A、B、C、D四個選項中，選出最佳選項。21．（6分）Dreamingofsummerpicnicsfilledwithfamilyandfun?We’vecomeupwith4ofthetoppicnicareasacrosstheUS.CumberlandIslands,GeorgiaJustafewhourssouthofSavannah,thisnationalseashoreisapicnicparadise.It’sanunspoiledplaceintheDeepSouthwithover50milesofhikingtrails(小徑).CoveredinSpanishmoss,thetrailsarelinedwithtreesandsinceit’sstillaruralarea,thestarslineupforaspectacularshowatnightandcreatetheperfecteveningstarlitpicnicopportunity.GrantPark,ChicagoIfyouarelookingfordeliciousfoodinChicago,goforatasteofa20-day,lake-front,foodiefestivalthathappensinOctobereachyear.Grabaspotnearthefountaintoenjoyyourpicnic,appreciatethecitysceneryandlakeviewsandrelaxwithfamilyandfriends.IfyouarethereonJuly4th,besuretoplanthedaytoincludethefireworksdisplayattheNavyPier.CranberryIslands,MaineHere,you’llenjoynaturalpicnicswithislandviews.Theislandsareadelightfulgroupofislandsabout20minutesoffshorefromAcadiaNationalPark.Youcanvisittheislandsbyprivateboatorferry(渡船)service.Bringapicnicbasketalongfortherideasit’saromanticpicnicareatotakeyourspecialsomeoneorgoforafamilyoutingtovisittheislands.BigSur,CaliforniaThePointLobosStateReserveisasmallgem.Besidesthecoastalwildlifetherearerareplantcommunities,anduniquegeologicalformations.It’sgoodtohaveapicnicthere.Werecommendbringingatelescope,becausemuchofthewildlifecanbeseenonlyatadistance.1、WhatareCumberlandIslandslike?A．TheyarejustnexttoSavannah.B．Theyhaven’tlosttheirnaturalness.C．TheyarealmostcoveredinSpanishmoss.D．Theyhaveaspectacularshoweverynight.2、Wherecanyouenjoyobservingwildlifewithatelescope?A．AttheNavyPier. B．IntheDeepSouth.C．AtAcadiaNationalPark. D．AtthePointLobosStateReserve.3、Whydoestheauthorwritethispassage?A．Tointroducesomepicnicareas.B．Tosharepersonalstoriesaboutpicnics.C．Totellreaderssomegoodwaystorelax.D．Toofferreaderstipsforwinterholiday.4、Wherecanwemostprobablyreadthispassage?A．Inapersonaldairy. B．Inasciencereport.C．Inatravelmagazine. D．Inageographytextbook.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（簡報）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）Theairwebreatheissofreelyavailablethatwetakeitforgranted.Yetwithoutitwecouldnotsurvivemorethanafewminutes.Forthemostpart,thesameairisavailabletoeveryone,andeveryoneneedsitSomepeopleusetheairtoliveonwhiletheysitaroundandfedsorryforthemselves.OthersbreatheintheairandusetheenergyitprovidestomakeamagnificentJifeforthemselves.Opportunityisthesameway.Itiseverywhere.Opportunityissofreelyavailablethatwetakeitforgranted.Yetopportunityaloneisnotenoughtocreatesuccess.Opportunitymustbeseizedandacteduponinordertohavevalue.Somanypeoplearesoanxiousto“getin”ona“groundflooropportunity”,asiftheopportunitywilldoallthework.Thatisimpossible.Justasyouneedairtobreathe,youneedopportunitytomakeit.Ittakesmorethanjustbreathinginthefreshairofopportunity,however.Youmustmakeuseofthatopportunity.Thatisnotuptotheopportunity.Thatisuptoyou.Itdoesn’tmatterwhat“floor”theopportunityison.Whatmattersiswhatyoudowithit.1、Whatisthepurposeofthefirstparagraph?A．Introducethetopicofthepassage.B．Compareairtoopportunity.C．Presenttherelationshipbetweenhumanandair.D．Toshowtheimportanceofair.2、Whichofthefollowingmaybeusedasthetittleofthepassage?A．AirandOpportunityB．SeizetheOpportunityC．HowtoSucceedD．BreathetheFreshAir3、Theauthorwantstoadviseusto______.A．breatheintheairB．sitaroundandfeelsorryC．beuptotheopportunityD．makeuseoftheopportunityandactonimmediately24．（8分）Forcenturies,medicalpioneershaverefinedavarietyofmethodsandmedicinestotreatsickness,injury,anddisability,enablingpeopletolivelongerandhealthierlives.“Asalamander(asmalllizard-likeanimal)cangrowbackitsleg.Whycan'tahumandothesame?”askedPeruvian-bornsurgeonDr.AnthonyAtalainarecentinterview.Thequestion,areferencetoworkaimingtogrownewlimbsforwoundedsoldiers,capturestheinventivespiritofregenerativemedicine.Thisinnovativefieldseekstoprovidepatientswithreplacementbodyparts.Thesepartsarenotmadeofsteel;theyaretherealthings---livingcells,tissue,andevenorgans.Regenerativemedicineisstillmostlyexperimental,withclinicalapplicationslimitedtoproceduressuchasgrowingsheetsofskinonburnsandwounds.Oneofitsmostsignificantadvancestookplacein499，whenaresearchgroupatNorthCarolina’sWakeForestInstituteforRegenerativeMedicineconductedasuccessfulorganreplacementwithalaboratory-grownbladder.Sincethen,theteam,ledbyDr.Atala,hascontinuedtogenerateavarietyofothertissuesandorgans—fromkidneystoears.Thefieldofregenerativemedicinebuildsonworkconductedintheearlytwentiethcenturywiththefirstsuccessfultransplantsofdonatedhumansofttissueandbone.However,donororgansarenotalwaysthebestoption.Firstofall,theyareinshortsupply,andmanypeoplediewhilewaitingforanavailableorgan;intheUnitedStatesalone,morethan100,000peoplearewaitingfororgantransplants.Secondly,apatient’sbodymayultimatelyrejectthetransplanteddonororgan.Anadvantageofregenerativemedicineisthatthetissuesaregrownfromapatient’sowncellsandwillnotberejectedbythebody’simmunesystem.Today,severallabsareworkingtocreatebioartificialbodyparts.ScientistsatColumbiaandYaleUniversitieshavegrownajawboneandalung.AttheUniversityofMinnesota,DorisTaylorhascreatedabeatingbioartificialratheart.Dr.Atala’smedicalteamhasreportedlong-termsuccesswithbioengineeredbladdersimplantedintoyoungpatientswithspinabifida(abirthdefectthatinvolvestheincompletedevelopmentofthespinalcord).AndattheUniversityofMichigan,H.DavidHumeshascreatedanartificialkidney.Sofar,thekidneyprocedurehasonlybeenusedsuccessfullywithsheep,butthereishopethatonedaysimilarkidneywillbeimplantableinahumanpatient.Thecontinuingresearchofscientistssuchasthesemayeventuallymakedonororgansunnecessaryand,asaresult,significantlyincreaseindividuals’chancesofsurvival.1、Inthelatestfieldofregenerativemedicine,whatarereplacementpartsmadeof?A．Donatedcells,tissuesandorgans. B．Rejectedcells,tissuesandorgans.C．Cells,tissuesandorgansofone’sown. D．Cells,tissuesandorgansmadeofsteel.2、Whathavescientistsexperimentedsuccessfullyonforabioartificialkidney?A．Patients B．RatsC．Sheep D．Soldiers3、Whyisgenerativemedicineconsideredinnovative?A．Itwillprovidepatientswithreplacementsofttissues.B．Itwillstrengthenthehumanbody’simmunesystem.C．Itwillshortenthetimepatientswaitingforadonatedorgan.D．Itwillmakepatientslivelongerwithbioartificialorgans.4、Whatisthewriter’sattitudetowardsregenerativemedicine？A．Positive. B．Negative.C．Doubtful. D．Reserved.25．（10分）Therewasalotofnewsrelatedtoartificialintelligence,orAI,andmachinelearning.Amongthestoriesweretwodealingwithdirectcompetitionsbetweenhumansandmachines.Inonecompetition,machinesthatusedAIperformedbetterthanhumanbeingsinahigh-levelreadingtest.Twonaturallanguageprocessingtoolsbeathumanintheexperiment.OneofthetoolswasbuiltbytheAmericantechnologycompanyMicrosoft.TheotherwascreatedbyChineseonlinesellerAlibabaGroup.Inanothercompetition,acomputertookonhumansinlive,publicdebates.TheeventdemonstratedhowAI-poweredcomputersareincreasinglybeingdevelopedtothink'andsoundlikehumans.Theorganizerofthedebates,U.S.technologycompanyIBM,announcedsplitresults.Itsaidamajorityofthosewatchingsaidtheyfeltthemachinehaddonemoretoimprovetheirknowledgeofthesubject.But,thehumangotmorepraiseforcommunicatingtheirideas.Thisyear,wealsoexploredthemanywaysAIandmachinelearningarenowbeingused.Forexample,someU.S.judgesusemachinelearningsystemstohelpthemdecidewhen,andforhowlong,criminalsshouldbejailed.Thesystemusescomputerstoexaminedatafromthousandsofcourtcases.Onefast-growingareaofAIisfacialrecognition,whichisincreasinglybeingusedforsecuritypurposes.Recently,Atlanta'sHartsfield-JacksonairportbecamethefirstintheU.s.topermitpassengerstousefacialrecognitiontechnologytogetonflights.AChinesecompanyshowedoffanAIsystemitdevelopedtorecognizeindividualsbybodyshapeandwalkingmovements.ThesystemisalreadybeingusedbyChinesepoliceinBeijingandShanghai.Inaddition,machinelearningwasusedduring2018topredictresultsoftheWorldCupsoccercompetition.Thetechnologyalsocreatedartworkthatsoldforalargeamountofmoney.Anditisbeingusedtohelpfarmersavetimeandmoney,whilereducingenvironment-harmingchemicals.Othertechnologysystemsarebeingusedtofollowfarmanimalsandwildlifetocollectinformationontheiractivities.1、Whywerethetwocompetitionsmentionedinthepassage?A．ToshowhowmuchbetterAIandmachinelearningarethanhumans.B．ToproveAIandmachineLearninggotmorepraiseforcommunication.C．ToshowhowpowerfulAIandmachineLearningare.D．ToproveAIandmachinelearninghavebeenusedintheworkofU.S.judges.2、Whatarefacialandbodyrecognitionsystemsusedforinthepassage?A．Knowledgelearning.B．Safetycontrol.C．Officeautomation.D．Trackingsurvey.3、Whatcanweinferfromthispassage?A．AIhasbeenwidelyusedineveryperson'sdailylife.B．HumancanbereplacedbyAIinfuturecompletely.C．MoreattentionisbeingpaidtoAIineverypartoftheworld.D．MoreadvancedAlishelpingpeopleinmoreandmoreareas.4、Whereisthetextprobablyfrom?A．Atechnologyreport.B．Anaturalsciencemagazine.C．Asciencefiction.D．Agovernmentdocument.第三部分語言知識運用（共兩節(jié)）第一節(jié)（每小題1.5分，滿分30分）閱讀下面短文，從短文后各題所給的A、B、C和D四個選項中，選出可以填入空白處的最佳選項．26．（30分）Barefootanddirty，thegirljustsatandwatchedthepeoplegoby．Shenevertriedtospeak．Manypeoplepassed，butneverdidonepersonstop．ThenextdayIdecidedtogobacktothepark，curioustoseeifthelittlegirlwouldstillbethere．Rightintheveryspotasshewasyesterday，shesatwiththesaddestlookinhereyes．TodayIwastomakemyownmoveandwalkovertothelittlegirl．Asweallknow，aparkfullofstrangepeopleisnotaplaceforyoungchildrentoplayalone．AsIbeganwalkingtowardsher，Icouldseethebackofthelittlegirl’sdressindicatedadeformity（畸形）．Ismiledtoletherknowitwasokay，Iwastheretohelp，totalk．Isatdownbesideherandopenedwithasimple“Hello”．Ismiledandsheshylysmiledback．Wetalkeduntildarknessfellandtheparkwascompletelyempty．Iaskedthegirlwhyshewassosad．Thelittlegirllookedatmeandwithasadfacesaid，“BecauseI’mdifferent．”Iimmediatelysaid“Thatyouare!”andsmiled．Thelittlegirlactedevensadder．Shesaid，“Iknow．”Shelookedatmeandsmiled．Slowlyshestoodtoherfeet，andsaid，“Really?”“Yes，dear，you’relikealittleguardianangelsenttowatchoverallthosepeoplewalkingby．”Shenoddedherhead“yes”andsmiled，andwiththatshespreadherwingsandsaidwithatwinkleinhereye，“Iam．I’myourguardianangel．”Iwasspeechless，sureIwasseeingthings．Shesaid，“Foronceyouthoughtofsomeoneotherthanyourself，myjobhereisdone．”ImmediatelyIstoodtomyfeetandsaid，“Wait，sowhydidnoonestoptohelpanangel!?”Shelookedatmeandsmiled，“You’retheonlyonewhocouldseeme，andyoubelieveitinyourheart．”…andshewasgone．Andwiththatmylifechangeddramatically．So，whenyouthink1，remember，yourangelisalwayswatchingoveryou．Mineis!1、Peoplejustpassedbythegirlbecause_______．A．theypretendednottoseeherB．shepretendedtobepoorC．theyneverthoughtofhelpingherD．theyknewtheauthorwouldhelpher2、Whichwordcan’tbeusedtodescribetheauthor?A．Considerate． B．Patient． C．Helpful． D．Powerful．3、Whywastheauthorspeechless?A．Hewasshocked． B．Hedidn’tmanagetohelpthegirl．C．Hethoughthewascheated． D．Hewasindespair．4、WhichofthefollowingstatementsisTRUE?A．Theauthorsmiledbecausehesawthegirlwasshy．B．Theauthorhadknownthatthegirlwasarealangel．C．Theauthorbelievedthatanangelwasalwayswatchinghim．D．Theauthordecidedtogobacktotheparkbecausehewassurethatthelittlegirlwouldbethere．5、Whatdoes“You’reallyouhave”mean?A．Youareugly． B．Youarealone．C．Youarestrong． D．Youarerich．第二節(jié)（每小題1.5分，滿分15分）閱讀下面材料，在空白處填入1個適當?shù)膯卧~或括號內單詞的正確形式。27．（15分）KiyotoSaitoistryingtochangepeople’sopinionofagriculturalworkthroughhisunusualattire(打扮).Whetherhe’sdrivingatractor1．isstandinginthefields,Kiyotoisalwayswearinganelegantsuit.Kiyoto’sfamilyhasbeenplantingriceforaround400years,butasateenagerhe2．(find)thetraditionboringandmovedtothecity.Hereturnedtohisnativetowntwoyearsago,3．(determine)togetinvolvedinthefamilybusiness.4．ideaofwearingasuitinthefieldsstartedasajoke.Oneday,hisbrotherjokedaboutfarminginanelegantsuit,butKyiototookit5．(serious).Heviewedtheideaastheperfectwaytochangepublicopinionofagriculturalwork.“Mostpeoplethinkoffarmers6．‘dirtyallday’.Iwantyoungsterstothink‘farminglooksfun’”hesaid.Atfirstnooneseemed7．(understand)him.Evenhisfamilywassurprisedbyhis8．(choose)offarmingattire.Hisgrandfatherworried9．(do)farmworkinasuitwouldbedangerous.NowKiyotoisfamousandhasbeeninvitedonvarioustelevisionshows.Healsohasablogwhereheregularly10．(post)hisfarmingexperiencesandphotosofhimselfalldressedup.第四部分寫作（共兩節(jié)）第一節(jié)短文改錯（滿分10分）28．（10分）IwaspleasedtohearfromyouandIamwrittentotellyousomethingaboutthechangesinmyschool.Youareright.Greatchangeshavebeentakenplaceinmyschool.Itisnotlongerwhatitusedtobethreeyearsago,whentherewereonlyoneteachingbuildingandaplayground.Iamhappytotellyoutwonewbuildingshadbeenbuiltandareonuse.Oneofthemisanewclassroombuilding,initthereareroomsformusic,artsandcomputerteaching.Theotherisalibrary,wherethereareallkindsofbooks,newspapersandmagazines.However,myschoolisgoodequippedwithsportsfacilitiesandmusicalinstruments.Thenumberofstudentshasalsogrownfrom1,500to2,500.What’smore,wehadplantedalotoftreesandflowersinandaroundtheschool.Ibelievemyschoolbecomebetterandbetter,andIhopeyouwillvisitmyschoolagain.第二節(jié)書面表達（滿分25分）29．（25分）假設你是李華，你的美國筆友Peter對中國春聯(lián)(SpringFestivalcouplets）產生了濃厚的興趣，來信向你了解中國的春聯(lián)文化。請你回信為他介紹春聯(lián)的用途、內容和寓意等。注意：1、詞數(shù)100左右。2、可以適當增加細節(jié)，以使行文連貫。DearPeter,_____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Yours,LiHua

參考答案第一部分（共20小題，每小題1.5分，滿分30分）1、C2、B3、D4、C5、C6、A7、B8、B9、D10、D11、B12、C13、B14、C15、D16、A17、D18、C19、C20、D第二部分閱讀理解（滿分40分）閱讀下列短文，從每題所給的A、B、C、D四個選項中，選出最佳選項。21、1、B2、D3、A4、C22、Spaceiswhereourfutureis—tripstotheMoon,Marsandbeyond.Mostpeoplewouldthinkthatasidefromcomets(彗星)andstars,thereislittleelseoutthere.But,sinceourspacejourneystartedwehaveleftsomuchtrash（垃圾）therethatscientistsarenowconcernedthatifwedon'tcleanitup,wemayallbeinmortal（致命的）danger.Thefirstpieceofspacejunkwascreatedin1964,whentheAmericansatelliteVanguardIstoppedoperatingandlostitsconnectionwiththegroundcenter.However,sinceitkeptorbitingaroundtheEarthwithoutanyconsequences,scientistsbecameincreasinglycomfortableabandoning（拋棄）thingsthatnolongerservedanyusefulpurposeinspace.Itisestimated（估計）thattherearenowover500,000piecesofman-madetrashorbitingtheEarthatspeedsofupto17,500milesperhour.Thejunkvariesfromtinypiecesofpaintchippedoffrocketstocameras,hugefueltanks,andevenodditemslikethemillion-dollartoolkitthatastronautHeidemarieStefanyshynPiperlostduringaspacewalk.Themajorproblemwiththespacetrashisthatitmayhitworkingsatellites