大学英语3试题库

一、HarvardUniversitynamedhistorianDrewGilpinFaustasitsfirstfemalepresidentonSunday,endingalengthyandsecretivesearchtofindasuccessor（接任者）toLawrenceSummers.Theseven-memberHarvardCorporationelectedFaust,anotedscholaronHistoryoftheAmericanSouthanddeanofHarvardJsRadcliffeInstituteforAdvancedStudy,astheuniversity's28thpresident."Thisisagreatday,andahistoricdayforHarvard."JamesR.Houghton,chairmanofthepresidentialsearchcommittee,saidinastatement.uDrewFaustisaninspiringandaccomplishedleader,asuperbscholar,adedicated（献身的）teacher,andawonderfulhumanbeing.”HerselectionisnoteworthygiventheheateddebatesoverSummers1commentsthatgeneticdifferencesbetweenthesexesmighthelpexplainthelackofwomenintopsciencejobs.FausthasbeendeanofRadcliffesince2001,twoyearsaftertheformerwomen'scollegewascombinedintotheuniversityasaresearchcenterwithamissiontostudygenderissues（性另U问题）.Someprofessorshavequietlygrousedthatthe371-year-olduniversityisappointingafifthpresidentwhoisnotascientist.NoscientisthashadthetopjobsinceJamesBryantConantretiredin1953;itslastfourhavecomefromthefieldsofclassics,law,literatureandeconomics.Faustisthefirst

HarvardpresidentwhodidnotreceiveadegreefromtheuniversitysinceCharlesChauncy,agraduateofCambridgeUniversity,whodiedinofficein1762.SheattendedtheUniversityofPennsylvania."Teachingstaffturnedtoherconstantly."saidSheldonHackney,aformerpresidentoftheUniversityofPennsylvaniaandhistorianwhoworkedcloselywithFaust."She'sveryclear.Shehasasenseofhumor,butshe'sverystrong-minded.Youcometotrustinherbecauseshe'ssosolid.”B、SheisafamousscholarfromtheAmericanSouth.2、LawrenceSummersheldtheviewthat.D、fewwomenmaketopscientistsowingtogenes3、Whichmightbethebesttitleforthepassage?A、Harvardnamedits1stfemalepresident.4、Thispassageprobablyappearsina.D、newspaperreport二、Tobeagoodteacher,youneedsomeofthegiftsofagoodactor;youmustbeabletoholdtheattentionandinterestofyourstudents;youmustbeaclearspeaker,withagood,strong,pleasingvoicewhichisfullyunderyoucontrol;andyoumustbeabletoactwhatyouareteaching,inordertomakeitsmeaningclear.Watchagoodteacher,andyouwillseethathe

doesnotmovemotionlessbeforehisclass;hestandsthewholetimeheisteaching;hewalksabout,usinghisarms,handsandfingerstohelphiminhisexplanation,andhisfacetoexpresshisfeeling.Listentohim,andyouwillheartheloudness,thequalityandmusicalnoteofhisvoicealwayschangingaccordingtowhatheistalkingabout.Thefactthatagoodteacherhassomeofthegiftsofagoodactordoesn'tmeanhewillindeedbeabletoactwellonthestage,forthereareveryimportantdifferencesbetweentheteacher'swordandtheactor's.Theactorhastospeakwordswhichhasbeenlearntbyheart,hehas1、Agoodteacher.A、knowshowtoholdtheinterestofhisstudents2^Inwhatwayisateacher,'sworkdifferentfromanactor''s?()hehastodealwithunexpectedsituations.Themaindifferencebetweenstudentsinclassandtheatreaudienceisthat().thestudentsmusttakepartintheirteachers'plays三、Youhavebeenbadlyinjuredinacaraccident.Itisnecessarytogiveyouabloodtransfusionbecauseyoulostagreatdealofbloodintheaccident.However,specialcaremustbetakeninselectingnewbloodforyou.Ifthebloodistoo

differentfromyourown,thetransfusioncouldkillyou.Therearefourbasictypesofblood:A,B,AB,and0.Asimpletestcanindicateaperson'sbloodtype,which,likehaircolorandheight,isinheritedfromparents.Becauseofsubstancescontainedineachtype,thefourgroupsmustbetransfusedcarefully.Basically,AandBcannotbemixed.AandBcannotreceiveAB,butABmayreceiveAorB.0cangivetoanyothergroup;hence,itisoftencalledtheuniversaldonor.Fortheoppositereason,ABissometimescalledtheuniversalrecipient.However,becausesomanyreactionscanoccurintransfusions,patientsusuallyreceiveonlysaltorplasma(liquid)untiltheir1、Agoodtitleforthispassageis.C、HumanBloodTypes2、Theword"hence"inline10meansC、therefore3、Inabloodtransfusion,itiseasiesttofindtheacceptabletypeofbloodforapersonwiththebloodtypeofC、ABThepurposeofusingsaltandplasmabeforeabloodtransfusionistoallowtime.

B、formatchingthebloodtobetransfusedwiththepatient'sbloodMostEuropeanshavebloodtypeC、0四Inancienttimesthemostimportantexaminationswerespoken,notwritten.IntheschoolsofancientGreeceandRome,testingusuallyconsistedofsayingpoetryaloudorgivingspeeches.IntheEuropeanuniversitiesoftheMiddleAges,studentswhowereworkingforadvanceddegreeshadtodiscussquestionsintheirFieldofstudywithpeoplewhohadmadeaspecialstudyofthesubject.Thiscustomexiststodayaspartoftheprocessoftestingcandidatesforthedoctor,sdegree.Generally,however,modernexaminationsarewritten.Thewrittenexamination,whereallstudentsaretestedonthesamequestions,wasprobablynotknownuntilthenineteenthcentury.PerhapsitcameintoexistencewiththegreatincreaseinpopulationandthedevIntheMiddleAgesstudentsD、neverwroteexamsThemainideaofparagraph 2isD、examinationsarenowwrittenandtimedThekindofexamwherestudentsmustselectanswersis.B、objectiveModernindustrymusthavedeveloped.C、aroundthe19thcenturyItmaybeconcludedthattesting.C、haschangedsincetheMiddleAges五Howcanasinglepostagestampbeworth$16800?Anymistakemadeintheprintingofastampraisesitsvaluetostampcollectors.Amistakeononeinexpensivepostagestamphasmadethestampworthamillionandahalftimesitsoriginalvalue.ThemistakewasmademorethanahundredyearsagointheBritishcolonyMauritius,asmallislandintheIndianOcean.In1847anorderforstampswassenttoaLondonprinter-Mauritiuswastobecomethefourthcountryintheworldtoissuestamps.Beforetheorderwasfilledanddelivered,aballwasplannedatMauritius'GovernmentHouse,andstampswereneededtosendouttheinvitations.Alocalprinterwasinstructedtocopy1、Apostagestamp'svaluetocollectorsisraisedif().C、amistakeismadeintheprinting2、Themistakeinthelocallyprintedpostagestampswasinthe().B、wordin3、$16800isthecollectorJsvalueof().C、theTwopennyBlue4、Whichoneisimpliedbutnotstated?D>Collectorsareconstantlylookingforstampswithmistakes.5、Thebesttitleforthissectionis()TheTwopennyBlue六、IntheUnitedStates,30percentoftheadultpopulationhasa"weightproblem”.Tomanypeople,thecauseisobvious:weeattoomuch.Butscientificevidencedoeslittletosupportthisidea.GoingbacktotheAmericaof1910,wefindthatpeoplewereleanerthantoday,yettheyatemorefood.Inthosedayspeopleworkedharderphysically,walkedmore,usedmachinesmuchless,anddidn'twatchTV.Severalmodernstudies,moreover,haveshownthatfatterpeopledonoteatmoreonaveragethanthinnerpeople.Infact,someinvestigations,suchasa1979studyof3,545Londonofficeworkers,reportthat,onbalance,fatpeopleeatlessthanslimmerpeople.Studiesshowthatslimpeoplearemoreactivethanfatpeople.AstudybyaresearchgroupatStanfordUniversityfoundthefollowinginterestingfact:Themorethemanran,thegreaterlossofbodyfat.Themoretheyran,thegreatertheirincreaseinfoodintake.Thus,thosewhoranthemostatethemost,yetlostthegreatestamountofbodyfat.WhatkindofphysicalproblemdomanyadultAmericanshave?C、TheyaretoofatBaseduponthestatisticsgiveninthearticle,supposethereare500adultAmericans,abouthowmanyofthemwillhaveaweightproblem*?D、150.3、Istherescientificevidencetosupportthateatingtoomuchisthecauseofa"weightproblem"?C、Thereishardlyanyscientificevidencetosupportthis.4、IncomparisonwiththeadultAmericanpopulationtoday,theAmericansof.A、atemorefoodandhadmorephysicalactivities5、Whathavemodernmedicalandscientificresearchesreportedtous?A、Fatpeopleeatlessfoodandarelessactive.七、Motorvehiclespoweredbytheinternalcombustionenginesareresponsibleforover80percentofthedeadlycarbonmonoxideaswellasthecancer-causingsubstancesintheair.Eighty-ninepercentofthevehiclesontheroadinMassachusettsareprivatelyownedandareoftenoperatedwithonlyonepersoninthecar.Ifpeoplewouldusepublictransportationinsteadoftheircars,airpollutionlevelscouldbesignificantlylowered.ThirtypercentofthelandindowntownBostonisdevotedtocars.Wheretherearegarages,therecouldbegardens.Wheretherearehighways,thereshouldbehomesandplacestoworkandplay.Studiesshowthatpeopletodayshowagreaterhearinglosswithagethaneverbefore.Muchofthisisduetocar-horns,loudenginesandgeneraltrafficnoise.Thecostofapersonalcarishightotheindividual.Theaveragepersonpaysabout$2,000percarperyearingasoline,insurance,taxes,andmaintenance.Butforsocietyasawhole,personalcarsarealuxurywecannotafford.Wepayindeathfromautoaccidents,inpoorhealthfromairpollution,inlossofhearingfromnoisepollution,andinthedestructionofourcitiesbytheever-increasingnumberofhighways.ItisthatarethemaincauseoftheairpollutioninBoston.D、personalmotorvehicles2、Itisimpliedbutnotstatedthat.CgarageshavereplacedmostofthegardensinBoston3、Accordingtothelastparagraph,.societyasawholesuffersmuchfromtheever-increasingnumberofcars4、ThewriterJspurposeinwritingthisarticleisto.urgepeopletouseprivatecarsaslessaspossible5^Thebesttitleforthispassageis".”PublicTransportation,ASolutiontoAirPollution

八、Moscow,Russia(Spacenews) "Thecomputerisabetterchessplayer,insistedViktorProzorov,theloser.Itseemedasifitwerelaughingaftereverygoodmove.IknowIshouldhavebeatenitforthesakeofmankind(人类)，butIjustcouldn'twin",heannouncedandshookhisheadsadly.Prozorovsdisappointmentwassharedbyseveralgrandmasterswhowerepresent,someofwhomweresoupsetthattheyshoutedatthemachine.Manychessplayerssaidthatthismeanttheendofchesschampionships(冠军)aroundtheworld,sincethefunhadbeentakenoutofthegame.Thecomputerwalked orrather rolledawaywith5000dollarsinprizemoneyandlimiteditsremarkstoasetofnoisesandlights.1、Whichofthefollowingbestgivesthemainideaofthisnewspaperarticle?()D、Computerdefeatsmaninchess!2、HowdidsomeofthegrandmastersfeelaboutthechessgamebetweenProzorovandthecomputer?()D、TheywereunhappythatthecProzorodidn,'tplaywell.3、WhatwasitthatProzorovfeltmostbitter(痛苦)about?()C、Thathehadlosttoamachine.4、Afterwiningthegame,thecomputer()D、gaveoutsomelightsandsounds5、Manychessplayersfeltthatplayingwithacomputerwould()B、makethegamelessinteresting九、Undernormalconditions,theactofcommunicationrequiresthepresenceofatleasttwopersons:onewhosendsandonewhoreceivesthecommunication.Inordertocommunicatethoughtsandfeelings,theremustbeaconventionalsystemofsignsorsymbolsthatmeanthesametothesenderandthereceiver.Themeansofcommunicationaretoonumerousandvariedforsystematicclassification;therefore,theanalysismustbegin

withthemeansofreceivingcommunication.Receptionofcommunicationisachievedbyoursenses.Sight,hearing,andtouchingseemtoplaythemostimportantroles.Smellandtasteplayverylimitedroles,fortheycannotreceiveintellectualexpressionfromfullydevelopedsystemsofsingsandsymbols.Examplesofvisualcommunicationaregestureandimitation.Althoughbothfrequentlyaccompanyspeech,therearesystemsthatrelysolelyonsight,suchasthoseusedbydeaf,anddumbpersons.Anothermeansofcommunicatingvisuallyisbysignalsoffire,smoke,flags,orflashinglight.Feelingsmaybesimplycommunicatedbytouch,suchasbyhandshakingorbackslapping,althoughahighlydevelopedsystemofhand-strokinghasenabledblind,deaf,anddumbpersonstocommunicateintelligently.Whistlingtosomeone,applaudinginatheater,andotherformsofcommunicationbysoundrelyupontheearasareceiver.Themostfullydevelopedformofauditorycommunicationis,ofcourse,thespokenlanguage.Themeansofcommunicationmentionedsofarhavetwofeaturesincommon:theylastonlyashorttime,andthepersonsinvolvedmustberelativelyclosetoeachother.Therefore,allarerestrictedintimeandspace.1、Receptionofcommunication.C、involvesuseofthesenses2、Applaudingisspecificallymentionedasanexampleof.A、communicationbysound3、Personswhocannotsee,hear,orspeakareabletocommunicatethrough.D、hand-stroking4、TheauthorspecificallymentionsthatspeechisD、themostdevelopedformofcommunicationbasedonhearing5、Accordingtothepassage,meansofcommunicationC、havesomelimitationseveniftheyarefullydeveloped十、Prehistoricmenandwomenenjoyedamorevarieddietthanpeopledonow,sincetheyatespeciesofplantandseveralhundredsthousandstypesoflivingthings.Butonlyatinypercentageofthesewereeverdomesticated.Modernshopshavehastenedatrendtowardsspecializationwhichbeganintheearliestdaysofagriculture.Thefoodoftherichcountrieshasbecomecheaperrelativetowages.Itisspeedilydistributedinsupermarkets.Butthechoiceannuallybecomeslessandlessgreat.Evenindividualfoodsthemselvesbecomemorestandardized.Weliveintheworldofcarrotspeciallybluntedinordertoavoidmakingaholeinthebag,andthetomatogrowntomeetademandforastandardweightofweightingtomatoestoakilo.SirivonReisasks:"Onlythethreemajorcereals（谷物类食物）andperhapstenotherwidelycultivatedspeciesstandbetweenfamineandsurvivalfortheworld,shumanpopulationandahandfulofdrugplantshasservedWesterncivilizationforseveralthousandyears.Aratherobviousquestionarises:Arewemissingsomething?*Afterall,thereare800000speciesofplantonearth.1、Inprehistorictimespeople .C、hadawide-rangingdiet2、Mostofushavecometoexpect.D^foodconformingtoasetstandard3、Thespecializationoffoodwasstartedby.b、theriseofagriculture4、Accordingtothepassage,peopleintheWesttodaysurviveon .C、averysmallnumberofcultivatedfoods5、Theconclusionseemstobethatwe.A、couldmakeuseofmorenaturalspecies一|一、Mostanimalshavelittleconnectionwithanimalsofdifferentkind,unlesstheyhuntthemforfood.Sometimes,however,twokindsofanimalscometogetherinapartnership（伙伴关系）whichdoesgoodtobothofthem.Youmayhavenoticedsomebirdssittingonthebacksofsheep.Thisisnotbecausetheywantaride,butbecausetheyfindeasyfoodintheparasites（寄生虫）onsheep.Thesheepallowthebirdstodosobecausetheyremovethecauseofdiscomfort.Soalthoughtheycanmanagewithouteachother,theydobettertogether.Sometimesananimalhasaplantpartner.Therelationshipdevelopsuntilthetwopartnerscannotmanagewithouteachother.Thisissointhecorals(珊瑚)ofthesea.Intheirskinstheyhavetinyplantsactas"dustman”,takingsomeofthewasteproductsformthecoralsandgivinginreturnoxygenwhichtheanimalneedstobreathe.Iftheplantsarekilled,orareeverpreventedfromlightingsothattheycannotlivenormally,thecoralswilldie.Somebirdsliketositonasheepbecause().A、theycaneatitsparasitesTheunderlinedword"they"inthelastsentenceofthefirstparagraphrefersto().B、birdsandsheepWhatdoesthesecondparagraphmainlydiscuss?()A、Someanimalsandplantsdependoneachotherforexistence.Whatdoesthisarticletalkabout?()C^Theconnectionbetweenthelivingthings.十二、Learninghowtowriteisliketakingacourseinpublicspeaking.I'daskwhetheranyoneinclasshadevertakensuchacourse.Invariablyafewhandswouldgoup."Whatdidyoulearninthatcourse?"I'dask."Well,themainthingwaslearninghowtofaceanaudience…nottobeinhibited(拘谨）...nottobenervousExactly,whenyoutakeacourseinpublicspeakingnowadays,youdon'thearmuchaboutgrammarandvocabulary.Instead,you'retaughthownottobeafraidorembarrassed,howtospeakwithoutapreparedscript,howtoreadouttotheliveaudiencebeforeyou.Publicspeakingisamatterofovercomingyourlong-standingnervousinhibitions.Thesameistrueofwriting.Thepointofthewholethingistoovercomeyournervousinhibitions,tobreakthroughtheinvisiblebarrierthatseparatesyoufromthepersonwho'11readwhatyouwrote.Youmustlearntositinfrontofyourtypewriterordictatingmachineandreadouttothepersonattheotherendofthe1ine.Ofcourse,inpublicspeaking,withtheaudiencerightinfrontofyou,theproblemiseasier.Youcanlookatthemandtalktothemdirectly.Inwriting,you'realone.Itneedsaneffortofyourexperienceorimaginationtotakeholdofthatotherpersonandtalktohimorher.Butthateffortisnecessary-oratleastit'snecessaryuntilyou,vereachedthepointwhenyouquitenaturallyandunconsciouslyutalkonpaperThetopicofthepassageisA、howtobeagoodwriterThepublicspeechcoursemainlyteachesstudentsD、howtogetovertheirnervousnesswhenmakingaspeech3、ThesimilaritybetweenmakingapublicspeechandwritingisthatB、youshouldgetoveryournervousinhibitions4、Intheopinionoftheauthor,publicspeakingismucheasierthanwritingbecauseC、youfacetheaudiencedirectlyinpublicspeaking;whilewritingisotherwise5、TheauthorofthispassageprobablyisaD、professor十三、。“Thepenismorepowerfulthanthesword（剑）Therehavebeenmanywriterswhousedtheirpenstofightthingsthatwerewrong.Mrs.HarrietBeecherStowewasoneofthem.ShewasbornintheUSAin1811.Oneofherbooksnotonlymadeherfamousbuthasbeendescribedasonethatexcitedtheworld,andwashelpfulincausingacivilwarandfreezingtheslaves.ThecivilwarwastheAmericanCivilWarof1861,inwhichtheNorthernStatesfoughttheSouthernStatesandfinallywon.Thisbookwasnamed"UncleTomsCabin”.TherewastimewheneveryEnglish-speakingman,woman,andchildhasreadthisnovelthatdidsomuchtostopslavery.Notmanypeoplereadittoday,butitisstillveryinteresting.Thebookhasshownushowawarm-heartedwritercanarouse（唤起）peoplessympathies（同情）.ThewriterherselfhadneitherbeentotheSouthernStatesnorbeenaslave.TheSouthernAmericanswereveryangryatthenovel,whichtheysaiddidnotatallrepresent(代表)truestateofaffairs,1、Accordingtothepassage().D、thebook“UncleTom'sCabin"didagreatdealintheAmericanCivilWar2^HowoldwasMrs.Stowewhenherworldfamousbookwaspublished?()C、Inherforties.WhatdoyoulearnaboutMrs.Stowefromthepassage?()A、ShehadbeenlivinginthenorthofAmericabeforetheAmericanCivilWar.WhycouldMrs.Stowe'sbookcauseacivi1warinAmerica?()B、ShedisclosedtheterriblewrongsthathadbeendonetotheslavesintheSouthernStates.5^Whatcanwelearnfromthepassage?()C、Wemustunderstandtheimportanceofliteratureandart.十四、OnThursdayAugust14th,amassivepowerfailureswitchedofflightsandshutdownfactoriesacrossalargeareaofthenorth-easternUnitedStatesandsouthernCanada.Theoutcomeaffectedsomeoftheworld*sbiggestandbusiestcities,includingNewYork,Detroit,ClevelandandToronto,leavingupto60mpeoplewithoutelectricity,equivalenttotheentirepopulationofFranceorBritain.Soseverewasthedisruption(破坏)inNewYorkStatethatitsgovernor,GeorgePataki,declaredastateofemergency.Confusedworkersspilledontothestreets,whilethousandsmoreweretrappedforhoursinliftsandhot,crowdedsubwaytrains.Lotsofstranded（进退两难的）peopleendedupspendingThursdaynightonNewYork'sstreets.ThievesinBrooklyninNewYork,andinCanada'scapital,Ottawa,tookadvantageoftheabsenceofstreetlightsandburglaralarms,andwentonalootingspree（疯狂抢掠）.Officialsweretakenabackbythespeedatwhichthechaosunfolded.PresidentGeorgeBushdescribedtheincidentasa"massivenationalproblem"andpromisedafullinvestigationintowhatcausedit.Thatisstillamatterofsomedebate.Atfirst,naturally,therewerefearsofterroristinvolvement,butthiswasquicklyruledout.However,officialswereleftarguingaboutwhathadactuallyhappened.TheofficeofCanada'sprimeminister,JeanChretien,saidthatasevereaccidentatanuclear-powerplantinPennsylvaniamayhavebeenthecause.Earlier,AmericanandCanadianofficialshadsaidafireorperhapslightninghadhitapowerplantnearNiagaraFallsinNewYorkState.i.SeveralcitieswereaffectedbythemassivepowerfailureonAugust14thexcept.C:ChicagoTheword"outage"inParagraph1canbebestreplacedby.D、powerfailureWhichofthefollowingstatementsistrueaccordingtothepassage?D、Officialswerenotsurewhathadcausedthepowerfailure.Itcanbeinferredfromthepassagethat.A、Francehasapopulationofabout60million.ThepowerfailureonAugust14thbroughtaboutbigchaosexceptthat.D、apowerplantnearNiagaraFallswashitbyafireorlightning.十五、Whenwelookattheskyandseeabrightlightmovingquicklyacrossitorcomingtowardstheearth,wetalkaboutseeingashootingstar“oraufallingstar”.Thesemovinglightsarenot,infact,starsatall.Theyaresmallpiecesofmatterfromouterspace,whichburnupastheyentertheEarth'satmosphere.Thecorrectnameofthemismeteoroids.AnypiecesthatmakeittotheEarth'ssurfacewithoutcompletelyburningupareknownasmeteorites.Ameteorisactuallythenamegiventothelightweseewhenameteoroidisburningup.WhenameteoritehitstheEarthatspeedsbetween11and72kilometersasecond,itcandoamazingdamage.Averylargemeteoritecouldknocktheearthoutofitsorbit.Ifthishappened,alllifeonEarthwouldprobablybecomeextinct（灭绝）.ThepathwefollowaroundtheSunwouldchangeandasaresulttheEarthwouldbecomeeithermuchhotterormuchcolder.Thischangeintemperaturewouldaffectsealevelsandtheamountofwaterinrivers.Therewouldeitherbehugefloods,whichwouldcovermostofthelandwithwater,ortheoceanswoulddryupandtherewouldbeadrought,whichmeansalongperiodoftimewithoutrain.Eitherway,nothingcouldsurvive.Ifalargemeteoritelandedintheseaitwouldalmostcertainlycausetsunamis,whichwouldracetowardstheland,destroyingeverythingintheirpaths.AlthoughitisunlikelytheEarthwillbestruckbyameteoritelargeenoughtodothatkindofdamage,thereisevidenceoffairlylargemeteoriteshittingtheEarthinthepast.In1908alargeareaofforestinTunguska,Siberiawasdestroyedbyameteoritethatcameapartjustbeforeithittheground.Themoon,however,hasaboutthreebillioncraters陨石坑causedbymeteoritesimpacting影响itssurface.ThereasonmoremeteoriteshavereachedthesurfaceofthemoonthanthesurfaceoftheEarthisthatthemoondoesnothaveenoughatmosphereforthemeteoritestoburnupin.someofthemeteoritesthathavereachedtheEarth'ssurfacehavedoneconsiderabledamage.SomescientistsbelieveitwasachangeofclimatecausedbymeteoriteshittingtheEarththatresultedintheextinctionofthedinosaursandotherlargeprehistoricanimals.Scientistsareespeciallyinterestedinmeteoritesbecausetheycontaininformationaboutthesolarsystem.Itiswidelybelievedbyscientiststhatmostmeteoritesareproducedbycollisions（碰撞）betweenasteroids（smallplanets）.Thesecollisionsprobablyhappenedmanybillionsofyearsago.Thismeansthephysicalandchemicalstructureofameteoritecangivescientistsinformationabouttheearlydaysoftheuniverse.Thestoryisabout .B、matterfromouterspaceTheEarthhas .B、fewercratersthanthemoonSomescientistsbelievethedinosaursbecameextinctbecause.C、meteoriteslandedandchangedtheclimate、Meteorsare.D、thelightweseewhenmeteoroidshitouratmosphere十六、Ihadjustgonetobedafteraveryharddaywhenthephonerang.Itwasaneccentric（怪僻的）farmer.Ihadnevermethimbeforealthough,Ihadoftenheardpeopletalkabouthim.HesoundedquitenervousandhehadbeentalkingforaminuteorsobeforeIunderstoodanything.EventhenallIcouldmakeoutwasthatsomeonecalledMillyhadhadaverybadaccident.IhadnottheslightestideawhoshewasbutIobviouslyhadtogo.IthadbeensnowingheavilythatdayandIdidnotknowtheway.IhadbeendrivingforatleastanhourwhenIfinallyfoundhisplace.Hewasstandingthere,waitingforme.ItseemedMillyhaddied."Shemeantmoretomethananyone…evenmywife!”hesaid.Icouldseethathehadbeencrying.Ithoughtsomethingterriblehadtakenplace,apossiblescandal（丑闻）.Iwasevenmoreshockedwhenhetoldmehehadputherinthebarn（厩）.“Iwouldn'tleaveheroutinthecold!”hesaid.Millyhadclearlybeenasecretloverofhis.Iwasabouttotellhimhecouldnotexpectmetocoveranythingupwhenheopenedthebarndoor.HeliftedhiscandleandIsawadarkfigureontheground."Shewassuchagoodcow!Iwouldn,tletanyonebutadoctortouchher!”hesaid,andburstintotearsagain.Theunderlinedphrasemakeoutinthefirstparagraphmeans.C、开出Beforehearrivedatthefarmer'shouse,thewriterexpectedtoseeMillylying.D、inbedinabarnWhatdoweknowaboutMillyfromthestory?B>Shehadcausedascandal.Thefarmerwishedthatthewritermight.D、keepthewholethingasecret十七、UniversityofArizonaresearcherDr.WilliamRathjisaysthatafterastudybasedonlookingintogarbagecans,theaveragefamilywastesatleast$150peryearinfood.“Homemakersgooutoftheirwaytosavepenniesatthestoreandthendon'trealizethatwasteofedible（可食用的）foodsaddsupmuchmoreathome,"saidDr.Rathji.Hewasoneofabout100foodexpertswhometinBoiseforaconferenceonfoodwasteandwaystopreventit.Americanfamiliesthrowoutbetween8%and20%ofediblefoodatacostof$4.5billionperyear.That'salmostasmuch