高考英语阅读理解专项训练科技类(附详解)

高考英语阅读理解专项训练——科技类(1)Withonlyabout1,000pandasleftintheworld,Chinaisdesperatelytryingtoclone(克隆)theanimalandsavetheendangeredspecies(物种).That’samovesimilartowhataTexasA&MUniversityresearchershavebeenundertakingforthepastfiveyearsinaprojectcalled“Noah’sArk”.Noah’sArkisaimedatcollectingeggs,embryos(胚胎),semenandDNAofendangeredanimalsandstoringtheminliquidnitrogen.Ifcertainspeciesshouldbecomeextinct,Dr.DuaneKraemer,aprofessorinTexasA&M’sCollegeofVeterinaryMedicine,saystherewouldbeenoughofthebasicbuildingblockstoreintroducethespeciesinthefuture.Itisestimatedthatasmanyas2,000speciesofmammals,birdsreptileswillbecomeextinctinover100years.Thepanda,nativeonlytoChina,isindangerofbecomingextinctinthenext25years.Thisweek,ChinesescientistssaidtheygrewanembryobyintroducingcellsfromadeadfemalepandaintotheeggcellsofaJapanesewhiterabbit.Theyarenowtryingtoimplanttheembryointoahostanimal.Theentireprocedurecouldtakefromthreetofiveyearstocomplete.“Thenucleartransfer(核子移植)ofonespeciestoanotherisnoteasy,andthelackofavailable(capableofbeingused)pandaeggscouldbeamajorproblem,”Kraemerbelieves.“Theywillprobablyhavetodoseveralhundredtransferstoresultinonepregnancy(havingababy).Ittakesalongtimeandit’sdifficult,butthiscouldbegroundbreakingscienceifitworks.Theyarecertainlynotputtinganylivepandasatrisk,soitisworththeeffort,”addsKraemer,whoisoneoftheleadersoftheProjectatTexasA&M,thefirst-everattemptatcloningadog.“Theyaretryingtodosomethingthat’sneverbeendone,andthisisverysimilartoourworkinNoah’sArk.We’rebothtryingtosaveanimalsthatfaceextinction.Icertainlyappreciatetheireffortandthere’salotwecanlearnfromwhattheyareattemptingtodo.It’saresearchthatisverymuchneeded.”1.Theaimof“Noah’sArk”projectisto_______.A.makeeffortstoclonetheendangeredpandasB.saveendangeredanimalsfromdyingoutC.collectDNAofendangeredanimalstostudyD.transferthenuclearofoneanimaltoanother2.AccordingtoProfessorKraemer,themajorproblemincloningpandaswouldbethelackof_______.A.availablepandaeggs B.hostanimalsC.qualifiedresearchers D.enoughmoney3.Thebesttitleforthepassagemaybe_______.A.China’sSuccessinPandasCloning

B.TheFirstClonedPandaintheWorldC.ExploringthePossibilitytoClonePandasD.China—theNativePlaceofPandasForever4.Fromthepassageweknowthat_______.A.KraemerandhisteamhavesucceededincloningadogB.scientiststrytoimplantapanda’seggintoarabbitC.KraemerwillworkwithChinesescientistsincloneresearchesD.abouttwothousandofspecieswillprobablydieoutinacentury(2)Wantaglanceofthefutureofhealthcare?Takealookatthewaythevariousnetworksofpeopleaboutpatientcarearebeingconnectedtooneanother,andhowthisnewconnectivityisbeingexploitedtodelivermedicinetothepatient—nomatterwhereheorshemaybe.Onlinedoctorsofferingadvicebasedonnormalsymptoms(症状)arethemostobviousexample.Increasingly,however,remotediagnosis(远程诊断)willbebasedonrealphysiologicaldata(生理数据)fromtheactualpatient.AgroupfromtheUniversityofKentuckyhasshownthatbyusingpersonaldataassistanceplusamobilephone,itisperfectlypracticaltosendapatient’simportantsignsoverthetelephone.Withthiskindofequipment,thecryaskingwhethertherewasadoctorinthehousecouldwellbeathingofthepast.Othermedicaltechnologygroupsareworkingonapplyingtelemedicinetorural(countryside)care.Andatleastoneteamwantstousetelemedicineasatoolfordisasterneed—especiallyafterearthquakes.Onthewhole,thetrendistowardsprovidingglobalaccesstomedicaldataandexperts’opinions.Butthereisoneproblem.Bandwidth(宽带)isthelimitingfactorforsendingcomplex(复杂的)medicalpicturesaroundtheworld—CTphotosbeingoneofthebiggestbandwidthusers.Communicationsatellitesmaybeabletodealwiththeshort-termneedsduringdisasterssuchasearthquakesorwars.Butmedicineislookingtowardsboththesecond-generationInternetandthird-generationmobilephonesforthefutureofremotemedicalservice.Doctorshavemettodiscusscomputer-basedtoolsformedicaldiagnosis,trainingandtelemedicine.Withthefallingpriceofbroadbandcommunications,thenewtechnologiesshouldstartanewtimewhentelemedicineandthesharingofmedicalinformation,experts’opinionsanddiagnosisarecommon.1.Thewriterchieflytalksabout_______.A.theuseoftelemedicine B.theon-lineddoctorsC.medicalcareandtreatment D.communicationimprovement2.Thebasisofremotediagnosiswillbe_______.A.personaldataassistanceB.somewordsofapatientC.realphysiologicalinformationD.medicalpicturesfromtheInternet3.Whichofthefollowingstatementsistrueaccordingtothetext？A.Patientsdon’tneeddoctorsinhospitalsanymore.B.Itisimpossibletosendapatient’ssignsoverthetelephone.C.Manyteamsusetelemedicinedealingwithdisastersnow.D.Broadbandcommunicationswillbecomecheaperinthefuture.4.The“problem”inthefourthparagraphreferstothefactthat_______.A.bandwidthisn’tbigenoughtosendcomplexmedicalpicturesB.thesecond-generationofInternethasnotbecomepopularyetC.communicationsatellitescanonlydealwithshort-termneedsD.thereisnotenoughequipmentforspreadingthemedicalcare(3)ScientistsareuncoveringthesecretsoftwoportcitieslostunderthewatersoftheMediterraneanSea,aresearchersaidyesterday.HerakleionandMenouthiswererichandproudcitiesuntilsomethingreducedthemtorubble(碎石)andburiedtheminthemudbeneath30feetofseawater,FrenchunderwaterexplorerFranckGoddiosaidattheAmericanGeophysicalUnionconference.“Thisisamysterythatisongoing,”saidGoddio,afounderoftheEuropeanInstituteofMarineArcheology,aParis-basedunderwaterresearchorganizationbackedbythewealthyHiltiFoundationofLiechtenstein(列支敦士登基金会).ThedestructionofthetwinportcitieshashauntedGoddioeversincehehappeneduponthesiteabout15milesfromAlexandriawhileexploringsunkenshipsfromNapoleon’sfleet.Goddioandhisgroupofexpertdivers,marinearcheologists(海洋考古学家)andothers,areusinghighpoweredvacuums,satellitenavigationsystemsandsophisticatedsonar(声纳)toexcavate(挖掘)thesunkencitiesfromunderneathacarpetofsiltaboutonemeter(threefeet)high.Wallsofshops,remainsofstreetsandgoldartifactshavebeenfoundandrecovered.Someexpertsbelievethattheportcitiesweredestroyedbyaseriesofmassiveearthquakes,muchlikethequakesscientistsbelievefelledTroy(特洛伊城),Jerichoandotherancientcities.Theuniformdirectionofthecollapsedcolumnsandwallssuggestanearthquake,Goddiosaid,butnofaultlineshavebeenfoundnearby.Otherresearchersbelieveamassivewave,causedbyeitheranoffshoreearthquakeoradistantunderwaterlandslide,couldexplainthecatastrophe.StillothersthinkrisingseasandashiftintheNileRiveroutletdoomedthecities.“Theargument,asyoucansee,continues,”Goddiosaid.1.ThereasonwhythetwoportcitiesdisappearedunderthewatersofMediterraneanSeaisthat______.A.thetwoportcitiesweredestroyedbyhugeearthquakesB.thedisappearanceofthetwoportcitieswascausedbyunderwaterlandslideC.risingseasandashiftintheNileRiveroutletdoomedthecitiesD.thestorydidn’ttellusatall2.Fromthestorywecandrawaconclusionthat_______.A.thetwoportcitieswerefamousfortheirwealthandthemysteryB.thetwocitiesbelongedtoFranceC.somemysteriouscreaturesfromotherplanetsdestroyedthetwocitiesD.theAmericanGeophysicalUnionconferencewasonceheldinoneofthetwocities3.Thisarticleisprobablyfrom_______.A.ascientificmagazineB.areporttothegovernmentC.aschooltextbookD.ascientificreportinanewspaper(4)Motherhoodmaymakewomensmarterandmayhelppreventdementia(痴呆)inoldagebybathingthebraininprotectivehormones(荷尔蒙),U.S.reseachersreportedonThursday.Testsonratsshowthatthosewhoraisetwoormorelittersofpupsdoconsiderablybetterintestsofmemoryandskillsthanratswhohavenobabies,andtheirbrainsshowchangesthatsuggesttheymaybeprotectedagainstdiseasessuchasAlzheimer’s(早老痴呆症).UniversityofRichmondpsychologyprofessorCraigKinsleybelieveshisfindingswilltranslateintohumans.“Ourresearchshowsthatthehormonesofpregnancy(怀孕)areprotectingthebrain,includingestrogen(雌激素),whichweknowhasmanyneuroprotective(保护神经的)effects,”Kinsleysaid.“It’sratdatabuthumansaremammalsjustliketheseanimalsaremammals,”headdedinatelephoneinterview.“Theygothroughpregnancyandhormonalchanges.”KinsleysaidhehopedpublichealthofficialsandresearcherswilllooktoseeifhavinghadchildrenprotectsawomanfromAlzheimer’sandotherformsofage-relatedbraindecline.“Whenpeoplethinkaboutpregnancy,theythinkaboutwhathappenstobabiesandthemotherfromtheneckdown,”saidKinsley,whopresentedhisfindingstotheannualmeetingoftheSocietyofNeuroscienceinOrlando,Florida.“Theydonotrealizethathormonesarewashingonthebrain.Ifyoulookatfemaleanimalswhohavenevergonethroughpregnancy,theyactdifferentlytowardyoung.Butifshegoesthroughpregnancy,shewillsacrificeherlifeforherinfant—thatisagreatchangeinherbehaviorthatshowedingeneticalterations(改变)tothebrain.”1.Howdoscientistsknow“Motherhoodmaymakewomensmarter”?A.Someresearchershavetoldthem.B.Manywomensayso.C.Theyknowitbyexperimentingonrats.D.Theyknowitthroughtheirownexperience.2.Whatdoesthephrase“littersofpups”meaninthesecondparagraph?A.Babyrats. B.Animals. C.Oldrats. D.Grown-uprats.3.Whatcanprotectthebrainofawomanaccordingtothepassage?A.Estrogen. B.Thehormonesofpregnancy.C.Moreexercise. D.Takingcareofchildren.4.“It’sratdatabuthumansaremammalsjustliketheseanimalsaremammals.”Whatdoesthesentencesuggest?A.Theexperimentsontheratshavenothingtodowithhumans.B.Theexperimentsontheratsareveryimportantforanimals.C.Theexperimentsontheratsaremuchthesameonhumans.D.Theexperimentsontheratsaremuchthesameonotheranimals.5.Whichtitleisthebestforthispassage?A.DoYouWanttoBeSmarter?B.MotherhoodMakesWomenSmarterC.MysteriousHormonesD.AnImportantStudy(5)Togetcashoutinthe21stcentury,youwon’tneedabankcard,aPIN(个人识别编号)orevenhavetomoveafinger.Youwillsimplyhavetolookthecashmachinestraightintheeye,declaresNationalCashRegisters,amultinationalcompanythatmakesautomatedtellermachines,orATMs.NCRhasshownitsfirstexamplemachinethatisbelievedtobethefutureofbanking.InsteadofaskingyouforyourPINonascreen,theSuperTeller-Stellaforshort,asksyouorallythroughaloudspeakertolookstraightaheadwhileaninfraredcameraturnstoyourhead,thenyoureye,andfinallytakesaninfraredphotographofyouriris(虹膜).Foridentification(识别)purposes,anirispictureisbetterthanafingerprint,witharound256noticeablecharacteristicscomparedwith40forfingerprints.Thismeansthatthechancesofsomeoneelsebeingrecognizedinyourplaceisabout1in1020.Onceyou’vebeenidentified,Stellagreetsyoubynameandsays:“Wouldyoulikecashorastatement?”Aninfraredportallowsthemachinetosendabankstatementstraighttoyourpocketcomputer.1.Whatdoesthispassagemainlytalkabout?A.AnewmedicalinstrumentB.Anewtypeoftalkingmachine.C.Anewtypeofcashmachine.D.NationalCashRegister2.Whatisthisnewmachinecalled?A.Stella B.ATM C.PIN D.NCR3.Whenyouwanttogetcashoutinthe21stcentury,youwill_______.A.needabankcard B.havetoputinyourPINC.moveyourfinger D.justlookdirectlyatthetellermachine(6)Weatherchangeswhenthetemperatureandtheamountofwaterintheatmospherechange.Wecanseeandfeelwatercomingfromtheatmospherewhenwehaverain.Butthewatermustsomehowgetbacktotheatmosphere.Meteorologistscallthisthewatercycle.Therearemanystagesinthewatercycle.Rainfallswhenwatervapourincloudscondenses(凝结).Dropsofwaterformandfalltotheground.Thewatersoaksintothegroundandfeedsstreamsandrivers.Alotofrainfallsintothesea.Theheatofthesunevaporatessomeofthewaterinthegroundandintherivers,lakes,andthesea.Itchangestheliquidwaterintowatervapour.Thevapourrisesontotheair.Watervapourisnormallyinvisible.Onaverydamporhumidday,however,youcansometimesseewatervapourrisingfromapuddle(水坑)orpondinamist(薄雾)abovethewater.Watervapouralsogetsintotheairfromlivingthings.Treesandotherplantstakeinwaterthroughtheirrootsandgiveoffwatervapourfromtheirleaves.Peopleandlandanimalsdrinkwaterandbreatheoutwatervapour.Inallthesewaysthewaterreturnstotheair.Thereitgatherstoformcloudsandcondensestoformrain.Therainfallstoearth,andthecyclestartsagain.Itcontinuesevenifsnoworhail(冰雹)fallinsteadbecausebotheventuallymelttoformwater.Theamountofwatervapourintheairdependsonthetemperature.Theairismoremoist(潮湿)inthetropics(热带)thaninthecoldpolarregions.1.Whatisthemainideaofthepassage?A.Watercycle. B.Watervapour.C.Howrainforms.

D.Water,vapour,rain.2.Howmanywaysofthewaterreturningtotheairarediscussedinthetext?A.Two.

B.Three. C.Four.

D.Five.3.Whetherwatervapourcanbeseenornotdependson_______.A.howmuchwaterisevaporated B.howgoodyoureyesareC.inwhichwaywaterisevaporated

D.climateorweather4.Fromthepassagewegettoknow_______.A.thereismorewatervapourintheairinthetropicsthanincoldpolarregionsB.thereismorewatervapourintheairincoldpolarregionthaninthetropicsC.itgetsmoreraininthetropicsthanincoldpolarregionsbecausethereislessvapourD.theamountofwatervapourintheairdependsonhowoftenitrains(7)Technologyistheapplication(应用)ofknowledgetoproduction.Thankstomoderntechnology,wehavebeenabletoincreasegreatlytheefficiencyofourworkforce.Newmachinesandnewmethodshavehelpedcutdowntimeandexpensewhileincreasingoveralloutput.Thishasmeantmoreproductionandahigherstandardofliving.FormostofusinAmerica,moderntechnologyisthoughtofasthereasonwhywecanhavecarsandtelevisionsets.However,technologyhasalsoincreasedtheamountoffoodavailabletous,bymeansofmodernfarmingmachineryandanimalbreedingtechniques,andhasextendedourlifespanvia(通过)medicaltechnology.Willmankindcontinuetolivelongerandhaveahigherqualityoflife?Inlargemeasuretheanswerdependsontechnologyandourabilitytouseitwidely.Ifwekeepmakingprogressaswehaveoverthepastfiftyyears,theanswerisdefinitelyyes.Theadvancementoftechnologydependsuponresearchanddevelopment,andthelateststatistics(统计)showthattheUnitedStatesiscontinuingtopumpbillionsofdollarsannually(每年)intosuchefforts.Sowhilewearerunningoutofsomescarceresources(少的资源)wemaywellfindtechnologicalsubstitutes(代用品)formanyofthemthroughourresearchprograms.Therefore,inthefinalanalysisthethreemajorfactorsofproduction(land,laborandcapital)areallinfluencedbytechnology.Whenweneednewskills,ontechniquesinmedicine,peoplewillstartdevelopingnewtechnologytomeetthoseneeds.Asequipmentprovestobesloworinefficient,newmachineswillbeinvented.Technologyrespondstoourneedsinhelpingusmaintainourstandardofliving.1.Whatisthebesttitleforthepassage?A.Thedefinitionoftechnology B.ModerntechnologyC.Theapplicationoftechnology D.Thedevelopmentoftechnology2.Whichisthemainideaofthepassage?A.Moderntechnologyisthekeytotheimprovementofstandardofliving.B.Thethreemajorfactorsofproduction(land,laborandcapital)areallinfluencedbytechnology.C.Technologyistheresponsetoourneeds.D.TheUnitedStatesismakinggreateffortstoadvanceitstechnology.3.Accordingtothepassage,peoplecanlivealonglifewiththehelpof_______.A.higherqualityoflife B.medicaltechnologyC.modernfarmingmachinery D.technologicalsubstitute(8)Spacetravelisdefinitelybadforastronauts’bones,reducingtheirbonedensity(密度)afteronlyamonthofweightlessness,accordingtoFrenchresearchpublishedonFriday.LaurenceVicoandhisfellowworkersatStEtienneUniversitycalledformoreresearchintotheeffectsofmicrogravity,aftertheirstudyof15astronautsfromtheRussianMIRstationshowedbonelosscontinuedthroughoutspaceflights.“Bonelosswasespeciallystrikinginfourastronauts,”thescientistsreportedintheLancetMedicalJournal.Theymeasuredthebonemineraldensity(BMD)ofbonesintheforearm(前臂)andlowerlegoftheastronautswhohadspentonetosixmonthsinspace.TheBMDlosswassignificantinthetibia(胫骨)ofthelowerleg,aweight-bearingbone,butbarelychangedintheradius(桡骨)oftheforearm.“Ourresultsindicatetheneedtoinvestigatenotonlydifferentbones,butalsodifferentareasofthesamebonesincenotallsitesoftheskeleton(骨架)aresimilarlyaffectedbyspaceconditions,”theyadded.Withoutgravitythebodyisn’tbearinganyweightsothereisnoneedforcalcium(钙)whichmakesbonesstrong,anditbecomesemptyintothebloodstream.Theresearchteamsuggestedinfuturescientistsshouldtrytodetermineifthelossofbonedensitywasonlyonweight-bearingbonesonlongerflights,alsothepossiblerecoveryafterreturningtoEarth.1.FrenchscientistsdidtheirresearchonRussianastronauts,because_______.A.theyonlycaredfortheRussianastronautsB.theywerenotinterestedintheirownastronautsC.theRussiangovernmentinvitedthemtodotheirresearchD.theRussianastronautsworkedinspaceforalongtime2.Scientistshavefoundthat_______.A.theBMDlossmaycauseseriousillnesstoastronautsB.theBMDlossmaycausesomechangeinastronauts’bodiesC.astronautsshouldn’tcareabouttheBMDlossD.astronautsshouldtakesomecalciumbeforespacetravel3.WhatcausetheBMDlosstoastronauts,accordingtothispassage?A.Thefoodtheyeatinspace. B.Thedrinkstheytakeinspace.C.Thetemperatureinspace. D.Thegravityinspace.4.Inthethirdparagraph,theword“striking”means______.A.unusual B.simple C.weak D.slow(9)Somespidershuntontheground,othersbuildwebstotraptheirfood,butthegrasswaterspidercatchesitspreybyrunningalongthesurfaceofthewater.Thisspecialwaterspiderlivesonthegrassybanksofstreamswheremosquitoes,damselfliesandotherinsectscometofeedandbreed.AlthoughitisoneofthelargestspidersinNewZealand,ithasanunusualability.Itdoesn’tdisturbthewaterasitwaitsforitsmeal,andthereisbarelyaripple(波纹)whenitskims(掠过)acrossthesurfaceatlightningspeedtocatchitsprey.Grasswaterspidersdealswiftlywithlargerinsectslikedamselfliesbypullingtheirheadsunderthewaterandholdingthemthereuntiltheydrown.Afterameal,thegrasswaterspiderspendsuptohalfanhourgrooming(修饰)itself.Itwipesitseighteyes,brushesitsantennae(触角),andtakesspecialcaretocleanthehairsonitsbody.Itisthehairsthattraptinybubbles(泡沫)ofairsothatthespidercanrundownablade(叶片)ofgrassandstayunderwaterforuptoanhourwhenitisfrightened.Thehairsalsokeepthespiderdry,evenunderwater.Itisonlywhenthefemalespideriscaringfortheyoungthatshedoesnothuntonthewater.Aftermating,sheproducesalargeeggsac(囊),whichshecarriesaroundforfiveweeks.Oncetheeggsstarttohatch,sheattachesthesactosomebladesofgrassorathistle.Shethentearsthesacopenandreleasesthetinyspidersintothenurseryweb.1.Howdoesthegrasswaterspiderkillitsprey?A.inaweb B.bydrowning C.bypoisoning D.withitsantennae2.thewriterdescribesthespecialspideras“special”because_______.A.itwalksonwater B.ithaseighteyesC.ofitshairyappearance D.ofthewayitproducesitsyoung3.Thepassagetellsusthatthespider______.A.feedsgrassandthistlestoitsyoung.B.livesonbladesofgrassunderthewaterC.livesinthegrassonthebanksofstreamsD.eatsamealonceeveryfiveweeks4.Thepurposeofthepassageisto_______.A.convincereadersthatspidersaredangerousB.indicatethatthegrasswaterspiderisendangeredC.listallofthespidersthatcanbefoundinNewZealandD.describethecharacteristicsofthegrasswaterspider(10)Perhapsthemostfamoustheory,thestudyofbodymovement,wassuggestedbyProfessorRayBirdwhistell.Hebelievesthatphysicalappearanceisoftenculturallyprogrammed.Inotherwords,welearnourlooks—wearenotbornwiththem.Ababyhasgenerallyinformedfacefeatures.Ababy,accordingtoBirdwhistell,learnswheretosettheeyebrowsbylookingatthosearound-familyandfriends.ThishelpsexplainwhythepeopleofsomeareasoftheUnitedStateslooksomuchalike,newEnglandersorSouthernershavecertaincommonfacefeaturesthatcannotbeexplainedbygenetics(遗传学).Theexactshapeofthemouthisnotsetatbirth,itislearnedafter.Infact,thefinalmouthshapeisnotformeduntilwellafternewteethareset.Formany,thiscanbewellintogrown-ups.Ahusbandandwifetogetherforalongtimeoftencometolookalike.Welearnourlooksfromthosearoundus.Thisisperhapswhyinasinglecountryareawherepeoplesmilemorethanthoseinotherareas.IntheUnitedStates,forexample,theSouthisthepartofthecountrywherethepeoplesmilemostfrequently.InNewEnglandtheysmileless,andinthewesternpartofNewYorkStatestillless.ManysouthernersfindcitiessuchasNewYorkcoldandunfriendly,partlybecausepeopleonMadisonAvenuesmilelessthanpeopleonPeachtreeStreetinAtlanta.Georgia.PeopleinAtlanta,Georgia.Peopleinlargelypopulatedareasalsosmileandgreeteachotherinpubliclessthanpeopleinsmalltownsdo.1.RayBirdwhistellbelievesthatphysicalappearance_______.A.haslittletodowithcultureB.hasmuchtodowithcultureC.iseverchangingD.isdifferentfromplacetoplace2.Accordingtothepassage,thefinalmouthshapeisformed_______.A.beforebirth B.assoonasone’steetharenewlysetC.sometimeafternewteethareset D.around15yearsold3.RayBirdwhistellcantellwhatareaoftheUnitedStatesapersonisfromby_______.A.howmuchheorshelaughs B.howheorsheraiseshisorhereyebrowsC.whatheorshelikesbest D.thewayheorshetalks4.Thispassagemighthavebeentakenoutofabookdealingwith________.A.physicsB.chemistry C.biology D.noneoftheabove(11)SupposewebuiltarobottoexploretheplanetMars.Weprovidetherobotwithseeingdetectors(探测器)tokeepitawayfromdanger.Itispoweredentirelybythesun.Shouldweprogramtherobottobeequallyactiveatalltimes?No,therobotwouldbeusingupenergyatatimewhenitwasnotreceivingany.Sowewouldprobablyprogramittostopitsactivityatnightandtowakeupatdawnthenextmorning.Accordingtoevolutionary(进化的)theoryofsleep,evolutionequippeduswitharegularpatternofsleepingandwakingforthesamereason.Thetheorydoesnotdenythatsleepprovidessomeimportantrestorativefunctions.Itmerelysaysthatevolutionhasprogrammedustoperformthosefunctionsatatimewhenactivitywouldbeinefficientandpossiblydangerous.However,sleepprotectsusonlyfromthesortoftroublewemightwalkinto;itdoesnotprotectusfromtroublethatcomeslookingforus.Sowesleepwellwhenweareinafamiliar,safeplace,butwesleeplightly,ifatall,whenwefearthatbearswillnoseintothetent.Theevolutionarytheoryexplainthedifferencesinsleepamongcreatures.Whydocats,forinstance,sleepsomuch,whilehorsessleepsolittle?Surelycatsdonotneedfivetimesasmuchrepairandrestorationashorsesdo.Butcatscanaffordtohavelongperiodsofinactivitybecausetheyspendlittletimeeatingandareunlikelytobeattackedwhiletheysleep.Horsesmustspendalmostalltheirwakinghourseating,becausewhattheyeatisverylowinenergyvalue.Moreover,theycannotaffordtosleeptoolongortoodeeply,becausetheirsurvivaldependsontheirabilitytorunawayfromattackers.1.Theauthorusestheexampleoftherobotinspaceexplorationtotellus_______.A.thedifferencesbetweenrobotsandmenB.thereasonwhymenneedtosleepC.abouttheneedforrobotstosavepowerD.aboutthedangerofmenworkingatnight2.Evolutionhasprogrammedmantosleepatnightchieflytohelphim______.A.keepuparegularpatternoflifeB.preventtroublethatcomeslookingforhimC.avoiddangerandinefficientlabor D.restorehisbodilyfunctions3.Whichofthefollowingisthemainideaofthepassage?A.Evolutionhasequippedallcreatureswitharegularpatternofsleepingandwaking.B.Thestudyofsleepisanimportantartoftheevolutionarytheory.C.Sleepingpatternsmustbetakenintoconsiderationinthedesigningofrobots.D.Thesleepingpatternofalivingcreatureisdeterminedbythefooditeats.(12)Believeitornot,opticalillusion(错觉)cancuthighwaycrashes.Japanisacaseinpoint.Ithasreducedautomobilecrashesonsomeroadsbynearly75percentusingasimpleopticalillusion.Butstripes,calledchevrons(人字形),paintedontheroadsmakedriversthinkthattheyaredrivingfasterthantheyreallyare,andthusdriversslowdown.NowtheAmericanAutomobileAssociationFoundation(基金会)forTrafficSafetyinWashingtonD.C.isplanningtorepeatJapan’ssuccess.Startingnextyear,thefoundationwillpaintchevronsandotherpatternsofstripesonselectedroadsaroundthecountrytotesthowwellthepatternsreducehighwaycrashes.Excessive(toogreat)speedplaysamajorroleinasmuchasonefifthofallfataltrafficaccidents,accordingtothefoundation.Tohe