英語(yǔ)四級(jí)模擬試題(附答案)

英語(yǔ)四級(jí)模擬試題（附答案）PartⅠWriting(30\o"minutes是什么意思"minutes)Directions:Forthispart,youareallowed30\o"minutes是什么意思"minutestowriteashortessay\o"entitled是什么意思"entitledOnChineseWorkers-PaidHolidays.Youshouldwriteatleast120wordsfollowingthe\o"outline是什么意思"outlinegivenbelow:1.有人認(rèn)為“帶薪休假”有很多好處……2.有人認(rèn)為“帶薪休假”落到實(shí)處很難3.你的觀點(diǎn)及建議PartⅡReadingComprehension(SkimmingandScanning)(15\o"minutes是什么意思"minutes)Directions:Inthispart,youwillhave15\o"minutes是什么意思"minutestogooverthepassagequicklyandanswerthequestionsonAnswerSheet1.Forquestions1-7,markY(forYES)ifthe\o"statement是什么意思"statementagreeswithinformationgiveninthepassage;N(forNO)ifthe\o"statement是什么意思"statementcontradictstheinformationgiveninthepassage;NG(forNOTGIVEN)iftheinformationisnotgiveninthepassage.Forquestions8-10,completethesentenceswiththeinformationgiveninthepassage.\o"Obesity是什么意思"ObesityinChildren\o"Obesity是什么意思"Obesityinchildrenandadolescentsisrisingatanalarmingrate.Currentlyover15%ofyoungpeopleover6yearsoldareobese,and\o"obesity是什么意思"obesityisalsoincreasingamongchildrenaged5andyounger.ChildrenareconsideredtobeoverweightiftheBMI(Body\o"Mass是什么意思"Mass\o"Index是什么意思"Index)isover85%ofthe\o"weight是什么意思"weightgroupintheirageandsexcategories.Ifitis95%andover,theyareconsideredtobeobese.Adolescentsaregenerallyjudgedaccordingtoadultcriteriafor\o"obesity是什么意思"obesity,althoughthereareotherconsiderationsinthis\o"population是什么意思"population.Ethnicvariations,timingofgrowthspurts,andhigher\o"normal是什么意思"normalfatlevelsaroundpubertycancausedisparitiesinthesemeasurements.CausesandRiskFactorsfor\o"Obesity是什么意思"ObesityinChildrenLifestyleFactors.Withouteducationalorparental\o"guidance是什么意思"guidance,childrenare\o"extremely是什么意思"extremely\o"vulnerable是什么意思"vulnerabletothe\o"intense是什么意思"intenseculturalpressuresthatarelargelyresponsibleforthe\o"obesity是什么意思"obesity\o"epidemic是什么意思"epidemic.Neitherthe\o"media是什么意思"medianortheeducationalsystemhasstrongwell-financedprogramsthat\o"encourage是什么意思"encouragehealthy-alternatives,includingexerciseandhealthyfoods.Thefollowingaresome\o"specific是什么意思"specificproblemscreatedbytheculture:*\o"Excessive是什么意思"Excessivetelevisionwatchingplaysa\o"critical是什么意思"criticalrolein\o"obesity是什么意思"obesityinchildren.Notonlyisita\o"sedentary是什么意思"sedentaryactivity,buttelevisionalsooffersinnumerabletemptationswithitsadvertisementsforfastfoods,sugarcereals,and\o"unhealthy是什么意思"unhealthysnacks.Inonestudy\o"obesity是什么意思"obesityrateswerelowestinchildrenwhowatchedtelevisiononehourorlessadayandhighestinthosewhowatchedfourormorehours.*Sugar,particularlyfromsoda,othersweetenedbeverages,andfruitjuice,maybemajorcontributorstochildhood\o"obesity是什么意思"obesity.Onestudyreportedthatdrinkingsodaregularlyincreasesachild’sriskfor\o"obesity是什么意思"obesityby60%.*Lessphysicalexerciseandgreater\o"sedentary是什么意思"sedentaryactivitiesplayanothersignificantrolein\o"obesity是什么意思"obesityinchildren.Ahighlevelofphysical,activity—notjustusingupenergy—isimportantfor\o"weight是什么意思"weight\o"control是什么意思"controlinyoungpeople.FamilyHistory.Parental\o"obesity是什么意思"obesitymorethandoublestheriskthatayoungchild,whetherthinoroverweight,willbecomeobeseasanadult.Inolderchildrenandteenagers,\o"obesity是什么意思"obesityinparentsstartstocountlessasapredictorforbody\o"weight是什么意思"weightthantheirownweight.Theriskmaybeduetoenvironmentalor\o"genetic是什么意思"geneticfactors,orboth.EthnicandSocioeconomicFactors.Asinadultpopulations,childrenfromlowersocioeconomicgroupsand\o"minority是什么意思"minoritypopulationsareathigherriskfor\o"obesity是什么意思"obesity.Forexample,amongyoungMexicanAmericansandAfricanAmericans,therehasbeenanincreaseinoverweightprevalenceofabout13%toover23%.FactorsSurroundingBirth.Thefollowingfactorssurroundingbirthareassociatedwithachild’s\o"weight是什么意思"weight:*Lowbirth\o"weight是什么意思"weightisarisk\o"factor是什么意思"factorforlater\o"obesity是什么意思"obesityand\o"diabetes是什么意思"diabetes.Onetheoryisthathumanshavea“thrifty\o"gene是什么意思"gene”thatproduces\o"metabolic是什么意思"metabolicchangesininfantswithlowbirth\o"weight是什么意思"weight.Suchchanges\o"affect是什么意思"affect\o"insulin是什么意思"insulinandfat\o"accumulation是什么意思"accumulationinorderto\o"produce是什么意思"producea“catch-up”weightintheseyoungchildrenasquicklyaspossible.Thisrapidweightgainininfancyincreasesthegainriskfor\o"obesity是什么意思"obesityinchildrenandalsoinyoungadulthood.*InastudyofAfricanAmericanchildren,havinganoverweightpregnantmotherincreasedtheriskforlater\o"weight是什么意思"weightgain,butlowbirthweightdidnot.Althoughsomesmallstudieshavereported\o"protection是什么意思"protectionagainst\o"obesity是什么意思"obesityfrombreastfeeding,\o"evidence是什么意思"evidenceisweak.Ina2003study,forexample,childrenwhowerebreastfedforthreetofivemonthshadalowerriskfor\o"obesity是什么意思"obesity,butprolongedbreastfeedinghadnoeffect.\o"Nevertheless是什么意思"Nevertheless,giventhehealthfuleffectsofbreastfeedingandthepossibilitythatitmayhaveevena\o"slight是什么意思"slight\o"impact是什么意思"impactonchildhoodobesity,itishighlyrecommended.HealthConsequencesofChildhoodObesityChildrenandadolescentswhoareobesehavepoorerhealththanotherchildren.Studiesarereporting\o"unhealthy是什么意思"unhealthycholesterollevelsandhighblood\o"pressure是什么意思"pressureinobesechildrenandadolescents.Ofgreat\o"concern是什么意思"concernisthe\o"dramatic是什么意思"dramaticincreaseintype2\o"diabetes是什么意思"diabetesinyoungpeople,whichismostcertainlylargelyduetotheincreasein\o"obesity是什么意思"obesity.\o"Obesity是什么意思"Obesityinchildrenisalsolinkedto\o"asthma是什么意思"asthma,gallbladderproblems,sleepapnea,andliverabnormalities.Childhoodobesitymaybepartlyresponsibleforthe\o"declining是什么意思"decliningagefor\o"onset是什么意思"onsetofpubertyingirls,withsubsequentrisksforbreastcancer.Itisnotclearyethowmanyofthesechildhoodproblems\o"persist是什么意思"persistinpeoplewho\o"achieve是什么意思"achieve\o"normal是什么意思"normal\o"weight是什么意思"weightasadults.Stayingoverweightintoadulthoodcertainlyconfershealthrisks.ManagingOverweightandObeseChildrenChildhood\o"obesity是什么意思"obesityisbesttreatedbyanon-drug,multidisciplinary\o"approach是什么意思"approachincludingdiet,behavior\o"modification是什么意思"modification,andexercise.Some\o"evidence是什么意思"evidencesuggeststhatreducingcaloriesbyonly200to260perdaywould\o"prevent是什么意思"prevent\o"weight是什么意思"weightgaininmostoverweightchildren.Heresometipsforchildrenwhoareoverweight:*Limitor\o"avoid是什么意思"avoidifpossibletake-out,fastfoods,high-sugarsnacks,\o"commercial是什么意思"commercialpackagedsnacks,sodaandsugarsweetenedbeverages(includingtoomuchjuice).*Letchildrensnackbutmakesurethesnacksarehealthy.Eatingsmall\o"frequent是什么意思"frequenthealthymeals(insteadoftwoorthreelargeones)hasbeenassociatedwithbeingthinnerandhavingabettercholesterolprofile.*Letchildrenchoosetheirownfoodportions.Onestudyindicatedthatchildrennaturallyate25%lessthantheychosetheirown\o"portion是什么意思"portionsize.Whentheyweregivenlargerportionstheirbitesizeswerelargerandtheyatemore.*Don’t\o"criticize是什么意思"criticizeachildforbeingoverweight.Itdoesnothelpandsuchattitudescouldputchildrenatriskforeatingdisorders,whichareequalorevengreaterdangerstohealth.*Limittelevision,videogames,andcomputerusetoafewhoursaweek.Thiscan\o"contribute是什么意思"contributesignificantlyto\o"weight是什么意思"weight\o"control是什么意思"control,regardlessofdietandphysicalactivity.*Foryoungchildren,trythetraffic-lightdiet.Foodis\o"designated是什么意思"designatedwithstoplightcolorsdependingontheirhighcaloric\o"content是什么意思"content:Greenforgo(lowcalories);yellowfor“eatwithcaution”(\o"medium是什么意思"mediumcalories);redfor“stop”(highcalories).*Tryalow-glycolic\o"index是什么意思"indexdiet.Thismaybeas\o"beneficial是什么意思"beneficialandpossiblymorethanastandardreduced-fatdietinobesechildren.Suchadietfocusesoncarbohydrates,suchasdriedbeansandsoy,thatraisebloodsugarmoreslowlythanothers.Thisdietissometimesusedin\o"diabetes是什么意思"diabetesandasadietary\o"approach是什么意思"approachinoverweightadults.1.OverweightchildrenarethosewhoseBMIisover85%ofthe\o"weight是什么意思"weightgroupintheirageandsexcategories.2.Theeducationalsystemispositiveinpromotingexerciseandhealthyfoods,accordingtothepassage.3.Itisobservedthatchildrenwatchingtelevisiononehourorlessaday\o"tend是什么意思"tendtobelesslikelytosufferfrom\o"obesity是什么意思"obesity.4.Theintakeofsugaramongchildrenisanimportantcontributortochildhood\o"obesity是什么意思"obesity.5.Inmostcases,obesechildren\o"tend是什么意思"tendtohaveparentssuffering\o"obesity是什么意思"obesity,asenvironmentalor\o"genetic是什么意思"geneticfactorsarethemajorreasonsforchildhood\o"obesity是什么意思"obesity.6.Infantswithlowbirth\o"weight是什么意思"weightmayfaceariskfor\o"obesity是什么意思"obesityastheygrowupintochildhoodandyoungadulthood.7.Forobesechildren,achievingahealthy\o"weight是什么意思"weightbecomesmoredifficultastheygetolder,asthe\o"persistence是什么意思"persistenceisbiological.8.Obesechildrenandadolescentshavepoorerhealth,astheyarereportedtohave\o"unhealthy是什么意思"unhealthy.9.Itissuggestedthatreducingcalorieswould\o"prevent是什么意思"prevent\o"weight是什么意思"weightgaininmostoverweightchildren.10.Theauthorbelievesthatitdoesnothelpto\o"criticize是什么意思"criticizechildrenforbeingoverweight,asthismayincreasetheriskfor.PartⅢListeningComprehension(35\o"minutes是什么意思"minutes)SectionADirections:Inthissection,youwillhear8shortconversationsand2longconversations.Attheendofeach\o"conversation是什么意思"conversation,oneormorequestionswillbeaskedaboutwhatwassaid.Boththeconversationandthequestionswillbespokenonlyonce.Aftereachquestiontherewillbeapause.Duringthepause,youmustreadthefourchoicesmarkedA),B),C)andD),anddecidewhichisthebestanswer.ThenmarkthecorrespondingletterontheAnswerSheet2withasinglelinethroughthecentre.11.A)Inapostoffice.B)Inanapartment.C)Inadepartmentstore.D)Inadrugstore.12.A)Togototheshops.B)Tolendhimherumbrella.C)Tosaysorrytohim.D)Tobuyapenforhim.13.A)ThesewatchesaremadeinSwitzerland.B)Thesewatchesarenewlymade.C)Mostpeoplecanaffordthesewatches.D)Noonewouldliketolivehere.14.A)Shetakesitasakindofexercise.B)Shewantstosavemoney.C)Shelovesdoinganythingthatisnew.D)Herofficeisn’tveryfaraway.15.A)Shopassistant.B)Atelephoneoperator.C)Awaitress.D)Aclerk.16.A)Shedoesn’tlookasyoungasshedidtenyearsago.B)Shehasnotchangedatall.C)Shewearsglassesandhasshorthair.D)Shewearslonghairandnolongerhasglasses.17.A)At8∶00.B)At7∶20.C)At7∶30.D)At7∶13.18.A)Becausehewouldgraduatefroma\o"school是什么意思"school.B)Becausehewantedtoenterauniversity.C)Becausehewassurehewouldgetthehighest\o"score是什么意思"score.D)Becausehewaslookingforajob.Questions19to22arebasedonthe\o"conversation是什么意思"conversationyouhavejustheard.19.A)Becauseherparentsloveherverymuch.B)Becauseherparentsneverforcehertodoanythingshedoesn’twanttodo.C)Becausesheisallowedtohavehercareer.D)Becauseshehastoomuchfreedom.20.A)Shedidn’tneedherparents’moneyanymore.B)Shebeginstogetonwellwithherparents.C)Shealwaysstayedwithherparents.D)Sherentedagovernmenthouseandlivedalone.21.A)TheyallowedhimtocometoEnglandimmediately.B)Theythoughtheshouldgoabroadasachild.C)Theywere\o"reluctant是什么意思"reluctantuntiltheirsonpersuadedthem.D)Theytriedto\o"control是什么意思"controlhisEnglishstudy.22.A)Thetwospeakersarefromdifferentcountries.B)Themangetsalongverywellwithhisparents.C)Britishparentsnever\o"interfere是什么意思"interferewiththeirchildren.D)Themandoesn’tlikehisparentsatall.Questions23to25arebasedonthe\o"conversation是什么意思"conversationyouhavejustheard.23.A)Hefailedinapowertestyesterday.B)Heneverexpectedhimselftobehappy.C)Itwasbecauseofhisfather’sfoot.D)Hemissedabout30\o"minutes是什么意思"minutesofaprogram.24.A)Hismother’suseofthewashingmachine.B)Hisfather’turningonthemicrowaveoven.C)HislonghoursofwatchingTV.D)The\o"switch是什么意思"switchonoftwoair-conditioners.25.A)Notuseanyelectricappliancesanymore.B)Takepartinabasketballfinal.C)Askhisneighborto\o"check是什么意思"checkthepower.D)Watchaballgametelevision.SectionBDirections:Inthissection,youwillhear3shortpassages.Attheendofeachpassage,youwillhearsomequestions.Boththepassageandthequestionswillbespokenonlyonce.Afteryouhearaquestion,youmustchoosethebestanswerfromthefourchoicesmarkedA),B),C)andD).ThenmarkthecorrespondingletterontheAnswerSheet2withasinglelinethroughthecentre.PassageOneQuestions26to28arebasedonthepassageyouhavejustheard.26.A)Coins.B)Salt.C)Animals.D)Cows.27.A)Romans.B)Americans.C)Indians.D)Chinese.28.A)Todaymostcoinsareround.B)Thingshighlyvaluedbyeverybodycouldserveasmoneyamong\o"primitive是什么意思"primitivepeople.C)Weknowverylittleaboutmoney.D)Howcoinscameintouse.PassageTwoQuestions29to31arebasedonthepassageyouhavejustheard.29.A)Millywasprobablyhersecretsweetheart.B)Thefarmerwas\o"threatening是什么意思"threateningher.C)Shewas\o"curious是什么意思"curiousaboutwhoMillywas.D)Shewasadoctor.30.A)Itwasraining.B)Itwasclear.C)Itwassnowing.D)Itwascloudy.31.A)Thefarmer’ssecretsweetheart.B)Thefarmer’smother.C)Thefarmer’swife.D)Thefarmer’ssister.PassageThreeQuestions32to35arebasedonthepassageyouhavejustheard.32.A)\o"Original是什么意思"Originalpaintings.B)Artbooks.C)Reproductionsoffamouspaintings.D)Handicrafts.33.A)Amethodofmakingtoys.B)Anewlibrarysystemforchildren.C)Amethodofsellingtoys.D)Anewlibrarysystemforadults.34.A)Atoylibrary.B)Asciencelibrary.C)Anartlibrary.D)Arecordlibrary.35.A)Bookstoread.B)Paintings.C)Aplacetoreceiveeducation.D)Aplacetomeetandplaywithotherchildren.SectionCDirections:Inthissection,youwillhearapassagethreetimes.Whenthepassageisreadforthefirsttime,youshouldlistencarefullyforitsgeneralidea.Whenthepassageisreadforthesecondtime,youarerequiredtofillintheblanksnumberedfrom36to43withtheexactwordsyouhavejustheard.Forblanksnumberedfrom44to46,youarerequiredtofillinthemissinginformation.Fortheseblanks,youcaneitherusetheexactwordsyouhavejustheardorwritedownthemainpointsinyourownwords.Finally,whenthepassageisreadforthethirdtime,youshould\o"check是什么意思"checkwhatyouhavewritten.Theautomobilehasmanyadvantages.Aboveall,it(36)peoplefreedomtogowheretheywanttogowhentheywanttogothere.Tomostpeople,carsarealsopersonal(37)machinesthatserveas(38)ofpower,success,speed,excitement,and(39).In(40),muchoftheworld’seconomyisbuiltonproducingvehiclesandsupplyingroads,services,andrepairsofvehicles.Halfoftheworld’spaychecksare(41).In\o"spite是什么意思"spiteoftheiradvantages,motorvehicleshavemanyharmfuleffectsonhumanlivesandonair,water,landandwildliferesources.Thoughwe(42)to\o"deny是什么意思"denyit,(43)incarsisoneofthemostdangerousthingswedoinourdailylives.Everyyear,(44),andtheyinjureor\o"permanently是什么意思"permanently\o"disable是什么意思"disabletenmillionmore.(45).Motorvehiclesarethelargestsourcesofair\o"pollution是什么意思"pollution,producingahazeofsmogovertheworld’scities.(46).PartⅣReadingComprehension(ReadinginDepth)(25\o"minutes是什么意思"minutes)SectionADirections:Inthissection,thereisapassagewithtenblanks.Youarerequiredtoselectonewordforeach\o"blank是什么意思"blankfromalistofchoicesgiveninawordbankfollowingthepassage.Readthepassagethroughcarefullybeforemakingyourchoices.Eachchoiceinthebankis\o"identified是什么意思"identifiedbyaletter.PleasemarkthecorrespondingletterforeachitemonAnswerSheet2withasinglelinethroughthecentre.Youmaynotuseanyofthewordsinthebankmorethanonce.Questions47to56arebasedonthefollowingpassage.The\o"comparatively是什么意思"comparativelytreelessplainsofNorthAfricahavesuffereda\o"progressive是什么意思"progressivedryingup,both47andman-made,buttheregionwas48sorichin\o"fertile是什么意思"fertilesoilthatthe\o"district是什么意思"districtwenowknowastheLibyan\o"Desert是什么意思"Desertwas,intheolddays,partofthegranary(糧倉(cāng))oftheRomanEmpire,andthecentreoftheSahara49abusytrading\o"population是什么意思"populationforalongperiod.Thatwaswhentherewere50inplentyandthefieldswerethe\o"traditional是什么意思"traditional“fieldsofthewoods”—clearingsintheforest—andthereforealwaystree51.Itisthetreesthatliftthewaterandsend52intotheairsothatitmayfallasdeworrainfurtheron.Treesreducethespeedofthewind,andprovide\o"shelter是什么意思"shelterand\o"shade是什么意思"shade;theroots53mineralsinthesoilandthesearecarriedtotheleaveswhich,whentheyhavefulfilledtheir\o"function是什么意思"function,returntotheearth,givingthesoilthe\o"combination是什么意思"combinationofmineralsthatplantsrequire.ButthroughtheagesAfricahasbeen54.Successiveinvadershavefelledtheforesttoprovide\o"grazing是什么意思"grazinglandsfortheirflocksandherds.Withtheremovalofthe\o"essential是什么意思"essentialtreecover,thewater55wasbroken,theearthbecamefeverishandsick,andincourseoftimewasunabletosupportthosewhohadbrokenthe56oflifebyremovingtheearth’sgreenmantle—thetrees.A)moistureB)cycleC)waterD)rhythmE)\o"contain是什么意思"containF)\o"trap是什么意思"trapG)onceH)surroundedI)fedJ)exploitedK)\o"social是什么意思"socialL)naturalM)forestN)usuallyO)treesSectionBDirections:Thereare2passagesinthissection.Eachpassageisfollowedbysomequestionsor\o"unfinished是什么意思"unfinishedstatements.ForeachofthemtherearefourchoicesmarkedA),B),C)andD).YoushoulddecideonthebestchoiceandmarkthecorrespondingletterontheAnswerSheet2withasinglelinethroughthecentre.PassageOneQuestions57to61arebasedonthefollowingpassage.Nooneknowswhenthefirst\o"calendar是什么意思"calendarwasdeveloped.Butitseemspossiblethatitwasbasedonlunarmonths.Whenpeoplestartedfarming,thesagesofthetribesbecameveryimportant,they\o"studied是什么意思"studiedtheskyandgatheredenoughinformationtobeableto\o"predict是什么意思"predictwhentheseasonswouldchange,andwereableto\o"announce是什么意思"announcewhenitwastimetoplantcrops.ThedivisionsoftimeweusetodayweredevelopedinancientBabylonia4,000yearsago.BabylonianastronomersbelievedthesunmovedaroundtheEarthevery365days.Theydividedthetripinto12equalparts,eachwith30days.Thentheydividedeachdayinto24equalparts,orhours,anddividedeachhourinto60\o"minutes是什么意思"minutes,each\o"minute是什么意思"minuteinto60seconds.Humanshaveusedmanydevicesto\o"measure是什么意思"measuretime;thesundial(日晷)wasoneoftheearliestandsimplest.However,thesundialworkedwellonlywhentheweatherwasfine,sootherwaysofmeasuringthepassingoftimewereinvented.One\o"device是什么意思"devicewasthehourglass(沙漏).Bytheeighteenthcentury,peoplehaddeveloped\o"mechanical是什么意思"mechanicalclocksandwatches.Sowehavedevicestomarkthepassingoftime,butwhattimeisitnow?Clocksindifferentpartsoftheworlddonotshowthesametimeatthesametime,becausetimeonEarthissetbythesun’spositionsintheskyaboveus.Asinternationalcommunicationsandtravelgrew,itbecameclearthatawaytoestablishacommontimeforallpartsoftheworldwasneeded.In1884,aninternational\o"conference是什么意思"conferencedividedtheworldinto24timezones,each\o"zone是什么意思"zonerepresentsonehour.The\o"astronomical是什么意思"astronomical\o"observatory是什么意思"observatoryinGreenwich,England,waschosenasthestartingpointforthetimezones.TwelvezonesarewestofGreenwich.Twelveareeast.ThetimeatGreenwich\o"measured是什么意思"measuredbythesunisconsideredbyastronomerstobe\o"Universal是什么意思"UniversalTime,alsoknownasGreenwich\o"Mean是什么意思"MeanTime.57.Whichofthefollowingisthebesttitleforthispassage?A)TheDevelopmentof\o"Universal是什么意思"UniversalTime.B)DifferentWaysto\o"Measure是什么意思"MeasureTime.C)WhyWe\o"Measure是什么意思"MeasureTimetheWayWedo.D)Howthe\o"Calendar是什么意思"CalendarCameintobeing.58.WhatdoestheexampleofBabyloniaastronomers\o"reveal是什么意思"reveal?A)ItrevealsBabylonians’wisdomthatwasabsentelsewhere.B)Itrevealstheoriginofourtimemeasurements.C)Itrevealsthelimitsofsometimemeasurements.D)Itrevealsthe\o"stability是什么意思"stabilityoftimemeasurements.59.Theauthormentionsallofthefollowingwaysto\o"measure是什么意思"measuretime\o"EXCEPT是什么意思"EXCEPT.A)sundialB)hourglassC)electricclockD)\o"mechanical是什么意思"mechanicalclock60.Accordingtothepassage,Greenwich\o"Mean是什么意思"MeanTime.A)providesacommontimeforallpartsoftheworldB)is\o"calculated是什么意思"calculatedfromthesunC)isthe12thofthe24timezonesD)wasnamedafteraninternationalconference61.Withwhichofthefollowingstatementswouldtheauthorbemostlikelytoagree?A)Timemeasurementshavechangedin\o"response是什么意思"responsetoneedandtechnologicaldevelopment.B)InancientBabylonia,12wasthebasicdivisionoftime.C)Thefirst\o"calendar是什么意思"calendarwasdevelopedbecausethesagesoftribeswere\o"intelligent是什么意思"intelligent.D)\o"Universal是什么意思"UniversalTimeissonamedbecauseitis\o"applicable是什么意思"applicablethroughoutthe\o"universe是什么意思"universe.PassageTwoQuestions62to66arebasedonthefollowingpassage.Formanyyears,scientistscouldn’t\o"figure是什么意思"figureouthowatomsand\o"molecules是什么意思"moleculesontheEarthcombinedtomakelivingthings.Plants,fish,dinosaurs,andpeoplearemadeofatomsandmolecules,buttheyareputtogetherinamore\o"complicated是什么意思"complicatedwaythanthemoleculesinthe\o"primitive是什么意思"primitiveocean.What’smore,livingthingshaveenergyandcan\o"reproduce是什么意思"reproduce,whilethechemicalsontheEarth4billionyearsagowerelifeless.Afteryearsofstudy,scientistsfiguredoutthatlivingthings,includinghumanbodies,arebasicallymadeofaminoacidsandnucleotidebases.Theseare\o"molecules是什么意思"moleculeswithmillionsof\o"hydrogen是什么意思"hydrogen,carbon,nitrogen,andoxygenatoms.Howcouldsuch\o"complicated是什么意思"complicatedmoleculeshavebeenformedinthe\o"primitive是什么意思"primitivesoup?Scientistswerestumped.Then,in1953,twoscientistsnamedHaroldUreyandStanleyL.\o"Miller是什么意思"Millerdidaverysimpleexperimenttofindoutwhathadhappenedonthe\o"Primitive是什么意思"PrimitiveEarth.Theysetupsometubesandbottlesinaclosedloop,andputinsomeofthesamegasesthatwerepresentintheatmosphere4billionyearsago:water\o"vapor是什么意思"vapor,ammonia,carbondioxide,methane,and\o"hydrogen是什么意思"hydrogen.Thentheyshotanelectric\o"spark是什么意思"sparkthroughthegasesto\o"simulate是什么意思"simulateboltsof\o"lightning是什么意思"lightningontheancientEarth,circulatedthegasesthroughsomewater,sentthembackformoresparks,andsoon.Aftersevendays,thewaterthatthegaseshadbeenbubblingthroughhadturnedbrown.Somenewchemicalswere\o"dissolved是什么意思"dissolvedinit.When\o"Miller是什么意思"MillerandUreyanalyzedthe\o"liquid是什么意思"liquid,theyfoundthatit\o"contained是什么意思"containedaminoacids—theverykindof\o"molecules是什么意思"moleculesfoundinalllivingthings.62.Whendidscientistscometorealizehowtheatomsand\o"molecules是什么意思"moleculesontheEarthcombinedtomakelivingthing?A)4billionyearsago.B)In1953.C)Aftersevendays.D)Manyyearslater.63.Scientistsfiguredoutthathumanbodiesarebasicallymadeof.A)aminoacidsB)moleculesC)\o"hydrogen是什么意思"hydrogen,carbon,nitrogenandoxygenatomsD)water\o"vapor是什么意思"vapor,ammonia,carbondioxide,methaneandhydrogen64.HaroldUreyandStanleyL.\o"Miller是什么意思"Millerdidtheirexperimentinorderto.A)findoutwhathadhappenedontheEarth4billionyearsagoB)\o"simulate是什么意思"simulateboltsof\o"lightning是什么意思"lightningontheancientEarthC)\o"dissolve是什么意思"