四级模拟题一Word格式.docx
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四级模拟题一Word格式.docx
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Orwerethesignalscomingfromaplanetthatbelongedtosomeotherstar?
Therewasnoendtothequestions,butthescientistskeptthenewssecret.“Perhapsthereareintelligentbeingsoutthere.”theythought,“whoaretryingtosendmessagestootherplanets,ortous?
Sothenewswasnotgiventothenewspaper.Instead,thescientistsstudiedthesignalsandsearchedforotherslikethem...Well,allthathappenedin1967and1968.Sincethenscientistshavelearntmoreaboutthosestrange,regular,radiosignals.Andtheyhavetoldthestory,ofcourse.
Thesignalsdonotcomefromaplanet;
theycomefromanewkindofstarcalleda“pulsar””.Aboutahundredotherpulsarshavenowbeenfound,andmostofthem areverylikethefirstone.
Pulsarsarestrongradiostars.Theyarethesmallestbuttheheavieststarsweknowatpresent.Ahandfulofpulsarwouldweighafewthousandtons.Theirlight—iftheygivemuchlight—istoosmallforustosee.Butwecanbesureofthis,nointelligentbeingsarelivingonthem.
21.Theradiosignalsdiscussedinthispassage____.
A.wereregularB.werecontrolledbyaclock
C.wereheardin1967onlyD.weresecretmessages
22.Theradiosingalsweresentby____.
A.asatelliteB.aplanet
C.askybodywhichwasunknownatthattime
D.intelligentbeingswhowereunknownatthattime
23.Thescientistsdidnottellpeopleaboutthesignalsbecause____.
A.thesingalsstoodforsecretmessages
B.peoplewouldaskthemtoomanyquestions
C.theydidnotwanttofrightenpeople
D.theystoodforunimportantmessages
24.Apulsaris____.
A.asmallheavystarwhichsendsoutstrongradiosignalsandcannotbeseen
B.asmallheavyplanetwhichsendsoutstrongradiosignalsandcannotbeseen
C.asmallheavysatellitewhichsendsoutstrongradiosignalsandcannotbeseen
D.asmallintelligentbeingwhosendsoutstrongradiosignalsandcannotbeseen
25.Whichofthefollowingistrue?
A.Oneofthepulsarsfoundbyscientistssendsradiosignals.
B.Pulsarbegantosendradiosingalsin1967.
C.Scientistshavesearchedforpulsarsformanyyearsbutfoundnone.
D.Scientistshavefoundmanypulsarssince1967.
rnlifeandancientlife.
27.“oneoutofseven”refersto____.
A.morethanathirdofthelands'
earth
B.thepercentageoftheearth'
slandthatisdesert-like
C.thenumberofpeoplewholiveindryregions
D.adayofaweek
28.Inparagraph2,“theyaretakentothegreenerlandsinthesouth.”They refersto____.
A.theSahelfarmlandB.thefarmers
C.thecattlesD.thetrees
29.Howmanyideasforsavingthelandaredescribed?
A.Five.B.Two.
C.Four.D.Three.
30.Whichofthefollowingstatementsistrue,accordingtothepassage?
A.Theearth'
sdesertareslowlyspreading.
B.Oneoutof10peoplelivesindryregions.
C.Theirlifeinthedesertisthreatenednowbytraditionalproblems.
D.NewwaterwellscansolvetheprobleminAfrica'
sdesert.
Questions31to35arebasedonthefollowingpassage:
Telephone,television,radio,andtelegraphallhelppeoplecommunicatewith eachother.Becauseofthesedevices,ideasandnewsofeventsspreadquicklyall overtheworld.Forexample,withinseconds,peoplecanknowtheresultsofan electioninanothercountry.Aninternationalfootballmatchcomesintothehomes ofeveryonewithatelevisionset.Newsofadisastersuchasanearthquakeora floodcanbringhelpfromdistantcountrieswithinhours,helpisontheway.Becauseofmoderntechnologylikethesatellitesthattravelaroundtheworld,informationtravelsfast.
Howhasthisspeedofcommunicationchangedtheworld?
Tomanypeople,theworldhasbecomesmaller.Ofcoursethisdoesnotmeanthattheworldisactuallyphysicallysmaller.Itmeansthattheworldseemssmaller.Twohundredyearsago,communicationbetweenthecontinentstookalongtime.Allnewswascarriedonshipsthattookweeksorevenmonthstocrosstheocean.Intheseventeenthandeighteenthcenturies,ittooksixweeksfornewsfromEuropetoreachAmerica.Thistimedifferenceinfluencedpeople'
sactions.Forexample,onebattle,orfight,intheWarof1812betweenEnglandandtheUnitedStatescouldhavebeenavoided.Apeaceagreementhadalreadybeensigned.PeacewasmadeinEngland,butthenewsofpeacetooksixweekstoreachAmerica.Duringthesesixweeks,thelargeandseriousBattleofNewOrleanswasfought.Manypeoplelosttheirlivesafterapeacetreatyhadbeensigned.Theywouldnothavediedifnewshadcomeintime.Inthepast,communicationtookmuchtimethanitdoesnow.
Therewasagoodreasonwhytheworldseemedsomuchlargerthanitdoestoday.
31.Newsspreadsfastbecauseof____.
A.moderntransportationB.newtechnology
C.thechangeoftheworldD.apeaceagreement
32.Accordingtothispassage,____isveryimportanttopeopleinadisasterarea.
A.fastcommunicationB.moderntechnology
C.latestnewsD.newideas
33.Whichofthefollowingstatementsistrue?
A.Theworldnowseemssmallerbecauseoffastercommunication.
B.Theworldisactuallysmallertoday.
C.Theworldischangingitssize.
D.ThedistancebetweenEnglandandAmericahaschangedsincetheWarof1812
34.Twohundredyearsago,newsbetweenthecontinentswascarried____.
A.bytelephoneandtelegraphB.byland
C.byairD.bysea
35.TheNewOrleansBattlecouldhavebeenavoidedifthepeaceagreementhadbeensigned____.
A.bybothsidesB.intime
C.inAmericaD.inEngland
Questions36to40arebasedonthefollowingpassage:
Theconceptofpersonalchoiceinrelationtohealthbehaviorsisanimportantone.Anestimated90percentofallillnessesmaybepreventableifindividualswouldmakesoundpersonalhealthchoicesbaseduponcurrentmedicalknowledge.
Weallenjoyourfreedomofchoiceanddonotliketoseeitrestrictedwhenitiswithinthelegalandmoralboundariesofsociety.[ZZ)]ThestructureofAmericansocietyallowsustomakealmostallourownpersonaldecisionsthatmayconcernourhealth.Ifwesodesire,wecansmoke,drinkexcessively,refusetowearseat belts,eatwhateverfoodswewant,andliveacompletelysedentarylife-stylewithoutanyexcuse.Thefreedomtomakesuchpersonaldecisionsisafundamentalaspectofoursociety,althoughthewisdomofthesedecisionscanbequestioned.Personalchoicesrelativetohealthoftencauseadifficulty.Asoneexample,ateenagermayknowthefactsrelativetosmokingcigarettesandhealthbutmaybepressuredbyfriendsintobelievingitisthesociallyacceptedthingtodo.Amultitudeoffactors,bothinheritedandenvironmental,influencethedevelopmentofhealthrelatedbehaviors,anditisbeyondthescopeofthistexttodiscussallthesefactorsastheymayaffectanygivenindividual.However,thedecisiontoadoptaparticularhealth-relatedbehaviorisusuallyoneofpersonalchoices.
Therearehealthychoicesandthereareunhealthychoices.Indiscussingthemoralofpersonalchoice,FriesandCrapodrewacomparison.[ZZ(Z]Theysuggestthattoknowinglygiveoneselfovertoabehaviorthathasastatisticalprobabilityofshorteninglifeissimilartoattemptingsuicide.[ZZ)]Thus,forthoseindividuals whoareinterestedinpreservingboththequalityandquantityoflife,personalhealthchoicesshouldreflectthosebehaviorsthatareassociatedwithstatisticalprobabilityofincreasedvitalityandlongevity.
36.Theconceptofpersonalchoiceconcerninghealthisimportantbecause____.
A.personalhealthchoiceshelpcuremostillnesses
B.ithelpsraisethelevelofourmedicalknowledge
C.itisessentialtopersonalfreedominAmericansociety
D.wrongdecisionscouldheadtopoorhealth
37.To“liveacompletelysedentarylifestyle”(Para.1)inthepassagemeans____.”
A.toliveaninactivelifeB.toliveadecentlife
C.tolivealifewithcompletefreedom
D.tolivealifeofvice
38.Soundpersonalhealthchoiceisoftendifficulttomakebecause____.
A.currentmedicalknowledgeisstillinsufficient
B.therearemanyfactorsinfluencingourdecisions
C.fewpeoplearewillingtotradethequalityoflifeforlongevity
D.peopleareusuallyinfluencedbythebehavioroftheirfriends
39.ToknowinglyallowoneselftopursueunhealthyhabitsiscomparedbyFriesandCrapoto____.
A.improvingthequalityofone'
slife
B.limitingone'
spersonalhealthchoice
C.deliberatelyendingone'
D.breakingtherulesofsocialbehavior
40.AccordingtoFriesandCraposoundhealthchoicesshouldbebasedon____.
A.personaldecisionsB.lawsofsociety
C.statisticalevidenceD.opinionsoffriends
PartⅢVocabularyandStructure(20minutes)
Thereare30incompletesentencesinthispart.ForeachsentencetherearefourchoicesmarkedA),B),C)andD).ChoosetheONEanswerthatbestcompletesthesentence.Thenmarkthe
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