英语四级阅读理解训练附答案优秀模板三篇.docx
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英语四级阅读理解训练附答案优秀模板三篇.docx
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英语四级阅读理解训练附答案优秀模板三篇
2020英语四级阅读理解训练附答案优秀模板三篇
2020英语四级阅读理解训练附答案
(1)
Ifthepopulationoftheearthgoesonincreasingatitspresentrate,therewilleventuallynotbeenoughresourceslefttosustainlifeontheplanet.Bythemiddleofthe21stcentury,ifpresenttrendscontinue,wewillhaveusedupalltheoilthatdrivesourcars,forexample.Evenifscientistsdevelopnewwaysoffeedingthehumanrace,thecrowdedconditionsonearthwillmakeitnecessaryforlustolookforopenspacesomewhereelse.Butnoneoftheotherplanetsinoursolarsystemarecapableofsupportinglifeatpresent.Onepossiblesolutiontotheproblem,however,hasrecentlybeensuggestedbyAmericanscientist,ProfessorCarlSagan.
SaganbelievesthatbeforetheearthsresourcesarecompleetelyexhausteditwillbepossibletochangetheatmophereofVenusandsocreateanewworldalmostaslargeasearthitself.ThedifficultisthatVenusismuchhotterthantheearthandthereisonlyatinyamountofwaterthere.
Saganproposesthatalgaeorganismsthatcanliveinextremelyhotorcoldatmospheresandatthesametimeproduceoxygen,shouldbebredinconditionsimilartothoseonVenus.Assoonasthishasbeendone,thealgaewillbeplacedinsmallrockets.SpaceshipwillthenflytoVenusandfiretherocketsintotheatmosphere.Inafairlyshorttime,thealgewillbreakdownthecarbondioxideintooxygenandcarbon.
Whenthealgaehavedonetheriwork,theatmospherewillbecomecooler,butbeformancansetfootonVenusitwillbeneccessaryfortheoxygentoproducerain.ThesurfaceoftheplanetwillstillbetoohotformantolandonitbuttherainwilleventuallyfallandinafewyearssomethinglikeearthwillbereproducedonVenus.
1.Intelongrun,themostinsolubleproblemcausedbypopulationgrowthonearthwillprobablybethelackof______.
a.foodb.oilc.spaced.resources
2.CarlSaganbelievesthatVenusmightbecolonizedfromearthbecause_____
a.itmightbepossibletochangeitsatmosphere
b.itsatmosphereisthesameastheearths
c.thereisagoodsupplyofwateronVenus
d.thedaysonVenusarelongenough
3.OnVenusthereisalotof________.
a.waterb.carbondioxidec.carbonmonoxided.oxygen
4.Algaeareplantsthatcan____.
a.liveinveryhottemperaturesb.liveinverycoldtemperatures
c.manufactureoxygend.alloftheabove
5.MancanlandonVenusonlywhen_______.
a.thealgaehavedonetheirworkb.theatmospherebecomescooler
c.thereisoxygend.itrainsthere
答案:
cabdd
2020英语四级阅读理解训练附答案
(2)
TheUnitedStatesisonthevergeoflosingitsleadingplaceintheworldstechnology.Sosaysmorethanonestudyinrecentyears.OneofthereasonsforthisdeclineistheparalleldeclineinthenumberofU.S.scientistsandengineers.
Since1976,employmentofscientistsandengineersisup85percent.Thistrendisexpectedtocontinue.However,thetrendshowsthatthenumberof22-year-olds--theneartermsourceoffuturePH.D.s-isdeclining.Furtheraddingtotheproblemistheincreasedcompetitionforthesecandidatesfromotherfields-law,medicine,business,etc.WhilethenumberofU.S.PH.D.sinscienceandengineeringdeclines,theawardofPH.D.stoforeignnationalsisincreasingrapidly.
OurinabilitytomotivatestudentstopursuescienceandengineeringcareersatthegraduateleveliscompoundedbecauseoftheintensedemandindustryhasforbrightBachelorsandMastersdegreeholders.Toooften,promisingPH.D.candidates,confrontingthecostandfinancialsacrificeofpursuingtheireducation,findtheattractionofindustryirresistible.
1.TheU.S.willcometoloseitsleadingplaceintechnologyprobablybecause________.
a.thenumberofPH.D.degreeholdersisdeclining
b.thenumberofscientistsandengineersisdecreasing
c.thenumberof22-year-ildsisdeclining
d.scientistsandengineersarenotemployed
2.Thefieldofscienceandengineeringisfacingacompetitionfrom________.
a.technologyb.foreignnationals
c.suchfieldsaslaw,medicineandbusinessd.postgraduates
3.Large-scaleenterprisesnowneed_______.
a.brightgraduatesandpostgraduatesb.newinventions
c.advancedtechnologyd.engineers
4.ManypromisingpostgraduatesareunwillingtopursueaPH.D.degreebecause_________.
a.theyarenotencouragedtobeengagedinscience
b.industrydoesnotrequirePH.D.holders
c.theyhavefinancialdifficulties
d.theywillspendmuchtimeandenergycompletingPH.D.
5.PH.D.candidatesfindtheattractionofindustryirresistiblemeansthat_________.
a.theyfindindustryisattractingmoreandmorecollegestudents
b.theydontthinktheycanpreventthemselvesfromworkingforindustry
c.theycannotresistanyattractionfromallsides
d.theycannotworkforindustryanylonger
答案:
bcadb
2020英语四级阅读理解训练附答案(3)
Therearethreekindsofgoals:
short-term,medium-rangeandlong-termgoals.
Short-rangegoalsarethosethatusuallydealwithcurrentactivities,whichwecanapplyonadailybasis.Suchgoalscanbeachievedinaweekorless,ortwoweeks,orpossiblemonths.Itshouldberememberedthatjustasabuildingisnostrongerthanitsfoundation,outlong-termgoalscannotamounttoverymunchwithouttheachievementofsolidshort-termgoals.Uponcompletingourshort-termgoals,weshoulddatetheoccasionandthenaddnewshort-termgoalsthatwillbuildonthosethathavebeencompleted.
Theintermediategoalsbukldonthefoundationoftheshort-rangegoals.Theymightdealwithjustonetermofschoolortheentireschoolyear,ortheycouldevenextendforseveralyears.Anytimeyoumoveastepatatime,youshouldneverallowyourselftobecomediscouragedoroverwhelmed.Asyoucompleteeachstep,youwillenforcethebeliefinyourabilitytogrowadnsucceed.Andasyourlistofcompletiondatesgrow,yourmotivationanddesirewillincrease.
Long-rangegoalsmayberelatedtoourdreamsofthefuture.Theymightcoverfiveyearsormore.Lifeisnotastaticthing.Weshouldneverallowalong-termgoaltolimitusorourcourseofaction.
1.Ourlong-termgoalsmeanalot__.
a.ifwecompleteourshort-rangegoals
b.ifwecannotreachsolidshort-termgoals
c.ifwewritedownthedates
d.ifweputforwardsomeplans
2.Newshort-termgoalsarebulidupon__.
a.twoyears
b.long-termgoals
c.currentactivities
d.thegoalsthathavebeencompleted
3.Whenwecompleteeachstepofourgoals,__.
a.wewillwinfinalsuccess
b.weareoverwhelmed
c.weshouldbuildupconfidenceofsuccess
d.weshouldstrongdesireforsettingnewgoals
4.Onceourgoalsaredrawnup,__.
a.weshouldsticktothemuntilwecompletethem
b.wemaychangeourgoalsaswehavenewideasandopportunities
c.wehadbetterwaitfortheexcitingnewsofsuccess
d.wehavemadegreatdecision
5.Itisimpliedbutnotstatedinthepassagethat___.
a.thosewhohabelong-termgoalswillsucceed
b.writingdownthedatesmaydiscourageyou
c.thegoalisonlyaguideforustoreachourdesination
d.everyshouldhaveagoal
答案:
adcbc
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