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1、2012年6月全国大学英语六级考试试卷PartⅣReadingComprehension(ReadinginDepth)(25minutes) SectionA Directions:Inthissection,thereisashortpassagewith5questionsorincompletestatements.Readthepassagecarefully.Thenanswerthequestionsorcompletethestatementsinthefewestpossiblew
2、ords.PleasewriteyouranswersonAnswerSheet2 Questions47to51arebasedonthefollowingpassage. Infaceofglobalwarming,muchefforthasbeenfocusedonreducinggreenhousegasemissionsthroughavarietyofstrategies.Butwhilemuchoftheresearchandinnovationhasconcentratedonfin
3、dingless-pollutingenergyalternatives,itmaybedecadesbeforecleantechnologieslikewindandsolarmeetasignificantportionofourenergyneeds. Inthemeantime,theamountofCO2intheairisrapidlyapproachingthelimitsproposedbytheIntergovernmentalPanelonClimateChange(IPCC).
4、“Aslongaswe’reconsumingfossilfuels,we’reputtingoutCO2,”saysKlausLackner,ageophysicistatColumbia,University”WecannotlettheCO2intheatmosphereriseindefinitely.” ThatsenseofurgencyhasincreasedinterestincapturingandstoringCO2,whichtheIPCCsayscouldprovidethem
5、orethan50%reductioninemissionsthoughtneededtoreduceglobalwarming.“Weseethepotentialforcaptureandstoragetoplayanintegralroleinreducingemissions,”saysKimCorley,Shell’ssenioradvisorofCO2andenvironmentalaffairs.Thatforwardthinkingstrategyisgainingsupport.The
6、U.S.DepartmentofEnergyrecentlyproposedputting$1billionintoanew$2.4billioncoal-burningenergyplant.Theplant’scarbon-capturetechnologieswouldserveasapilotprojectforothernewcoal-burningplants. Butwhatdoyoudowiththegasonceyou’vecapturedit?Oneoptionistoputitt
7、onewuses.DakotaGasificationofNorthDakotacapturesCO2ataplantthatconvertscoalintosyntheticnaturalgas.Itthenshipsthegas200milesbypipelinetoCanada,whereitispumpedundergroundinoilrecoveryoperations.IntheNetherlands,ShelldeliversCO2tofarmerswhopipeitintotheirg
8、reenhouses,increasingtheiryieldoffruitsandvegetables. However,scientistssaythatthescaleofCO2emissionswillrequirevastamountsoflong-termstorage.SomeproposestoringtheCO2incoalminesorliquidstorageintheocean,Shellfavorsstoring
