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1、实用文档英语四级阅读题库含答案解析1.PassageOneGlobalwarmingmayormaynotbethegreatenvironmentalcrisisofthe21stcentury,butregardlessofwhetheritisorisn’t–wewon’tdomuchaboutit.Wewillargueoveritandmayeven,asanation,makesomefairlysolemn-soundingcommitmentstoavoidit.Butthemoredramaticandmeaningfulthesecomm
2、itmentsseem,thelesslikelytheyaretobeobserved.AlGorecallsglobalwarmingan“inconvenienttruth,”asifmerelyrecognizingitcouldputusonapathtoasolution.Buttherealtruthisthatwedon’tknowenoughtorelieveglobalwarming,and–withoutmajortechnologicalbreakthroughs—wecan’tdomuchaboutit.From2003to2050
3、,theworld’spopulationisprojectedtogrowfrom6.4billionto9.1billion,a42%increase.Ifenergyuseperpersonandtechnologyremainthesame,totalenergyuseandgreenhousegasemissions(mainly,CO2)willbe42%higherin2050.butthat’stoolow,becausesocietiesthatgrowricherusemoreenergy.Weneedeconomicgrowthunle
4、sswecondemntheworld’spoortotheirpresentpovertyandfreezeeveryoneelse‘slivingstandards.Withmodestgrowth,energyuseandgreenhouseemissionsmorethandoubleby2050.Nogovernmentwilladoptrigidrestrictionsoneconomicgrowthandpersonalfreedom(limitsonelectricityusage,drivingandtravel)thatmightcutb
5、ackglobalwarming.Still,politicianswanttoshowthey’re“doingsomething.”ConsidertheKyotoProtocol(京都议定书).Itallowedcountriesthatjoinedtopunishthosethatdidn’t.Butithasn’treducedCO2emissions(upabout25%since1990),andmanysignatories(签字国)didn’tadopttoughenoughpoliciestohittheir2008-2012target
6、s.Thepracticalconclusionisthatifglobalwarmingisapotentialdisaster,theonlysolutionisnewtechnology.Onlyanaggressiveresearchanddevelopmentprogrammightfindwaysofbreakingdependenceonfossilfuelsordealingwithit.Thetroublewiththeglobalwarmingdebateisthatithasbecomeamoralproblemwhenit’sreal
7、lyanengineeringone.Theinconvenienttruthisthatifwedon’tsolvetheengineeringproblem,we’rehelpless.57.Whatissaidaboutglobalwarminginthefirstparagraph?文案大全实用文档A)Itmaynotproveanenvironmentalcrisisatall.B)Itisanissuerequiringworldwidecommitments.文案大全实用文档C)Seriousstepshavebeentakentoavoido
8、rstopit.D)Verylittlewillbe
