英语四级阅读题库含答案解析.docx

精品文库 英语四级阅读题库含答案解析 1.PassageOne Globalwarmingmayormaynotbethegreatenvironmentalcrisisofthe21 st century, butregardlessofwhetheritisorisn ’t –wewon ’tdomuchaboutit. Wewillargueover itandmayeven,asanation,makesomefairlysolemn-soundingcommitmentstoavoid it.Butthemoredramaticandmeaningfulthesecommitmentsseem,thelesslikelythey aretobeobserved. AlGorecallsglobalwarmingan “inconvenienttruth, ”asifmerelyrecognizingit couldputusonapathtoasolution.Buttherealtruthisthatwedon ’tknowenoughto relieveglobalwarming,and –withoutmajortechnologicalbreakthroughs —wecan’tdo muchaboutit. From2003to2050,theworld ’spopulationisprojectedtogrowfrom6.4billionto9.1 billion,a42%increase.Ifenergyuseperpersonandtechnologyremainthesame,total energyuseandgreenhousegasemissions(mainly,CO2)willbe42%higherin2050.but that’stoolow,becausesocietiesthatgrowricherusemoreenergy.Weneedeconomic growth unless we condemnthe world ’spoor to their present poverty and freeze everyone else‘sliving standards. With modest growth, energy use and greenhouse emissionsmorethandoubleby2050. Nogovernment will adopt rigid restrictions on economic growthand personal freedom (limits on electricity usage, driving andtravel) that might cut back global warming.Still,politicianswanttoshowthey ’re“doingsomething. ”Considerthe Kyoto Protocol (京都议定书).Itallowedcountriesthatjoinedtopunishthosethatdidn ’t.Butit hasn’treducedCO2emissions(upabout25%since1990),andmany signatories (署名 国)didn’tadopttoughenoughpoliciestohittheir2008-2012targets. The practical conclusion isthat if global warming is apotential disaster, the only solution is new technology. Only an aggressive research and development program mightfindwaysofbreakingdependenceonfossilfuelsordealingwithit. Thetroublewiththeglobalwarmingdebateisthatithasbecomeamoralproblemwhen it’sreally anengineering one.The inconvenient truth is that ifwe don’t solvethe engineeringproblem,we ’rehelpless. 57.Whatissaidaboutglobalwarminginthefirstparagraph? A)Itmay not prove an environmental B)It i