高三英语阅读理解(科普环保)易错剖析.doc

高三英语阅读理解(科普环保)易错剖析

一、高中英语阅读理解科普环保类
1．犇犇阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。
AgainstthesuppositionthatforestfiresinAlaska,CanadaandSiberiawarmtheclimate,scientistshavediscoveredthatcoolingmayoccurinareaswhereburnttreesallowmoresnowtomirrormoresunlightintospace.
Thisfindingsuggeststhattakingstepstopreventnorthernforesttolimitthereleaseofgreenhousegasesmaywarmtheclimateinnorthernregions.Usuallylargefiresdestroyedforestsintheseareasoverthepastdecade.Scientistspredictthatwithclimatewarming,firesmayoccurmorefrequentlyovernextseveralcenturiesasaresultofalongerfireseason.Sunlighttakeninbytheearthtendstocausewarming,whileheatmirroredbackintospacetendstocausecooling.
Thisisthefirststudytoanalyzeallaspectsofhownorthernfiresinfluenceclimate.Earlierstudiesbyotherscientistshavesuggestedthatfireinnorthernregionsspeedupclimatewarmingbecausegreenhousegasesfromburningtreesandplantsarereleasedintotheatmosphereandthustrapheat.
Scientistsfoundthatrightafterthefire,largeamountsofgreenhousegasesenteredtheatmosphereandcausedwarming.Ozone(臭氧)levelsincreased,andashfromthefirefellonfar-offseaice,darkeningthesurfaceandcausingmoreradiationfromthesuntobetakenin.Thefollowingspring,however,thelandwithintheareaofthefirewasbrighterthanbeforethefire,becausefewertreescoveredtheground.Snowonthegroundmirroredmoresunlightbackintospace,leadingtocooling.
"Weneedtofindoutallpossiblewaystoreducethegrowthofgreenhousegasesintheatmosphere."Scientiststrackedthechangeinamountofradiationenteringandleavingtheclimatesystemasaresultofthefire,andfoundameasurementcloselyrelatedtotheglobalairtemperature.Typically,fireinnorthernregionsoccursinthesameareaevery80to150years.Scientists,however,foundthatwhenfireoccursmorefrequently,moreradiationislostfromtheearthandcoolingresults.Specifically,theydeterminedwhenfirereturns20yearsearlierthanpredicated,0.5wattspersquaremeterofareaburnedaresoakedupbytheearthfromgreenhousegases,but0.9wattspersquaremeterwillbesentbackintospace.Theneteffectiscooling.Wattsareusedtomeasuretherateatwhich