资源描述：
《高二升高三 英语 阅读专练之说明文 教师版》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、高二升高三英语阅读专练之说明文、议论文及应用文（一）2012四川EPlantsarefloweringfasterthanscientistspredicted（预测）inreactiontoclimatechange,whichcouldhavelongdamagingeffectsonfoodchainsandecosystems.Globalwarmingishavingagreateffectonhundredsofplantandanimalspeciesaroundtheworld,changings
2、omelivingpatterns,scientistssay.Increasedcarbondioxide（CO2）intheairfromburningcoalandoilcanhaveaneffectonhowplantsproduceoxygen,whilehighertemperaturesandchangeablerainfallpatternscanchangetheirpatternsofgrowth.Xkb1.cm“Predictingspecies’reactiontoclimatechang
3、eisamajorchallengeinecology,”saidtheresearchesofseveralU.S.universities.Theysaidplantshadbeenthekeyobjectofstudybecausetheirreactiontoclimatechangecouldhaveaneffectonfoodchainsandecosystemservices.Thestudy,publishedontheNaturewebsite,usesthefindingsfromplantl
4、ifecyclestudiesandexperimentsacrossfourcontinentsand1,634species.Itfoundthatsomeexperimentshadunderestimated（低估）thespeedoffloweringby8.5timesandleafingby4times.“Acrossallspecies,theexperimentsunder-predictedthespeedoftheadvance—forbothleafingandflowering—that
5、resultsfromtemperatureincreases,”thestudysaid.Thedesignoffutureexperimentsmayneedtobeimprovedtobetterpredicthowplantswillreacttoclimatechange,itsaid.PlantsarenecessaryforlifeontheEarth.Theyarethebaseofthefoodchain,usingphotosynthesis（光合作用）toproducesugarfromca
6、rbondioxideandwater.Theyletoutoxygenwhichisneededbynearlyeveryorganismontheplanet.Scientistsbelievetheworld’saveragetemperaturehasrisenbyabout0.8℃since1900,andnearly0.2℃everytenyearssince1979.Sofar,effortstocutemissions（排放）ofplanet-warminggreenhousegasesareno
7、tseenasenoughtopreventtheEarthheatingupbeyond2℃thiscentury—apointscientistssaywillbringthedangerofachangeableclimateinwhichweatherextremesarecommon,leadingtodrought,floods,cropfailuresandrisingsealevels.57.WhatisthekeyinformationtheauthorwantstogiveinParagrap
8、h1?A.Plants’reactiontoweathercouldhavedamagingeffectsonecosystem.B.Theincreasingspeedoffloweringisbeyondscientists’expectation.C.Climatechangeleadstothechangeoffoodproductionpatterns.D.Fo
