【课堂新坐标】2016-2017学年高中英语人教版选修九单元综合测评4 Word版含答案

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1、英语备课大师en.eywedu.net【全免费】单元综合测评（四）(时间：100分钟；满分：120分)Ⅰ.阅读理解(共15小题；每小题2分，满分30分)APlantsarefloweringfasterthanscientistspredicted(预测)inreactiontoclimatechange,whichcouldhavelongdamagingeffectsonfoodchainsandecosystems.Globalwarmingishavingagreateffectonhundredsofplantandanimalspeciesarou

2、ndtheworld,changingsomelivingpatterns,scientistssay.Increasedcarbondioxide(CO2)intheairfromburningcoalandoilcanhaveaneffectonhowplantsproduceoxygen,whilehighertemperaturesandchangeablerainfallpatternscanchangetheirpatternsofgrowth.“Predictingspecies'reactiontoclimatechangeisamajorch

3、allengeinecology，”saidtheresearchersofseveralU．S.universities.Theysaidplantshadbeenthekeyobjectofstudybecausetheirreactiontoclimatechangecouldhaveaneffectonfoodchainsandecosystemservices.Thestudy,publishedontheNaturewebsite,usesthefindingsfromplantlifecyclestudiesandexperimentsacros

4、sfourcontinentsand1，634species.Itfoundthatsomeexperimentshadunderestimated(低估)thespeedoffloweringby8.5timesandleafingby4times.“Acrossallspecies,theexperimentsunderpredictedthespeedoftheadvance－forbothleafingandflowering－thatresultsfromtemperatureincreases，”thestudysaid.Thedesignoffu

5、tureexperimentsmayneedtobeimprovedtobetterpredicthowplantswillreacttoclimatechange,itsaid.PlantsarenecessaryforlifeontheEarth.Theyarethebaseofthefoodchain,usingphotosynthesis(光合作用)toproducesugarfromcarbondioxideandwater.Theyletoutoxygenwhichisneededbynearlyeveryorganismontheplanet.S

6、cientistsbelievetheworld'saveragetemperaturehasrisenbyabout0.8℃since1900,andnearly0.2℃everytenyearssince1979.Sofar,effortstocutemissions(排放)ofplanetwarminggreenhousegasesarenotseenasenoughtopreventtheEarthheatingupbeyond2℃thiscentury－apoint“备课大师”全科【9门】：免注册，不收费！http://www.eywedu.cn/英

7、语备课大师en.eywedu.net【全免费】scientistssaywillbringthedangerofachangeableclimateinwhichweatherextremesarecommon,leadingtodrought,floods,cropfailuresandrisingsealevels.【语篇解读】　本文为科普类文章。文章论述了全球变暖的气候环境会让植物提前开花，进而影响整个食物链及生态系统。1．WhatisthekeyinformationtheauthorwantstogiveinParagraph1?A．Plants'r

8、eactiontoweathercou