课堂新坐标2016_2017学年高中英语unit4exploringplanets单元综合测评新人教版

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1、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.Globalwarmingishavingagreateffectonhundredsofplantandanimalspecie

2、saroundtheworld,changingsomelivingpatterns,scientistssay.Increasedcarbondioxide(CO2)intheairfromburningcoalandoilcanhaveaneffectonhowplantsproduceoxygen,whilehighertemperaturesandchangeablerainfallpatternscanchangetheirpatternsofgrowth.“Predictingspecies

3、'reactiontoclimatechangeisamajorchallengeinecology，”saidtheresearchersofseveralU．S.universities.Theysaidplantshadbeenthekeyobjectofstudybecausetheirreactiontoclimatechangecouldhaveaneffectonfoodchainsandecosystemservices.Thestudy,publishedontheNaturewebs

4、ite,usesthefindingsfromplantlifecyclestudiesandexperimentsacrossfourcontinentsand1，634species.Itfoundthatsomeexperimentshadunderestimated(低估)thespeedoffloweringby8.5timesandleafingby4times.“Acrossallspecies,theexperimentsunderpredictedthespeedoftheadvanc

5、e－forbothleafingandflowering－thatresultsfromtemperatureincreases，”thestudysaid.Thedesignoffutureexperimentsmayneedtobeimprovedtobetterpredicthowplantswillreacttoclimatechange,itsaid.PlantsarenecessaryforlifeontheEarth.Theyarethebaseofthefoodchain,usingph

6、otosynthesis(光合作用)toproducesugarfromcarbondioxideandwater.Theyletoutoxygenwhichisneededbynearlyeveryorganismontheplanet.Scientistsbelievetheworld'saveragetemperaturehasrisenbyabout0.8℃since1900,andnearly0.2℃everytenyearssince1979.Sofar,effortstocutemissi

7、ons(排放)ofplanetwarminggreenhousegasesarenotseenasenoughtopreventtheEarthheatingupbeyond2℃thiscentury－apointscientistssaywillbringthedangerofachangeableclimateinwhichweatherextremesarecommon,leadingtodrought,floods,cropfailuresandrisingsealevels.【语篇解读】　本文

8、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'reactiontoweathercouldhavedamagingeffectsonecosystems.B．Theincreasingspeedoffloweringisbeyondscientists'expect