山西省山阴县2017高考英语一轮阅读理解课外训练题三

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1、山西省山阴县2017高考英语阅读理解一轮课外训练题三阅读下列短文，从每题所给的四个选项（A、B、C、D）中，选出最佳选项。【2016高考训练】uPlanlswereexpectedtogetlargerwithincreasedcarbondioxideintheatmosphere,butchangesintemperature,humidityandnutrientavailabilityseemtohavetrumpedthebenefitsofincreasedcarbondioxide

2、,”saidresearchersfromtheNationalUniversityofSingapore.45percentofthespeciesstudiednowreachsmalleradultsizesthantheydidinthepast.Theresearcherspointedoutthatwarmertemperaturesandchanginghabitats,causedbyclimatechange,arepossiblereasonsforshrinkingcrea

3、tures.“Wedonotyetknowthemechanismsinvolved,orwhysomeorganismaregettingsmallerwhi1eothersareunaffected,”theresearcherssaid."Untilweunderstandmore,wecouldberiskingnegativeconsequencesthatwecan'tyetquantify.”Thechangewasbigincold-bloodedanimals-Onlytwod

4、ecadesofwarmertemperatureswereenoughtomakereptiles（爬行动物）smaller.Anincreaseof1degreecentigradecausednearlya10percentincreaseinmetabolism（新陈彳弋谢）•Greateruseofenergyresultedintinytortoisesand1ittle1izards.Fisharesmal1ernowtoo.Thoughoverfishinghasplayedap

5、artinreducingnumbers,experimentsshowthatwarmertemperaturesalsostopfishgrowth.Thereisarecentreportonwarmertemporatures，negativeeffectsonplankton（浮游牛物），thebaseofthemarineecosystem.Warm-bloodedanimalsweren"timmunefromthesizechangecausedbyclimatechange.M

6、anybirdsarenowsmaller.Mammalshavebeenminiaturizedtoo.Soaysheeparethinner.Reddeerareweaker.Andpolarbearsaresmal1er,comparedwithhistoricalrecords.ThisisnotthefirsttimethishashappenedinEarth"shistory.55millionyearsago,awarmingeventsimilartothecurrentcli

7、matechangecausedbees,spidersandantstoshrinkby50to75percentoverseveralthousandyears.ThateventhappenedoveralongtimethanthecurrentclimatechaThespeedofmodemclimatechangecouldmeanorganismsmaynotrespondoradaptquicklyenough,especiallythosewithlonggeneration

8、times.So,itislikelythatmorenegativeinfluencesofclimatechangewillbeshowninfuture.1・Whichofthefollowingwouldbethebesttitleforthepassage?A.Whydosomespeciesbecomesmaller?B.HowdoestemperaturechangeinEarth，shistory?C.Climatechangehasmanynegativeeffects.D.S