湖北省黄石市2014高考英语 阅读理解训练题（12）.doc

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1、湖北省黄石市2014高考英语阅读理解训练题（12）及答案“Theworld'soceansareslowlygettingmoreacidic(酸的),”sayscientists.TheresearchersfromCaliforniareportthatthechangeistakingplaceinresponsetohigherlevelsofcarbondioxideintheatmosphere.Theloweringofthewaters'PHvalueisnotgreatatthemomentbutc

2、ouldcauseaseriousthreattocurrentoceanlifeifitcontinues,theywarn.KenCaldeiraandMichaelWickett,fromtheLawrenceLivermoreNationalLaboratory,reporttheirconcernsinthejournalNature.Increasinguseofoilfuelsmeansmorecarbondioxideisgoingintotheair,andmostofitwilleventuall

3、ybeabsorbedbyseawater.Onceinthewater,itreactstoformcarbonicacid.Scientistsbelievethattheoceanshavealreadybecomeslightlymoreacidicoverthelastcentury.Theseresearchershavetriedtopredictwhatwillhappeninthefuturebycombiningwhatweknowaboutthehistoryoftheoceanswithcom

4、putermodelsofclimatechange.“ThislevelofaciditywillgetmuchmoreextremeinthefutureifwecontinuereleasingCO2intotheatmosphere,”saidDrCaldeira.Andwepredicttheamountoffutureaciditywillbegreaterthananythingwehaveseenoverthelastseveralhundredmillionyears.However,itisnot

5、absolutelyclearwhatthatmeansforoceanlife.Mostorganismslivenearthesurface,wherethegreatestPHchangewouldbeexpectedtooccur,butdeep－oceanlifeformsmaybemoresensitivetoPHchanges.Coralreefsandotherorganismswhoseshellscontaincalciumcarbonate(碳酸钙)maybeparticularlyaffect

6、edifthewater'saciditylevelskeepgoingup,theteampredict.TheycouldfinditmuchmoredifficulttobuildthesestructuresinwaterwithalowerPH.Inrecentyearssomepeoplehavesuggestedstoringcarbondioxidefrompowerstationinthedeepoceanasawayofdealingwithglobalwarming.ButDrCaldeiras

7、aidthatsuchastrategyshouldnowbere—considered.“Previously,mostexpertshadlookedatoceanabsorptionofcarbondioxideasagoodthing——becauseinreleasingCO2intotheatmospherewewarmtheplanet,andwhenCO2isabsorbedby-9-theocean,itreducestheamountofgreenhousewarming.”17.Theocean

8、isbecomingmoreacidicdueto___________.A.thelowerwaterPHvalueB.thewarmingatmosphereC.thehigherlevelofCO2intheairD.theincreasinguseofoilfuels18.AccordingtoDrCaldeira,__________