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高考英语阅读理解试题及答案高考英语阅读理解试题及答案Polar-icemeltdownSomescientistswarnthaticeneartheEarth’sPolesmayindeedbemelting.This“polarmeltdown”maybethefirstsignthattheEarthisheatingup.Wecouldbeinveryserioustroubleifthistrendcontinues.Itisestimatedthatameltdownofaslittleas10percentofAntarctica’sicewouldraisesealevelsaroundtheglobeby4to9meters.Floodswouldcoverlow-lyingregionsandturncoastalcitieslikeNewYorkandNewOrleansintoreallifeunderwaterworld.Scientistsfirstpredictedinthe1970sthatheattrappedintheEarth’satmospherecouldcauseapolarmeltdown.Manynowbelievethathumanactivitiesareturninguptheheat.Whenweburnfossilfuelslikecoalandoil,weaddcarbondioxide(CO2)gastotheEarth’satmosphere.CuttingdowntreesalsomakesCO2levelsraisebecausetreesnormallysoakupCO2tomakefood.ScientistssayhigherCO2levelsstrengthenthe“greenhouseeffect”andcouldincreasetheEarth’stemperature.Infact,CO2levelshaverisenby30percentsincetheIndustrialRevolutionofthe18thand19thcenturies.Overthepastthreeyears,satellitemeasurementshaveshownasealevelriseofaboutaquarterinchworldwide.“Ifnothingisdonetoreducefossil-fuelpollutionandglobalwarming,sealevelswillriseevenmore.”saysgeologistRichardAlley.ButevenAlleyadmitsthatapolarmeltdownwouldtaketime.TheiceinAntarcticaandArcticlocksupnearlyninetimesthevolumeofwatercontainedinalltheworld’sriversandlakes.Thesearesuchbig“icecubes”anditwouldprobablytakethousandsofyearstomeltthem.AnotherscientistCharlesBentleydoesn’tthinkameltdownwillhappenatall.“Evenifwarmertemperaturesbegintomeltpolar-ice,”hesays,“theexcessmoisturewouldmostlikelyberedepositassnow.”Inotherwords,themeltedicewouldevaporateintotheatmosphere,refreeze,andfallasrainandsnowoverthePoles.1.Whatconsequenceofglobalwarmingismentionedinthe-font-weigpassage?A.Moretropicalstorms.B.Moretropicaldiseases.C.Changesinfarmproductivity.D.Coastalflooding.2.Whichofthefollowingstatementsdoesthesecondparagraphsupport?A.CO2intheatmospherecannotkeeptheheatfromescapingintospace.B.TheincreaseofCO2gasmaywarmtheplanetandhelptomeltpolarice.C.Cuttingdowntreeshelpsto
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