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1、2014高考英语阅读理解巩固练习(42)及答案TheholeintheEarth’sozonelayer(臭氧层)hasuntilnowprotectedAntarcticafromtheworsteffectsofglobalwarming.Butscientistshavewarnedthatastheholeclosesupinthenextfewdecades,temperaturesonthecontinentcouldrisebyaround3℃onaverage,withmeltingicecontributingtoaglobalse
2、alevelincreaseofupto1.4metres.InthepastdecadesthewesternAntarctichasseenrapidicelossastheworldhaswarmed,buttheotherpartsofthecontinenthave,paradoxically,beencooling,resultingina10%increaseiniceintheseasaroundtheregion.ThisisbecausetheholeintheozonelayerhasincreasedcoldwindsinAn
3、tarctica,makingmuchofthecontinentsurfacecolderthanusual.Butnowthatthegassesthatcausetheozoneholehavebeenbanned,scientistsexpecttheholetorepairitselfwithinthenext50to60years.BythenthecoolingeffectwillhavefadedoutandtheAntarcticwillfacethefullimpactofglobalwarming.Thismeansanincr
4、easeinaverageairtemperaturesofaround3℃andareductioninseaicebyaroundathird.Thebiggestthreattothecontinentcomesfromwarmingseas.RobertJohnson,ascientistwhomonitorsAntarcticaicesheets,said,“TheicesheetsinAntarcticaarehundredsofmetresthick.Butoncewarmoceanwatersstartflowingunderneat
5、h,theicewillbeginthinningandcouldbreakupveryquickly.”Thinningicesheetscauseicetobreakawayfromthecontinentandtomeltevenfaster.EscapingicefromwesternAntarcticahasalreadyresultedina10%riseinglobalsealevelinrecentdecades.Johnsonbelievesthatinternationalactiontoreduceglobalwarmingis
6、requiredimmediatelyoritmaybetoolate.“Everythingisconnected—AntarcticamaybealongwayawaybutitisanimportantpartoftheEarth’ssystem,”saidJohnson.“Itcontains90%oftheworld’sice,70%oftheworld’sfreshwaterandthatisenough,ifitmeltscompletely,toraisesealevelsby63metres.”-9-Eveninaworse-cas
7、esituationscientistsdon’texpecttheicetoentirelydisappear,butpredictthat,becauseofthemeltingicesheets,averagesealevelrisewillbearound1.4metreshigherbytheendofthecentury.1.Theunderlinedword“paradoxically”(inParagraph2)mostprobablymeans“________.”A.rapidlyB.approximatelyC.contradi
8、ctorilyD.apparently【最佳选项】 C2.Whatistheeffectoftheholei