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时间:2020-04-03
《【课堂新坐标】2013届高三英语一轮复习 2课时知能训练 新人教版选修8(广东专用).doc》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、课时知能训练Ⅰ.阅读理解(2012·广东潮州月考)TheholeintheEarth'sozonelayer(臭氧层)hasuntilnowprotectedAntarcticafromtheworsteffectsofglobalwarming.Butscientistshavewarnedthatastheholeclosesupinthenextfewdecades,temperaturesonthecontinentcouldrisebyaround3℃onaverage,withmeltingicec
2、ontributingtoaglobalsealevelincreaseofupto1.4metres.InthepastdecadesthewesternAntarctichasseenrapidicelossastheworldhaswarmed,buttheotherpartsofthecontinenthave,paradoxically,beencooling,resultingina10%increaseiniceintheseasaroundtheregion.Thisisbecausetheho
3、leintheozonelayerhasincreasedcoldwindsinAntarctica,makingmuchofthecontinentsurfacecolderthanusual.Butnowthatthegassesthatcausetheozoneholehavebeenbanned,scientistsexpecttheholetorepairitselfwithinthenext50to60years.Bythenthecoolingeffectwillhavefadedoutandth
4、eAntarcticwillfacethefullimpactofglobalwarming.Thismeansanincreaseinaverageairtemperaturesofaround3℃andareductioninseaicebyaroundathird.Thebiggestthreattothecontinentcomesfromwarmingseas.RobertJohnson,ascientistwhomonitorsAntarcticaicesheets,said,“Theiceshee
5、tsinAntarcticaarehundredsofmetresthick.Butoncewarmoceanwatersstartflowingunderneath,theicewillbeginthinningandcouldbreakupveryquickly.”Thinningicesheetscauseicetobreakawayfromthecontinentandtomeltevenfaster.EscapingicefromwesternAntarcticahasalreadyresultedi
6、na10%riseinglobalsealevelinrecentdecades.Johnsonbelievesthatinternationalactiontoreduceglobalwarmingisrequiredimmediatelyoritmaybetoolate.“Everythingisconnected—AntarcticamaybealongwayawaybutitisanimportantpartoftheEarth'ssystem,”saidJohnson.“Itcontains90%of
7、theworld'sice,70%oftheworld'sfreshwaterandthatisenough,ifitmeltscompletely,toraisesealevelsby63metres.”Eveninaworsecasesituationscientistsdon'texpecttheicetoentirelydisappear,butpredictthat,becauseofthemeltingicesheets,averagesealevelrisewillbearound1.4metre
8、shigherbytheendofthecentury.【语篇解读】 本文主要描述了由于臭氧层的破坏,南极洲冰层正处于加速融化的危险中。科学家认为南极冰层不会完全消失,但海平面会随着冰层的融化而上升。1.Theunderlinedword“paradoxically”(inParagraph2)mostprobablymeans“________”.A.rapidly B.a
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