【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

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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