Unit5综英课后练习参考答案

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1、应出版社要求，只做内部交流，请大家不要上传互联网，谢谢!Unit5PartIListeningTaskScriptfortherecording:IntheNorwegianArctic,researchersimmobilizepolarbearswithdrugsandthenfitthemwithradiocollarssotheycanbetrackedbysatellite,tomonitorhowglobalwarmingistakingaserioustollonpolarbears.Accor

2、dingtoexperts,arcticseaicehasbeenshrinkingbythreepercenteachdecadesincethe1970s,andthatshortenstheseasonwhenpolarbearscanhuntseals.Polarbearsareanimportantindicatortogetanunderstandingofwhat'shappeningintheArctic.Therearealotofotherspeciesthatwillbeaffected

3、byclimatechangeand/orpollution,butwhenyoulookatit,polarbearsaremucheasiertostudyinalotofrespectsandwecancatchthesameindividualsoveralongperiodoftime.Wecanfollowthemformanyyearsandgetgoodinsightsintowhatishappening.Theimpactofclimatechangeonpolarbearsundersc

4、oresthecriticalneedtoreducecarbonpollution,whichiswidelyblamedforglobalwarming.Expertsnowsayifclimatekeepsgettinghotter,in100yearsbytheendofeachsummer,therewillbenoiceatallintheArcticOcean.Inviewoftheworseningclimaticsituation,nationshavesignedandratifiedth

5、eKyotoProtocolonClimateChange.TheKyotoclimatetreatyrequiresallnationstoreducetheircarbonemissionssothatthenegativeimpactofclimatechangecanbehalted.Itistheonlyglobalefforttofightclimatechange,anditisagoodstepforwardintherightdirection.AfterListening1.howglob

6、alwarmingistakingaserioustoll2.reducecarbonpollution3.noiceatallintheArcticOcean4.fightclimatechangePartIIReadingtaskTextAComprehensionPossibleanswerstocontentquestions:1.Globalwarming.1.Shediscovereditwasmeltingintotheocean.2.Thecomplexmeteorologicalproces

7、sesassociatedwithsnow,permafrostandicemagnifytheeffectsofglobalwarminginthepolarregions.3.Itpointstothefactthathumanityhasalteredtheclimate.4.Theymeanthattheweatherissochangeablethatthereisnosuchthingasnormalweather.5.Itisalong-termshiftinworldwidetemperatu

8、re.6.Worldwidetemperaturesclimbedmorethan1°Foverthepastcentury.Snowfieldsaredisappearingfrommountaintopsaroundtheglobe.Coralreefsaredyingoff.DroughtisthenorminpartsofAsiaandAfrica.ElNinoeventsaremorefr