英语高级视听说 答案 unit 5 global warning

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1、Audio-VisualClassesUnit:5GlobalWarningBackgroundNotes1-GlobalWarmingItmeansthetemperatureoftheEarthisgettinghigherthantheaverage.Inotherwords,theplanetincluding;atmosphere,oceansandlandmasses,iswarming,andthemainreasonforthiswarmingistheburningofthefossilfuels.2-Gr

2、eenhouseGasGreenhousegasesarecomponentsoftheatmospheresuchas;watervapor(H2O),carbondioxide(CO2),methane(CH4),andozone(O3).Somegreenhousegasesoccurnaturallyintheatmosphere,whileothersresultfromhumanactivities.Certainhumanactivitiesincreasesomeofthesegasesintotheatmo

3、spherespeciallyCO,CO2(carbonmonoxide,carbondioxide).3-GreenlandAnislandofDenmarklocatedinthenorthoftheAtlanticoceanandnorthwestofCanada.Itisthelargestislandintheworld,thetotalareaofGreenlandisabout2.17millionsquarekilometersand1.8ofitisicecap.4-CanaryintheMineCoalm

4、inersusedtotakecanarybirdsintotheminesasadecoy(asignforcomingdangers).Ifthecanarydied,thentheminersrealizedthattheywereinaregionofdangerandtheymightalsodieofthepoisonousgasesundertheground.5-NorthpoleTheNorthPoleisabout(725km)northofGreenlandinthemiddleoftheArcticO

5、cean-theseatherehasadepthof(4087meters).Mostofthetime,theseaicecoverstheNorthPolebutrecently,waterhasbeensightedattheexactlocationofthepole.Ifyou'restandingattheNorthPole,allpointsaresouthofyou(eastandwesthavenobearing).TheNorthPoleexperiencessixmonthsofdaylightand

6、sixmonthsofdarkness.NorthPolePenguinsPolarBearsPre-listeningQuestionsDiscussthefollowingquestions;1-WhatwouldhappenifthetemperatureoftheEarthwouldbeincreasinginthenext10years?2-arethereanysignsoftemperaturechangesyouhavenoticedinthelastfewyears?3-doyouthinkGlobalWa

7、rmingisarealthreadtoourplanet?Whatdoyousuggesttosavetheworldifthereisadanger?WhileListeningTASK11-D-theroleofhumansinglobalworming2-A-itcanbestoppedifwecanactnow3-A-provideconclusiveevidencethathumansshouldbeheldaccountable4-B-Extinctionofallarcticspecies5-D-Polarb

8、ears6-C-isnotreadytotackle7-B-concernedTASK2Episode11-[F]2-[T]3-[T]4-[T]5-[T]6-[F]Episode21-naturallychangingclimate2-man’sdoing3-expeditions4-ic