《英語聽力教程3》聽力原文與答案

1、1《英語聽力教程《英語聽力教程3》答案與聽力材料》答案與聽力材料UNIT1PartIGettingreadyA.B.Keys:1:burningofthefeststreeremoval(defestation)reductionofthewldsrainfests2:globalwarminggreenhouseeffectemissionsofCO2PartIITheEarthatrisk(I)A.Keys:1.a.Mepeople

2、?mefirewood?fewertreesb.Medomesticanimals?meplants?feweravailableplantsab?Medesert?movesouth?desrttexpingsouth?nograss2.Growingcropsstabilizesoilwithoutthemthetopsoiljustblowsaway.Butifthereisntenoughrainthecropsdontgrow

3、.3.PeopletrytogrowfoodtosupptthemselvestocreaterancheswherecattlecanberaisedtogethardwoodfexpttomakewayfanironemineB.Keys:1:SaharaDesert2:NthAmerica&mostofEurope3:topsoilblowingaway4:tropicalfestsdestruction5:animalplant

4、speciesbecomingextinct6:climatechangefthewholewldPartIIITheEarthatrisk(II)A.Keys:1:Treeswouldholdrainfallintheirroots.Whenfestsinthehigherupriverhavebeendestroyedalltherainthatfallsinthemonsoonseasonflowsstraightintother

5、iverstartstheflooding.2:Heimpliesthatsomenationalgovernmentsjustconsidertheresultsoftheirpoliciesinthenearfuturejustthinkasfaraheadasthenextelection.B.Keys:1:floodinginBangladesh2:Actiontobetaken3:populationcontrolPartIV

6、Meaboutthetopic:TheEffectsofGlobalWarmingKeys:3bitofaviciouscirclewefind.Peoplecutdowntreesffirewoodtheirdomesticanimalseatalltheavailableplants—soconsequentlytheyhavetomovesouthastheSaharaDesertexpsfurthersouth.Imeansoo

7、nthewholeofMaliwillbecomeadesert.inEastAfrica:herethegrasslsaresupptingtoomanyanimalstheresultisofcoursetheresnograss—nothingftheanimalstoeat.I:Isee.thenextfilmdealswithNthAmericaB:Thatsright.IntheUSAasyouknowintensiveag

8、riculturerequiresaplentifulsupplyofrainfthesecropstogrowImeanifthereisntenoughrainthecropsdontgrow.growingcropsstabilizesoilwithoutthemthetopsoiljustblowsaway.Thisisalsotruefanyregionthatisintenselyfarmed—mostofEuropefex

9、ample.I:whatdidyoufindinSouthAmericaB:InSouthAmerica(asinCentralAfricaSouthernAsia)tropicalfestsarebeingcutdownatanalarmingrate.Thisisdonesothatpeoplecansupptthemselvesbygrowingfoodtocreaterancheswherecattlecanberaisedto

10、beexptedtoEuropeAmericaastinnedmeat.Theproblemisthatthesoilissopothatonlyacoupleofharvestsarepossiblebefethisverythinsoilbecomesexhausted.itcantbefedwithfertilizerslikeagriculturallinEurope.FexampleinBrazilin1982anareaof

11、junglethesizeofBritainFrancecombinedwasdestroyedtomakewayfanironemine.HugenumbersoftreesarebeingcutdownfexptsashardwoodtoJapanEuropeUSAtomakethingslikeluxuryfurniture.Thesefestscantbereplaced—thefestsoilisthinunproductiv

12、einjustafewyearsajunglehasbecomeawastel.Tropicalfestscontainrareplants(whichwecanusefmedicinesfexample)animals—oneanimalplantspeciesbecomesextincteveryhalfhour.Thesefesttreesalsohavewldwideeffects.Youknowtheyconvertcarbo

13、ndioxideintooxygen.Theconsequenceofdestroyingfestsisnotonlythattheclimateofthatregionchanges(becausethereislessrainfall)butthischangeaffectsthewholewld.Imeanoverhalfthewldsrainfesthasbeencutdownthiscentury.PartIIITheEart

14、hatrisk(II)A.I:SoBrianwouldyouagreethatwhatwegenerallythinkofasnaturaldisastersareinfactmanmadeB:Yesbylarge.Imeanobviouslynothurricanesearthquakesbuttakefloodingfexample.PracticallyeveryyearthewholeofBangladeshisfloodedt

15、hisisgettingwse.YouknowthecauseisthatfestshavebeencutdownupinNepalIndiaImeanhigherupriverintheHimalayas.Treeswouldholdrainfallintheirrootsbutiftheyvebeencutdownalltherainthatfallsinthemonsoonseasonflowssraightintotherive