英语听力教程3第二版unit1答案

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期刊文献年终总结年终报告工作总结个人总结述职报告实习报告单位总结演讲稿英语听力教程3第二版unit1答案　　小面是的英语听力教程3第二版unit1答案，希望对大家有所帮助!　　PartIGettingready　　B.Keys:　　1:burningoftheforests/treeremoval(deforestation)/reductionoftheworld'srainforests2:globalwarming/greenhouseeffect/emissionsofCO2　　PartIITheEarthatrisk(I)　　A.Keys:　　a.Morepeople--------morefirewood----fewertrees　　b.Moredomesticanimals------moreplants-----feweravailableplantsa,b--Moredesert----movesouth-----desrttexpandingsouth----no　　grass　　2.Growingcropsstabilizesoil,withoutthemthetopsoiljustblowsaway.Butifthereisn'tenoughrainthecropsdon'tgrow.　　3.Peopletrytogrowfoodtosupportthemselvesortocreaterancheswherecattlecanberaised,ortogethardwoodforexport,ortomakewayforanironoremine　　B.Keys:　　1:SaharaDesert　　2:NorthAmericamostofEurope　　3:topsoilblowingaway　　4:tropicalforestsdestruction　　5:animal/plantspeciesbecomingextinct　　6:climatechangeforthewholeworld　　PartIIITheEarthatrisk(II)　　A.Keys:　　1:Treeswouldholdrainfallintheirroots.Whenforestsinthehigherup-riverhavebeendestroyed,alltherainthatfallsinthemonsoonseasonflowsstraightintotheriverandstartstheflooding.　　2:Heimpliesthatsomenationalgovernmentsjustconsidertheresultsoftheirpoliciesinthenearfuture,orjustthinkasfaraheadasthenextelection.　　B.Keys:　　1:floodinginBangladesh　　2:Actiontobetaken　　3:populationcontrol　　Keys:　　1:Warmingupoftheworld　　2:Effectsofglobal　　3:reducedpotentialforfoodproduction　　4:changeofpatternsofhear-relatedfoodpoisoning,etc.　　PartVDoyouknow…?　　A.Keys:　　1:F2:F3:F4:F5:T　　B.Keys:　　Dos1:yourtowels2:Cutout3:awall-fire4:fridge5:waituntilyou'veafullload6:acompletemeal　　Don’ts7:ironeverything8:theironup9:thekettle10:tothebrim　　11:hotfood　　Tapescript　　PartIGettingready　　1.TheAmazonforestsaredisappearingbecauseofincreasedburningandtreeremoval.InSeptember,satellitepicturesshowedmorethan20000firesburningintheAmazon.Expertssaymostofthesefiresweresetbyfarmers.Thefarmerswereattemptingtoclearlandtogrowcrops.TheWorldWildlifeFundsaysanotherseriousproblemisthattoomanytreesintheAmazonrainforestarebeingcutdown.TheWorldWildlifeFundsaysthefiresshowtheneedforurgentinternationalactiontoprotecttheworld'srainforests.Thegroupwarnsthatwithoutsuchactionsomeforestscouldbelostforever.　　2.EnvironmentalissuesswelltothefullinBerlinthisweek,fortheUNspongsoredconferenceonglobalwarmingandclimatechangeisthefirstsuchmeetingsincetheRiosummitthreeyearsago.WithscientistsandgovernmentsnowgenerallyreadytoacceptthattheearthclimateisbeingaffectedbyemissionsofCO2andothergreenhousegases,overahundredcountriesaresendingdelegations.ButhowmuchprogresshasbeenmadeimplementingthegreenhousegasreductiontargetagreedonatRio?SimonDaryreports...　　B:That'sright.IntheUSA,asyouknow,intensiveagriculturerequiresaplentifulsupplyofrainforthesecropstogrow,Imeanifthereisn'tenoughrainthecropsdon'tgrow.Andgrowingcropsstabilizesoil,withoutthemthetopsoiljustblowsaway.Thisisalsotrueforanyregionthatisintenselyfarmed—mostofEurope,forexample.　　I:AndwhatdidyoufindinSouthAmerica?　　B:InSouthAmerica(asinCentralAfricaandSouthernAsia)tropicalforestsarebeingcutdownatanalarmingrate.ThisisdonesothatpeoplecansupportthemselvesbygrowingfoodortocreaterancheswherecattlecanberaisedtobeexportedtoEuropeorAmericaastinnedmeat.Theproblemisthatthesoilissopoorthatonlyacoupleofharvestsarepossiblebeforethisverythinsoilbecomesexhausted.Anditcan'tbefedwithfertilizerslikeagriculturallandinEurope.Forexample,inBrazilin1982anareaofjunglethesizeofBritainandFrancecombinedwasdestroyedtomakewayforanironoremine.HugenumbersoftreesarebeingcutdownforexportsashardwoodtoJapan,Europe,USAtomakethingslikeluxuryfurniture.Theseforestscan'tbereplaced—theforestsoilisthinandunproductiveandinjustafewyears,ajunglehasbecomeawasteland.Tropicalforestscontainrareplants(whichwecanuseformedicines,forexample)andanimals—oneanimalorplantspeciesbecomesextincteveryhalfhour.Theseforesttreesalsohaveworldwideeffects.Youknow,theyconvertcarbondioxideintooxygen.Theconsequenceofdestroyingforestsisnotonlythattheclimateofthatregionchanges(becausethereislessrainfall)butthischangeaffectsthewholeworld.Imean,overhalftheworld'srainforesthasbeencutdownthiscentury.　　PartIIITheEarthatrisk(II)　　I:So,Brian,wouldyouagreethatwhatwegenerallythinkofasnaturaldisastersareinfactman-made?　　B:Yes,byandlarge.Imean,obviouslynothurricanesorearthquakes,buttakeflooding,forexample.Practicallyeveryyear,thewholeofBangladeshisfloodedandthisisgettingworse.Youknow,thecauseisthatforestshavebeencutdownupinNepalandIndia,Imeanhigherup-riverintheHimalayas.Treeswouldholdrainfallintheirroots,butifthey'vebeencutdownalltherainthatfallsinthemonsoonseasonflowsstraightintotheriverGangesandfloodsthewholecountry.ThereasonforfloodinginSudanisthesame—theforestshigheruptheBlueNileinEthiopiahavebeendestroyedtoo.　　I:Well,thisallsoundsterriblydepressing.Um...Whatistobedone?Imean,cananythingbedone,infact?　　B:Yes,ofcourseitcan.First,thenationalgovernmentshavetobeforward-lookingandconsidertheresultsoftheirpoliciesintenortwentyyears,notjustthinkasfaraheadasthenextelection.Somehow,allthecountriesintheworldhavetoworktogetheronaninternationalbasis.Secondly,thepopulationhastobecontrolledinsomeway:therearetoomanypeopletryingtoliveofftoolittleland.Thirdly,wedon'tneedtropicalhardwoodtomakeourfurniture—it'saluxurypeopleintheWestmustdowithout.Softwoodsarejustasgood,lessexpensiveandcanbeproducedonenvironment-friendly"treefarms",wheretreesarereplacedatthesameratethattheyarecutdown.　　I:And,presumably,educationisimportantaswell.Peoplemustbeeducatedtorealizetheconsequencesoftheiractions?　　B:Yes,ofcourse.　　I:Well,thankyou,Brian　　I:So,Brian,wouldyouagreethatwhatwegenerallythinkofas...er...aser...naturaldisastersareinfactman-made?　　B:Yes,byandlarge...er...Imean,obviouslynothurricanesorearthquakes,buttakeflooding,forexample.Imean,practicallyeveryyear,thewholeofBangladeshisfloodedandthisisgettingworse.Youknow,thecauseisthatforestshavebeencutdownupinNepalandIndia...Imean...higherup-riverintheHimalayas.Trees...er...wouldholdrainfallintheirroots,butifthey'vebeencutdownalltherainthatfallsinthemonsoonseasonflowsstraightintotheriverGangesandfloodsthewholecountry.ThereasonforfloodinginSudanisthesame—theforestshigheruptheBlueNileinEthiopiahavebeendestroyedtoo.　　I:Well,thisallsoundsterriblydepressing.Um...whatistobedone?Imean,cananythingbedone,infact?　　B:Yes,ofcourseitcan...er...first,thenationalgovernmentshavetobeforward-lookingandconsidertheresultsoftheirpoliciesintenortwentyyears,notjustthinkasfaraheadasthenextelection.Somehow,allthecountriesintheworldhavetoworktogetheronaninternationalbasis.Secondly,thepopulationhastobecontrolledinsomeway:therearetoomanypeopletryingtoliveofftoolittleland.Thirdly,wedon'tneedtropicalhardwoodtomakeourfurniture—it'saluxurypeopleintheWestmustdowithout.Softwoodsarejustasgood,lessexpensiveandcanbeproducedonenvironment-friendly"treefarms",wheretreesarereplacedatthesameratethattheyarecutdown.　　I:And,presumably,educationisimportantaswell.Peoplemustbeeducatedtorealizetheconsequences...um...oftheiractions?　　B:Yes,yesofcourse.　　I:Well,thankyou,Brian.　　Theworldiswarmingup.Weknowthisbecauseaveragetemperaturesarethehighestsincescientistsstartedmeasuringthem600yearsago.Theincreaseisabout0.2℃everyyear.Thismayseemveryslight,butweknowthatslightchangesintemperaturecanhaveabigeffectonotherthings.Mostscientistsnowbelievethisglobalwarmingisduetohumanactivity.　　JeffJenkinsisheadofBritain'sClimatePredictionCenter.Heexplainshowglobalwarmingcanhappen.　　"Sunlightstrikestheearthandwarmsitup.Atthesametimeheatleavestheearth,butpartofthatistrappedbycarbondioxideandothergasesintheearth'satmosphere.Thathasbeenhappeningeversincetheearthwasformed.Butthefearisthatincreasingamountsofcarbondioxideproducedbyindustrialprocessesandtransportandsoonwillleadtoagreaterwarmingoftheearth'ssurface.Sothat'stheglobalwarmingthatpeopleareconcernedabout."　　Peoplearemostconcernedabouttheuseoffossilfuels.Fossilfuelsareoil,coal,woodandsoon.Whentheseburn,theyproducethegascarbondioxide.Manyscientistsagreethatanincreaseintheamountofcarbondioxideandsomeofthegasesintheatmospherewillincreasetheamountofwarming.Computersarebeingusedtopredictwhatthismaymean.Theyshowedthattherecouldbegreatchangesinrainfallandtheriseinthesealevelasicecapsinthenorthandsouthpolesmelt.ThiscouldhaveaseriouseffectonagricultureaccordingtoProf.MartinPerryofUniversityCollegeinLondon.Hesaysitcouldbecomemoredifficulttogrowfoodinthetropicsatlowerlatitudesnearertotheequator.　　"Theclearestpatternemergingisthepossibilityofreducedpotentialproductioninlowerlatituderegions,andmostgenerallyspeaking,increasedpotentialinhigherlatituderegions.Lowerlatituderegionsarealreadywarm,toputitextremelysimply,andplantstherearequiteneartheirlimitsofheatanddroughtstress.Anincreaseintemperatureorreductioninmoisturewouldplacelimitsoncropgrowth."　　Woman:Globalwarmingcouldreducefoodproductioninlowerlatituderegions.Lowerlatituderegionsarealreadywarm.Globalwarmingcouldputmorestressonplansandplacelimitsoncropgrowth.　　Foodproductionisonlyoneareathatcouldbeaffected.Therecouldalsobehealthandsocialproblems.Prof.AntonyMacMichaeloftheLondonSchoolofHygieneandTropicalMedicinebelievesthatsomeruralareasarealreadysuffering.Andtheinsectsandbacteriacouldspreaddiseasemoreeasily.　　"Alreadyanumberofruralpopulationsaroundtheworldaresufferingfromthedeclineofagriculturalsystems.Climatechangewouldaddtothis.Andwewouldexpectthatitwouldacceleratethefloodofenvironmentalrefugeesaroundtheworld.Butitincludesnotjustthefoodproductionsystems,butthepatternsofdistributionofinsectsandinfectiveagentsaroundtheworld.Itincludeslikelyeffectsonpatternsofheat-relatedfoodpoisoning,watercontaminationanddiarrheadiseases,lotsofthingslikethisthatwouldrespondsensitivelytochangesinclimate."　　Woman:Globalwarmingcouldaffectthedistributionofinsects.Globalwarmingcouldchangepatternsofheat-relatedfoodpoisoning.　　Manycountriesnowagreethatsomethingmustbedonetoreducethedangerofglobalwarming.Butaworldwideagreementonloweringtheproductionofcarbondioxidehasbeendifficulttoreach.Thisisbecausemanyeconomiesdependonfossilfuelslikeoil.Scientistsbelieveit'snowthepoliticiansineveryregionoftheworldwhoneedtotakeaction.　　PartVDoyouknow…?　　EnvironmenthastakenratherabackseatpoliticallysincetheEarthsummitinRiodeJaneironearly5yearsago.Buttheproblemsthatmeetinghighlightedhadnotgoneaway.Oneenvironmentalthinktank—theInternationalFoodPolicyResearchInstitute—hasbeenlookingatthefutureofwateranditsreportreflectsgrowingconcernatthehugeleapinusageoverthepastfewyears.　　Insomepartsoftheworld,waterconsumptionhasincreasedfivefold.Andtheinstitute,knownbyitsinitialsIFPRI,saysshortagescouldsoonbecomethetriggerforconflictandamajorbarriertofeedingtheworld'sgrowingpopulation.Here'sRichardBlackofourScienceUnit.　　"It'softenbeensaidthatwaterratherthanoilwillbethecauseofwarfareinthenextcentury.AccordingtotheIFPRIreport,thetimewhenthathappensmightnotbefaraway.Thenumberofpeopleaffectedbywatershortagewillincreasetenfoldoverthenext30years,itsays,whichcouldwellleadtolargescaleconflicts.　　Themainreasonwhywaterisbecomingascarceresourceisagriculture,whichnowaccountsfor70%ofwaterconsumptionworldwide,90%insomedevelopingcountries.Countlessfarmershaveswitchedfromgrowingindigenouscropsforthehomemarkettohighyieldexportvarieties,whichinevitablyneedfarmorewater.ButtheIFPRIreportsaysthatinsomeregionswatershortageisnowthesinglebiggestimpedimenttofeedingthepopulation.Waterscarcityalsoleadstowaterpollution.IntheIndianStateofWestBengal,forexample,overextractionofwaterfromboreholeshasledtoarsenicpoisoningwhichisestimatedtohaveaffectedtwomillionpeoplesofar.ButtheIFPRIreportcallsforbetterwatermanagementworldwideincludingfinancialincentivestoencourageconservation."　　ThatreportbyRichardBlackofourScienceUnit.　　PartIITheEarthatrisk(I)　　I(Interviewer):BrianCowlesistheproducerofanewseriesofdocumentariescalled"TheEarthatRisk"whichcanbeseenonChannel4laterthismonth.Eachprogramdealswithadifferentcontinent,doesn'tit,Brian?　　B(BrianCowles):That'sright.WewenttoAmerica,bothNorthandSouthandthenwewentovertoAfricaandSouth-EastAsia.　　I:Andwhatdidyoufindineachofthesecontinents?　　B:StartingwithAfrica,ourfilmshowstheimpactofthepopulationontheenvironment.Generallyspeaking,thishascausedtheSaharaDeserttoexpand.It'sabitofaviciouscirclewefind.Peoplecutdowntreesforfirewoodandtheirdomesticanimalseatalltheavailableplants—andsoconsequentlytheyhavetomovesouthastheSaharaDesertexpandsfurthersouth.Imean,soonthewholeofMaliwillbecomeadesert.AndinEastAfrica:herethegrasslandsaresupportingtoomanyanimalsandtheresultis,ofcourse,there'snograss—nothingfortheanimalstoeat.　　I:Isee.AndthenextfilmdealswithNorthAmerica?阅读相关文档:英语听力入门3000第一册答案小学生英语听力培养训练方法2017英语专四听力5篇2017小学英语听力CatchoftheDay习 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