大学英语听力教程第三册答案主编张民伦.docx

大学英语听力教程第三册答案主编张民伦.docx

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大学英语听力教程第三册答案主编张民伦

《英语听力教程3》答案与听力材料

呵呵....考试一路顺风......

UNIT1

A.

B.Keys:

PartIGettingready

1:

burningoftheforests/treeremoval（deforestation）/reductionoftheworld'srainforests

2:

globalwarming/greenhouseeffect/emissionsofCO2

PartIITheEarthatrisk（I）

A.Keys:

1.

a.Morepeople--------?

morefirewood----?

fewertrees

b.Moredomesticanimals------?

moreplants-----?

feweravailableplants

a,b--?

Moredesert----?

movesouth-----?

desrttexpandingsouth----?

nograss

2.Growingcropsstabilizesoil,withoutthemthetopsoiljustblowsaway.Butifthereisn'tenoughrainthecropsdon'tgrow.

3.Peopletrytogrowfoodtosupportthemselvesortocreaterancheswherecattlecanberaised,ortogethardwoodforexport,ortomakewayforanironoremine

B.Keys:

1:

SaharaDesert

2:

NorthAmerica&mostofEurope

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

PartIVMoreaboutthetopic:

TheEffectsofGlobalWarming

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'veafullload

6:

acompletemeal

Don’ts7:

ironeverything8:

theironup9:

thekettle10:

tothebrim

11:

hotfood

Unit2

PartIGettingready

A.

B.Keys:

1:

InternationalUnionfortheConservationofNature,

UnitedNations,wildlife,policies

2:

ConventiononInternationalTradeinEndangeredSpecies,

trade,animalsandplants,1975,prohibits,8000,controls,

30000

3:

UnitedNationsEnvironmentalProgram,

leadership,environment,qualityoflife

4:

WorldWideFundforNature（formerlyWorldWildlifeFund）,

1961,SaharaDesert,NorthAmerica&mostofEurope,

topsoilblowingaway

C.Keys:

1:

22:

43:

54:

1,65:

3

Questions:

1:

Theyworktoconservenaturalareasthatcontainendangeredwildlife

2:

Theyarecampaigningtoprovideseasanctuariesforsomeoftheseendangeredspecies.Protected-nestingsitesforturtleshavebeensetup

3:

Itreferstotheplacesofsafetyintheseawhereseaanimalsareprotectedandallowedtolivefreely

PartIIChristmasbirdcounts

A.Keys:

1:

Jan.3rd2:

morethan40000volunteers3:

16004:

a15milediameter

5:

anAmericanartist6:

theirnaturalhabitats7:

thelate1800s

B.Keys:

1:

start2:

sponsored3:

outsidecountingbirds4:

experiencedbirdwatchers

5:

anyonethatisinterestedorconcerned6:

scheduled7:

10peopletakingpart

8:

15milediametercircle9:

thetotalbirdpopulations10:

thenumberofbirds

11:

thelongest-runningbirdcensus12:

undefined

PartIIIDolphincaptivity

A.

B.Keys:

1:

12:

33:

44:

55:

2

6:

Dolphinsshouldbekeptincaptivity.

7:

Thereareeducationalbenefitsofkeepingmarinemammalsincaptivity.

C.Keys:

1:

stress（family-oriented）2:

sonarbouncingoff

3:

averageageofdeath;lifegettingbetterforcaptivedolphins

4:

naturalbehabiorpatterns-altered

5:

sufferingfromfracturedskulls,ribsorjaws

6:

can'tlearnfromanimalsinthewildhowtheyoperate,breed,whattheyneed,etc.

PartIVMoreaboutthetopic:

Birds----ASourceofWealth

Keys:

1：

93002：

Habitat3：

warmerclimates4：

300differentspecies

5：

colderclimates6：

habitatalteration7：

estheticvalue8：

Birds'population

PartVDoyouknow…?

Keys:

1:

oneandone-halfmillion2:

20times

3:

1004:

400005:

65million

6:

35007:

2millionsquaremiles8:

3%

9:

200animalspecies10:

1000

11:

athird12:

two-thirds13:

three-quarters

Unit3ElNino?

LaNina?

PartI

D.warmer/greenhouseeffect/sealevels/climatezones

As1998endsandpeoplelookforwardtothelastyearofthecentury,theWorldAlmanacspokewithexpertsaboutwhatcomesnext.Almanaceditorialdirectorsaystheexpertsbelievethenextcenturywillbringlotsofchanges.

Warm,ofcourse,thatourclimateisgoingtocontinuegettingwarmer.That’sthesubject,bytheway,ofanothernewarticleonthe1999WorldAlmanac.Thegreenhouseeffect,exactlywhatcausesit,andwhatstepstobetakento,perhapstoalleviateglobalwarmings.I’veseenrecentlythat1998isgoingtogodownasthewarmestyeareveronrecord.Andsothat’sgoingtobea