英语听力教程第三版答案.docx

英语听力教程第三版答案.docx

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英语听力教程第三版答案

英语听力教程第三版答案

【篇一：

《英语听力教程3》第二版_unit2_答案】

ass=txt>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,northamericamostofeurope,

topsoilblowingaway

c.keys:

1:

22:

43:

54:

1,65:

3

questions:

1:

theyworktoconservenaturalareasthatcontainendangeredwildlife

2:

theyarecampaigningtoprovideseasanctuariesforsomeoftheseendangeredspecies.protected-nestingsitesforturtleshavebeensetup3:

itreferstotheplacesofsafetyintheseawhereseaanimalsareprotectedandallowedtolivefreely

partiichristmasbirdcounts

a.keys:

1:

jan.3rd2:

morethan40000volunteers3:

16004:

a15milediameter5:

anamericanartist6:

theirnaturalhabitats7:

thelate1800s

b.keys:

1:

start2:

sponsored3:

outsidecountingbirds4:

experiencedbirdwatchers5:

anyonethatisinterestedorconcerned6:

scheduled7:

10peopletakingpart8:

15milediametercircle9:

thetotalbirdpopulations10:

thenumberofbirds11:

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:

cantlearnfromanimalsinthewildhowtheyoperate,breed,whattheyneed,

etc.keys:

1：

93002：

habitat3：

warmerclimates4：

300differentspecies

5：

colderclimates6：

habitatalteration7：

estheticvalue8：

birdspopulation

partvdoyouknow…?

keys:

1:

oneandone-halfmillion2:

20times

3:

1004:

400005:

65million

6:

35007:

2millionsquaremiles8:

3%

9:

200animalspecies10:

1000

11:

athird12:

two-thirds13:

three-quarters

tapescript

partigettingready

a:

hello,imcallingonbehalfoftheworldwildlifefund.

b:

thewhat?

a:

theworldwildlifefund.ifyouvegotafewminutesidliketotellyouwhatthatmeans.

b:

oh,allright.

a:

weworktoconservenaturalareasthatcontainendangeredwildlife.theseas,forexample,havebecomepollutedbytheindustrializedworld;whalesarebeinghuntedtoextinction;turtlesarerolledofftheireggswhentheycomeashoretobreedorareslaughteredfortheirmeatandoil…

b:

oh.

a:

crocodilesarekilledtomakehandbagsandshoes;walrusesarehuntedfortheirivory.

b:

isee.

a:

sealsarebludgeonedtodeathtoprovidefurcoatsandthethreatofextinctionhangsoverseveralspeciesofwhale,dolphinandporpoise.b:

really.

a:

wearenowcampaigningtoprovideseasanctuariesforsomeoftheseendangeredspecies.

b:

veryinteresting.

a:

aidedbyourcampaign,protectednestingsitesforturtleshavealreadybeensetup.asyoucansee,thisisveryvaluableworkandiwonderthereforeifyoudliketomakeadonation?

partiichristmasbirdcounts

johnjamesaudubonwasanamericanartistintheearly1800s,whoillustratedbirdsintheirnaturalhabitats.thesocietynamedafterhimwasfoundedinthelate1800sbyconservationistsconcernedwiththedeclineofbirds,whichwerebeingkilledsotheirfeatherscouldbeusedinthemanufactureofwomenshats.

sponsoredbythenationalaudubonsociety,morethan40000volunteerswillbeoutsidecountingbirdsfromtodayuntiljanuary3rd.volunteersfromall50statesoftheunitedstates,everycanadianprovince,partsofcentralandsouthamerica,bermuda,thewestindiesandpacificislandshavebeguntocountandrecordeveryindividualbirdandbirdspeciesobservedduringthetwoandonehalfweekperiodofthecount.

jeffreylebaronisthenationalaudubonsocietyschristmasbirdcounteditor.hesaysthecountisthelongest-runningbirdcensusinornithology.

thisyear,accordingtomr.lebaron,morethan1600separatebirdcountshavebeenscheduled.somewouldhaveasfewas10peopletakingpart,otherswithhundreds.thelogisticsofthechristmasbirdcount,headds,aresimple.

eachindividualcountisinacircle.itsa15milediametercircle,um,aroundtheexactcenterpoint.anditsalwaystheexactlysameareathatsdoneeveryyear,usually,evenonthesameweekendduringthecountperiod.andwhattheidealwouldbe,whichisvirtuallyimpossible,isthiscensus:

everysingleindividualbirdwithinthatcircleonthecountday.

mr.lebaronsaysexperiencedbirdcounterscangetagoodideaofthetotalbirdpopulationswithinthecountcirclebasedonthenumberofbirdstheyactuallysee.theeditorpointsout,however,thatthecountsarenotonlyforexperiencedbirdwatchers.

anybodythatisinterestedorconcernedcanbecomeinvolved.beginnerswillgooutinapartywithexperiencedindividualswhoknowboththeareaandthebirdsinthearea,inthefieldwheremoreeyesandearsarebetter.andthenanybodycanpointoutabird,andsomeoneinthefieldwillalwaysbeabletoidentifythebird.

partiiidolphincaptivity

a:

aplannedaquaticparkindenverisraisingtheireofanimalrightsactivistswhoobjecttoaproposaltoincludeacaptivedolphindisplay.althoughofficialsforcoloradosoceanjourneyssaytheyhaveyettomakeafinaldecisionontheissue,localandnationalactivistshavealreadyinstigatedanodolphinsindenvercampaign.ascoloradopublicradiospeterjonesreports,thebattlelineshavebeenclearlydrawn.

p:

ricktroud,aformernavydolphintrainerbasedinflorida,istakinganactiveroleinthenodolphinscampaign.

r:

averageageinthewildrangesanywhereinsomeofthestudiesbetween30and40yearsofage.incaptivity,youcanexpectadolphintolivemaybe5.13years,andevery7yearsincaptivity,thedolphinpopulationisdead.

p:

accordingtotroud,therearemanyreasonswhydolphinscantlivefulllivesincaptivity.

r:

ifyoutakealookatwheretherealdolphinisintherealocean,youfindthedolphinwhoswims40milesaday,isveryfamily-oriented.theseanimalsareseparatedfromtheirmothers;thatsastress.youputtheminaconcretetankwheretheirsonarbouncesoffofwalls,theycantswiminthesameamountof

timeanddirectionthattheycaninthewild.

p:

environmentalistandoceanexplorer,jeanmichelcousteau:

j:

therearesomeanimalswhichrejectcaptivityrightaway,andtheyreverysuicidal.ivehadoneofthoseinmyownarmsformanydays.thenextmorningwhenicametotakecareofhim,hewasdead.andwhatheddonewastoswimasfastashecouldfromoneendofthepoolon...totheothersideanddestroyedhisheadbyhittingthewall.theyhaveaverysophisticatedbrain.idontthinkwehaveanyrightstoplaywiththelivesoftheseanimals.

p:

cousteausanti-captivitypositionischallengedbydr.deborahduffield,abiologyprofessoratportlandstatecollegeinoregon.her1990studycomparedcaptivedolphinstothewildpopulationofsarasotabay,florida.amongotherfindings,thestudyshowedlittleifanydifferenceintheaverageageofdeath.andduffieldsayslifeisgenerallygettingbetterforcaptivedolphins.

d:

thecensusdatasaythateverytimeidoacensus,ivegotolderandolderanimalsinitaswellasthisnormalagedistributionthatwevebeenlookingat.somyfeelingisthatthetrendincaptivityhasbeenthatthegroupsofanimalsthatwe’refollowingaregettingolder,andiftheycontinuetodothatoverthenextfiveyears,theywillthenindeedbeolderthanthewildpopulation.

p:

thereisalsoadebateovertheeducationalbenefitsofkeepingmarinemammalsincaptivity.accordingtoduffield,captivedolphinsplayanimportantroleinourbasicunderstandingoftheanimals.

d:

ifirmlybelievethatwecannotlearnanythingaboutorganismsthatwesharethisworldwithifwedonotunderstandhowtheyliveinanenvironment,andwhattheydo,andthatwatchingthemgobyinthewildwillnotdoit.icannottellwhatananimalneeds,unlessiknowhowitoperates,howitbreeds,whatitneedsmetabolically,andicantlearnthatfromanimalsinthewild.

p:

buttroudsaysthedolphindisplaysareanti-educationalbecausetheanimalsnaturalbehaviorpatternsarealteredbycaptivity.

r:

inthewild,youdonthavedolphinswhobeateachothertodeath.therearenodolphinsthativeeverseenstrandedonthebeach,whoaresufferingfromfracturedskulls,fracturedribsorfracturedjaws,asisthecaseincaptivity.

p:

theoceanjourneyboardwilltakeallfactorsintoconsiderationbeforemakingafinaldecisiononwhethertoincludedolphinsinthepark.forcoloradopublicradio,impeterjones.

mr.lebaronsaysthereareabout9300differentknownspeciesofbirds.largernumbersofthemliveinthewarmerclimates.forexample,morethan300differentspecieshavebeencountedinpanama,whilefarfewerspeciesarenativetocolderclimates.asidefromtheirestheticvalue,mr.lebaronsaysbirdsareimportanttotheenvironmentbecausetheycansignalchangesinit.

birdsareoneofthebestindicatorsthatwehaveofthequalityoftheenvironmentwithinthegivenarea.whetheritisarelativelylocalarea,orevenprimarilyontheworldwidebases,theyareoneofthefirstthingstobealtered.

theyarequitesensitivetoahabitatalterationortootherthreats.andoftentimeswhenbirdsaredisappearingoutofthearea,itjustmeansthereisadegradationofthe