高中英语必修听力部分 15页

Unit4WildlifeProtectionPart5AnimalExtinctionEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.\nName:TheFalklandIslandsWolforWarrah（南极狼）Extincttime:1876Possibleextinctreason:Huntershavefrequentlykilledthemintheevening,byholdingoutapieceofmeatinonehand,andintheotheraknifereadytokillthem,sotheydecreasedrapidly.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.\nName:Mexicangrizzlybear(墨西哥灰熊)Extincttime:1964Possibleextinctreason:Becausebearshuntedthecattlefromtimetotimetheywereconsideredapestbyfarmers.Theyweretrapped,shotandpoisoned,andhadbecomeextinct.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.\nName:Thegiantmoa(Dinornis)(恐鸟)Extincttime:1950sPossibleextinctreasons:Peoplehuntedthemforfoodbecausetheirmeatwereverydeliciousandnutritive.Theforestswerecutandburneddownandthegroundwasturnedintoarableland,thegiantmoahadbeenextinctEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.\nThevolcaniceruptiondestroyedtheirlivingenvironmentsothattheybecameextinctButotherpresumedthatitisbecausetheoutbreaktheepidemicwhichmadetheirnumberdecreaserapidlyEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.\nDinosaursEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.\nWhydidtheybecomeextinct?1.Ahugerockfromspacehittheearthandputtoomuchdustintotheair.2.Theearthgottoohotforthedinosaurstoliveonanymore.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.\nTheotherpossiblereasonsVolcaniceruptionsThehighvolcanicactivitiescontributedtotheextinctionofdinosaurs,becausethevolcanoescouldeasilycovertheearthinenoughdustandsmogwhichcausedthevolcanicwinterandiceage.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.\nThefiercecompetitionbetweenthespeciesEarlymammalsgraduallyincreasedandthetemperaturechanges,thefoodsourceoftheplant-eatingdinosaursbecomelessandless,whichleadtofewerandfewerfoodsourceofmeat-eatingdinosaurs,what’smoremammalsalsoatethebabydinosaursanddinosaurs’eggs.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.\nTheDodoisanextinctflightlessbird,itwasabout1metertallandmayhaveweighed10.6–21.1 kginthewild.Theirappearanceinlifeisevidencedonlybydrawings,paintings,andwrittenaccountsfromtheirfossils.Ithasbeendepictedwithbrownish-greyfeathers,yellowfeet,atuftoftailfeathers,agrey,nakedhead,andablack,yellow,andgreenbeak.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.\nEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.\nWhydidtheybecomeendangered?Becausetheywerehuntedforfoodinthepast.Whatwehavedonetoprotectthem?GovernmentintendtoestablishMiluNaturalReserveinordertoprotectthemfromextinct.SomemiludeerweretakentoBritainwherethecoolandwetweatherweresuitbaleforthemtosurvive.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.\nWhatotherendangerdanimalsdoyouknow?Whathappenedtothem?Whatcanwedoforthem?Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.\nVSProSideConSideKeepingAnimalsinTheZooisGoodorHarmfulforThem?Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.\nThankyouEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.