高中英语必修听力部分

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1、Unit4WildlifeProtectionPart5AnimalExtinctionEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Name:TheFalklandIslandsWolforWarrah（南极狼）Extincttime:1876Possibleextinctreason:Huntershavefrequentlykilledthemintheevening,byholdingoutapieceofmeatinonehand

2、,andintheotheraknifereadytokillthem,sotheydecreasedrapidly.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Name:Mexicangrizzlybear(墨西哥灰熊)Extincttime:1964Possibleextinctreason:Becausebearshuntedthecattlefromtimetotimetheywereconsideredapestbyfarmer

3、s.Theyweretrapped,shotandpoisoned,andhadbecomeextinct.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Name:Thegiantmoa(Dinornis)(恐鸟)Extincttime:1950sPossibleextinctreasons:Peoplehuntedthemforfoodbecausetheirmeatwereverydeliciousandnutritive.Thefor

4、estswerecutandburneddownandthegroundwasturnedintoarableland,thegiantmoahadbeenextinctEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.ThevolcaniceruptiondestroyedtheirlivingenvironmentsothattheybecameextinctButotherpresumedthatitisbecausetheoutbrea

5、ktheepidemicwhichmadetheirnumberdecreaserapidlyEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.DinosaursEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Whydidtheybecomeextinct?1.Ahugerockfromspa

6、cehittheearthandputtoomuchdustintotheair.2.Theearthgottoohotforthedinosaurstoliveonanymore.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.TheotherpossiblereasonsVolcaniceruptionsThehighvolcanicactivitiescontributedtotheextinctionofdinosaurs,becau

7、sethevolcanoescouldeasilycovertheearthinenoughdustandsmogwhichcausedthevolcanicwinterandiceage.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Thef