家用方法治疗白癜风 http://news.39.net/bjzkhbzy/180202/6039424.html

一、听力练习

1.

A.80%.

B.5.6%.

C.15%.

D.30%.

2.

A.Internationalfishingactivities.

B.Destructionofnestinggrounds.

C.Climatechange.

D.Nuclearpollution.

二、听力文本

ScientistssaytherehasbeenamajordropinthepopulationofleatherbackseaturtlesofftheU.S.WestCoast.Researcherssaytherewasan80percentdropinonegroupofleatherbacksfoundofftheCaliforniacoastoverthepast30years.Onerecentstudyfounda5.6percentyearlydecreaseinthepopulation.SimilarpopulationdecreaseshavealsobeendocumentedatbeacheswhereleatherbacksnestonthewesternPacific.Scientistssaythatifnothingchanges,theleatherbackscould