轻度白癜风能治吗 https://m-mip.39.net/nk/mipso_4497438.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