相关推荐： gre机经题库 gre阅读高频题
想必大家在备考gre考试的时候，最喜欢的就是吸取新鲜的考试真题，这样对自己的能力也是一个考验，最能检验自己目前的能力在什么水平，今天小编为大家带来的就是GRE阅读高频机经原文及答案：Sea Cow!
GRE阅读高频机经原文及答案：Sea Cow
Sea Cow
The disappearance of Steller's sea cow from the Bering and Copper is lands by 1768 has long been blamed on intensive hunting. But its dis appearance took only 28 years from the time Steller first described the species, a remarkably short time for hunting alone to depopulate the is lands, especially given the large populations initially reported. However, by 1750, huntershad also targeted nearby sea otter populations . Fewer otters would have allowed s ea urchin populations on which the otterspreyed to expand and the urchins ' grazing pressure on kelp forests to increase. Sea cows were totally dependent on kelp for food, and within a decade of the onset of otter hunting Steller noted that the is lands' sea cows appeared malnourished.
请关闭浏览器的畅读模式或者取消屏蔽JavaScript的正常运行，避免出现内容显示不全或者段落错乱。
原网页地址：https://www.potelypower.com/xuexi/466820.html