2. 外语
  3. Climate change has brought about such problems as bleaching-induced【S1】______of corals. Bleaching occurs when corals axe stresse

Climate change has brought about such problems as bleaching-induced【S1】______of corals. Bleaching occurs when corals axe stresse

admin2010-04-12  38
问题     Climate change has brought about such problems as bleaching-induced【S1】______of corals. Bleaching occurs when corals axe stressed by high temperature or other【S2】______changes, and lose their symbiotic algal cells. When they lose these cells, which provide the corals with essential【S3】______and give them their color, they can die. Reefs are important for livelihoods, and fisheries and tourism, and are the main【S4】______along the eastern African coast as well as【S5】______many of the islands of the Western Indian Ocean.
    In college during the ’70s, I joined an expedition to the Malindi Marine Park-one of the first MPAs (marine protected areas) to be established in Africa-where we【S6】______in a well-protected reef. But over the years, that reef has been completely devastated by the bleaching. It was truly【S7】______to see such a vibrant and healthy reef reduced almost to the status of an unprotected one.
    Recently, coral reefs have received a great deal of attention, especially following the 1997/ 1998 bleaching event that【S8】______70 percent of the reefs of the region. Through a regional task force, a coral reef strategy with an emphasis on MPAs is【S9】______under development. Countries in the region are also involved in a【S10】______reef research project to better understand the impacts of coral bleaching.

A) depressed            B) nutrients              C) devastated             D) morality
E) environmental        F) globally-targeted      G) desperately            H) ecosystem
I) dove                 J) depressing             K) mortality              L) available
M) currently            N) gloomily               O) fringing
【S2】
选项
答案E
解析 根据文意，珊瑚受到高温或其他环境变化的威胁，且失去了与其共生的海藻细胞时，漂白就出现了。这里应表达“环境变化”之意，environmental符合题意，故选E)。
转载请注明原文地址:https://kaotiyun.com/show/tnj7777K
0

大学英语四级

相关试题推荐
随机试题
最新回复(0)