2. 职称英语
  3. Fresh water supplies in Asia and south America is disappearing as the glaciers m

Fresh water supplies in Asia and south America is disappearing as the glaciers m

游客2023-08-31  46
问题 Fresh water supplies in Asia and south America is disappearing as the glaciers melt away. [br] According to scientists at the U.S. National Snow and Ice Data Center, within about 60 years, there will be ______ on the Arctic Ocean.
选项
答案 no summer ice at all
解析 根据题干中的信息词U. S. National Snow and Ice Data Center和60 years定位到第四个小标题下的第二段，可知从美国国家雪冰数据中心的科学家那里得知，海上冰的覆盖率在逐年降低，他们统计出缩减率现在是每十年缩减大约8%，也就是说不到60年，北冰洋上就没有夏冰了，由此可得答案。
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