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Fresh water supplies in Asia and south America is disappearing as the glaciers melt away. According to scientists at the U.S. N
Fresh water supplies in Asia and south America is disappearing as the glaciers melt away. According to scientists at the U.S. N
admin
2013-06-02
52
问题
Fresh water supplies in Asia and south America is disappearing as the glaciers melt away.
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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0
大学英语六级
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