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  3. Fresh water supplies in Asia and south America is disappearing as the glaciers melt away. The ice tongue growing out from the G

Fresh water supplies in Asia and south America is disappearing as the glaciers melt away. The ice tongue growing out from the G

admin2009-08-19  43
问题 Fresh water supplies in Asia and south America is disappearing as the glaciers melt away.
The ice tongue growing out from the Greenland coast used to reject salt back into the water, making ______ heavier and helping it to sink.
选项
答案the water。
解析 根据题干中的信息词ice tongue和Greenland coast定位到原文倒数第三段，可知格陵兰海域中部在夏季不会冻结，但在冬季，通常会被从格陵兰海岸延伸而出的一大片冰覆盖，这片冰会释放盐分回到水中，从而增加水的密度，并使其下沉，而自1997年以来，这块冰舌就没有再出现过，由此可得答案。
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大学英语六级

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