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  3. What does the passage mainly discuss? Why does the author mention the Weddell Sea?

What does the passage mainly discuss? Why does the author mention the Weddell Sea?

admin2012-09-10  29
问题 What does the passage mainly discuss?
Why does the author mention the Weddell Sea?
选项 A、To show that this body of water has salinity variations.
B、To compare Antarctic waters with Arctic waters.
C、To give an example of cold-water salinity.
D、To point out the location of deep waters.
答案C
解析 作者在第四段中谈及影响海水浓度降低的原因之一：结冰海水的融化；紧接着在文章第五段，作者提到了Wedell海，从此段第一句话“In the Wedell Sea of Antarctica，the denest water in the oceans is formed as a result of this freeaing process．”可看出作者用Wedell海的例子对第四段进一步说明，故C项为正确答案；A、B、D项文中均未提到。
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