according to the passage, the floor of the black Sea can best compared to a
A,rapidly moving conveyor belt
b slowly settling foundation
c rapidly expanding balloon
d violently erupting volcano
e slowly eroding mountain
文章中最后一段都在讲海床的向下陷，有两种可能，一种是沉积物很多，另一种上面的气流压得，但是不知道究竟什么原因造成的，gulf of mexico, the black sea, north sea 都是海床向下陷的代表，。。是这个意思吗。。。。这道题答案为什么选b阿。。我选E,,,x向下陷不就是eroding mountain...的感觉吗。。。谢谢！！！！
文中“similar origin”(line 55)可知Black Sea 对比的是line 44的Sea of Japan,再找到line 46的"floor is overlaid by several kilometers of sediment"(被上千米厚的沉积物所覆盖),这么多沉积物不会一日而成-----------由此推出选项B: slowly settling foundation
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发表于 2008-5-23 03:31:00
