2. 考研
  3. A mare basin is______. The theory that ocean basins were caused by meteoroid impact______.

A mare basin is______. The theory that ocean basins were caused by meteoroid impact______.

admin2009-04-27  99
问题 A mare basin is______.
The theory that ocean basins were caused by meteoroid impact______.
选项 A、has fallen into wide dispute ever since it was proposed
B、fails to explain how continents were originated and have changed
C、was discarded as unacceptable immediately after it was proposed
D、rightly explains the formation of most of the ocean basins
答案B
解析 细节分析。在文章的第四段提到Gilvarry 的理论，他认为，宇宙尘的碰撞(meteoroid impact)是海洋盆地的成因。作者指出，这个理论模式的主要问题是：多数海洋盆地的结枯形态(morphology)与所说的碰撞不一致，而且，它也没有对大陆(板块)的形成和演化过程做出充分解释。
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考研英语一

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