In the solar system, collisions involving cosmic object are among

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In the solar system, collisions involving cosmic object are among the most _____ processes shaping surfaces: images of many solar objects show a proliferation of impact craters formed throughout the past 4.5 billion years.

A、cataclysmic
B、pervasive
C、misleading
D、uncontrollable
E、random

答案：B

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根据proliferation为什么不选d呢

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