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  3. A、The results of geographical survey prove that no crater larger than twelve kil

A、The results of geographical survey prove that no crater larger than twelve kil

游客2025-02-23  6
问题
选项 A、The results of geographical survey prove that no crater larger than twelve kilometers exists on the surface of Mars.
B、Fragments from smaller impact events on Mars are highly unlikely to survive entry through the Earth’s atmosphere.
C、The velocity of rocks escaping from Mar’s gravity is greater when they have been loosened by a large impact.
D、Huge impacts on Mars are proven to be less rare than was previously thought.
E、A double-succession of large impacts is found to have occurred on Mars in a relatively short period of time.
答案 B
解析
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