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题目材料:
According to the passage, which of the following is true of the collisions mentioned in the highlighted sentence?
The passage suggests that which of the following is true of the cited compounds and elements?
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AThey were created by reactions that took place during a titanic collision.
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BThey were supplied by an impactor that collided with Earth.
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CThey were once present on the Moon but were subsequently vaporized.
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DThey are rarely found on planet-size bodies in our solar system.
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EThey are present on Earth but not on the Moon.
E显示答案