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2012新GRE阅读难句解读二

Other theorists propose that the Moon was ripped out of the Earth‘s rocky mantle by the Earth’s collision with another large celestial body after much of the Earth‘s iron fell to its core. (4)其他的理论家提出,在地球的大部分铁沉入到地核之后,由于地球与另一个庞大的天体发生...

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