水是从哪里来的小学五年级英语作文简单写

水是从哪里来的小学五年级英语作文简单写

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第1个回答 2016-12-14

of the self that ⒈.The earth from the original nebula condensed into planets,due to the internal temperature and gravity,the material differentiation and convection occurs,then the gradual differentiation of the Earth circle.In the differentiation process,hydrogen,oxygen and other gases floating to the surface,and through a variety of physical and chemical effects of water the last generation.

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