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NEW theories propose that catastrophic impact of asteroids and comets may have caused reversals in the Earth’s magnetic field , the onset of ice ages ,splitting apart continents 80 million years ago ,and great volcanic eruptions A splitting apart continents B the splitting apart of continents C split apart continent D continent split apart E continent that were split apart
题目最后是逗号加and 我想问下 几个内容连接时加逗号再加and 和不加逗号加and 有什么区别 谢谢了 |
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