地球到底是实心的还是空心的 如果是空心的话…………
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![地球到底是实心的还是空心的 如果是空心的话…………](/uploads/image/z/13160341-37-1.jpg?t=%E5%9C%B0%E7%90%83%E5%88%B0%E5%BA%95%E6%98%AF%E5%AE%9E%E5%BF%83%E7%9A%84%E8%BF%98%E6%98%AF%E7%A9%BA%E5%BF%83%E7%9A%84+%E5%A6%82%E6%9E%9C%E6%98%AF%E7%A9%BA%E5%BF%83%E7%9A%84%E8%AF%9D%E2%80%A6%E2%80%A6%E2%80%A6%E2%80%A6)
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