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最佳答案：The theory on the earth‘s round
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最佳答案：正确的.就是说现在地球污染严重了,越来越需要我们的保护了.
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最佳答案：Columbus exploded the theory that the earth was a plane.
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最佳答案：The oceans are the source of life on the earth.
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最佳答案：the earth is 49 times biger than than the moon
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最佳答案：Because the earth is our home,we should cherish it.
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最佳答案：The water,you are Earth's blood.You,on the Earth have not had the life.The water
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最佳答案：Meteor is solid particle in space moving close to the earth and being pulled by
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最佳答案：这句话的意思是 我的老师告诉我地球是圆的,我是在学校学习的时候从书本上知道的
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最佳答案：Many scientists believe that it's human's activities that make our earth get war