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标题: marble layer on earth [打印本页]

作者: salmonfish    时间: 2006-12-10 22:54
标题: marble layer on earth

将1摩尔的玻璃球(marbles)撒在地球表面上将会在地球上形成多厚的一层呢?

Entertaining question for 1st year's science students.

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