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把被子放进满满一缸水里，然后称一称排出的水的重量，就是您老人家被子的分量了，阿基米德就是这么干的。
lemondy
(柠檬2000)
(#29460@0)
Last Updated: 2001-3-1
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原来空气没重量！我一条12斤的被子，抽成真空还是12斤！
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