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[【其它】] 现在天涯、doban上很火的一个讨论:10N的水能产生大于10N的浮力? |
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发表于 2010-5-25 00:04:07
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发表于 2010-5-25 09:24:39
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发表于 2010-5-25 09:48:22
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发表于 2010-5-25 10:08:43
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发表于 2010-5-25 10:54:29
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发表于 2010-5-25 15:46:09
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