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(1)天平左右各6个,在轻的那边或没放的那个 (2)左右各3个,在轻的那边(3)左右各1个,是轻的或没放的那个
mainstream
(主流)
(#238612@0)
Last Updated: 2001-10-26
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不是微软试题，13个球，有一个球和其他的重量不一样，外观一样。用一个天平称三次，把那个球找出来。你能做到吗？嘿嘿。。。
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