後來想通了,真的是三次,喜歡這種推理題。自己也不時做相似的。
所有跟帖:
• 我居然把題看錯了,以為次品是重球。 -SunshineInCA- ♀ (0 bytes) () 12/31/2012 postreply 17:30:39
• 我居然把題看錯了,以為次品是重球。 -SunshineInCA- ♀ (0 bytes) () 12/31/2012 postreply 17:30:39
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