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这样的说明是不行的,为什么“必”呢?为什么拿掉更多的方格的时候就不一定行了?

Posted by frkstyc at 2005-07-28 14:57:01 on Problem 2495
In Reply To:一个黑格必和一个白格匹配 Posted by:sunmoonstar_love at 2005-07-28 14:54:02


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