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Re:回头看看那些小学数学奥赛书,发现有许多东西蛮有意思的In Reply To:小学参加奥赛的时候在一本奇妙的9上面看到过这个结论。。。 Posted by:mmd at 2006-08-02 08:37:52 Followed by: Post your reply here: |
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