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何谓错,何谓对?

Posted by ferret_chao at 2005-04-02 17:56:16 on Problem 2387
在现实生活中,从一个地方走到另一个地方,真的指存在一条路吗?有重边不是很正常的事??你从宿舍走到教室有几条路呢?^o^

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