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Re:是否可以证明 n条直线，无3线共点，交点的范围为 0 and n-1至（n，2）？In Reply To:是否可以证明 n条直线，无3线共点，交点的范围为 0 and n-1至（n，2）？ Posted by:mkomko123 at 2005-01-26 19:40:10 晕了，不对。。。。我哭。 Followed by:
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