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我现在去打水。我只推出了四个三角形的公式，一看这题麻烦，就没做下去，哈哈In Reply To:恩，有4个的情况，有0个的情况，有对三角，有四边形，请问还差什么情况？ Posted by:sunmoonstar_love at 2005-08-19 22:16:22 Followed by:
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