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Posted by sothink at 2009-10-18 20:48:44 on Problem 3449
In Reply To:这道计算几何题目里边已知正方形一条对角线上两点坐标如何求另外两点坐标? Posted by:omllyf at 2009-10-18 20:39:41
> 如题,我的意思应该表达清楚了吧!

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