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Re:圆上两点连线段如何连到圆外面去？？

Posted by peargobble at 2011-07-20 18:35:13 on Problem 3207
In Reply To:圆上两点连线段如何连到圆外面去？？ Posted by:allen4053040allen at 2011-07-20 17:22:37 
> 
绕一圈……从圆外面啊，没说是直线
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