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Re:用不标明题意糊弄人，……水……

Posted by fireleg at 2012-06-10 17:18:37 on Problem 2304
In Reply To:用不标明题意糊弄人，……水…… Posted by:liushuwen at 2009-08-30 09:04:57 
> 他描述的顺时针是你看上去逆时针的方向
thx!
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