I am wrong taking A as circlar sector

来源: jinjing 于 2010-03-28 19:25:50 [] [旧帖] [给我悄悄话] 阅读数 : (74 bytes)
本帖于 2010-04-08 18:00:37 时间, 由版主 于德利 编辑
回答: 回复：回复：求助：谁能帮我一下？ 由 jinjing 于 2010-03-28 11:25:13

I'm sorry,I'm total wrong, as I think A is circlar sector.You are right.

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