哈哈

来源: yddad 于 2011-11-03 07:01:24 [] [旧帖] [给我悄悄话] 阅读数 : 0 (101 bytes)
回答: You were confused again 由 michigan007 于 2011-11-03 06:23:18

I didn't say it is wrong. what I say is you have to use math way to prove during your ansewer.

请您先登陆，再发跟帖！