Sorry, try again.

来源: InnerCool 于 2009-10-11 22:08:23 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (121 bytes)
回答: It is possible using the Fano plane 由 innercool 于 2009-10-10 14:18:11
请您先登陆，再发跟帖！