Sorry, try again.

來源: InnerCool 於 2009-10-11 22:08:23 [] [博客] [舊帖] [給我悄悄話] 閱讀數 : (121 bytes)
回答: It is possible using the Fano plane 由 innercool 於 2009-10-10 14:18:11
請您先登陸，再發跟帖！