1+1=2 和 1-1 =0 都有可能。

來源: 湘西山民於 2012-12-11 07:00:10 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.