孩子做不出來，老爸著急唄。不過這類數學題蠻好玩的，PAUL是高手啊！

來源: yasas 於 2012-02-19 06:28:10 [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.