今天，牛顿第一个交作业，估计很有共鸣。哈哈。

来源: beautifulwind 于 2011-11-10 22:57:48 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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