今天yahoo的头版news之一，觉得蛮有用，贴上来：）

来源: lumom 于 2012-04-18 18:03:25 [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.