這個問題本壇已經有人回答過多次了，自己搜索一下吧。

來源: 墨鬥魚於 2006-12-22 19:20:28 [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.