对，这两个门要加，所以只是习惯，没有规律可循。

来源: 慧目于 2011-06-10 13:30:07 [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.