b1 only, B有1，2，4，6，12.。。

来源: ^3.1415926^ 于 2011-02-10 09:06:52 [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.