40磅，50磅书包也是一样的道理。

来源: 蒙得于 2015-07-23 10:59:07 [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.