回复：关于:13个球秤3次,找出异常球并指出轻重!?

来源: 于 2010-05-03 17:54:46 [旧帖] [给我悄悄话] 本文已被阅读：次

You are great.If you can do this by heart and not old,you could become a math prof. I like do questions by heart,so, a lot of mistakes,I'm sorry.Good luck.