另外多说一句，三年级解方程太早。专家都这么说。

来源: incywincy 于 2016-01-16 20:42:13 [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.