my son makes mistakes in 基本四则运算. But he made

来源: 于 2007-09-19 13:18:22 [旧帖] [给我悄悄话] 本文已被阅读：次

the high school team. and kids good at 基本四则运算 couldn't make the team. he never got 100% right because he make mistake in 基本四则运算.