就是这个，BA5和AoPS pre-algebra一半内容重合,但是还是很好的过渡.

来源: Pilsung 于 2020-10-27 10:18:25 [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.

Change Ad Consent