谢谢提醒，娃在8年级已经去AOPS 上过pre cal 了，虽然只会做一半题目。9年级高中再学一遍估计问题不大

来源: 年轮于 2025-06-20 22:12:03 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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