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不要纠结几年级,娃水平就是4-5年级高一点的level而已,AOPS线上课没学过,我个人一直是觉得数学根本不应该补课,现在开始动摇

hbsherry (铁蛋妈Sherry)
(#13067942@0)
7-7 -04:00
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Back To Topic: 不是BSO,诚心问一下暑假有必要补优吗

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