朋友父亲80岁，以前是中学数学老师，退休后的爱好之一是做数学题，据说每天做一张数学卷子，见过几次面，感觉头脑思维清晰

来源: newxiaoshuye 于 2025-08-11 19:38:21 [旧帖] [给我悄悄话] 本文已被阅读：次

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