虽然数学竞赛是单枪匹马，但是有一帮小孩一起练互相商讨才比较有劲头，包括在网上。

来源: Numero 于 2025-06-09 03:51:38 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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