几何证明是证明题的入门，不过中级袋鼠也有不少证明题．偶尔AoPS中级袋鼠书上也很有个别证明题无从下手．

来源: Pilsung 于 2025-07-07 08:39:38 [旧帖] [给我悄悄话] 本文已被阅读：次

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