小J啊，你不要年龄歧视，好不好？回家好好学一学集合论基础

来源: 吾于 2019-11-17 06:55:39 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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小J啊，你不要年龄歧视 ，好不好？回家好好学一学集合论基础