许纯舫的书是初中用的额外资料，难度比大学的几米多维奇低多了

来源: deepsigh 于 2019-05-01 07:16:53 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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许纯舫的书是初中用的额外资料， 难度比大学的几米多维奇低多了