芝大的经济专业不好学，朋友女儿几年前也差点过不了这坎，有门经济课要用离散数学怎么都听不懂

来源: Joe2013 于 2025-10-29 13:12:55 [旧帖] [给我悄悄话] 本文已被阅读：次

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