AP 课和 pre-calculus BC 就不只15 分钟的作业。这个有点神了

来源: Changshi 于 2018-12-31 11:26:58 [旧帖] [给我悄悄话] 本文已被阅读：次

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AP 课 和 pre-calculus BC 就不只15 分钟的作业。这个有点神了