你自己看看他的作业，应该能应付？那就和他一起看Khan Academy 陪她一起学试试看？看你能找到问题在哪儿吗？

来源: randomness 于 2024-01-15 06:21:18 [旧帖] [给我悄悄话] 本文已被阅读：次

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