题目内容
人类社会的第一次社会大分工是()。
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Dan has a membership at a local gym that also gives classes three nights a week. On any given class night, Dan has the option of taking yoga, weight training, or kickboxing classes. If Dan decides to go to either one or two classes per week, how many diff
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听力原文：M: Let me see. I have printed my family name, first name, date of birth, and address. Anything else？
W: No. That' s all right. We' ll fill in the rest of it if you just sign your name at the bottom.
What has the man been doing？
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