What kind of job did you do? ( ).(本题3.5分) A、 worked at a bookstore on campus. B、 Yes. I brewed coffee in the Student Union. C、 But selling books was satisfying. D、 I need to earn the money.
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3 .利用历史资料分析法的各种具体应用方法建立成本模型时,计算步骤正确的有( )A . 先求
3 .利用历史资料分析法的各种具体应用方法建立成本模型时,计算步骤正确的有( )A . 先求 b 后求 a B .先确定 s 后求b