未分类题

边际效用是指( )。

A.消费者在一定时间内连续消费某种物品所得到的全部满足
B．消费者每增加一单位物品或劳务所得到的新增加的满足
C．消费最后一单位物品所提供的效用
D．每增加一单位物品的消费所引起的总效用的增量

【参考答案】

B,C,D

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单项选择题

违约方支付违约金后,就可不再履行合同义务。( )

A.正确
B．错误

单项选择题

W: Mary worked as a secretary for three years. Then she became a reporter. After that she started writing novels.M: As far as I know, she has not taken any other job ever since.Q: What is Mary’s occupation now?（）

A．She is a secretary.
B．She is a reporter.
C．She is a novelist.
D．She is a shop assistant.

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