题目内容

垄断厂商的需求曲线就是该垄断市场的需求曲线。

A. 对
B. 错

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垄断竞争厂商有两条需求曲线。

A. 对
B. 错

选择主动或被动语态填空。 How did people communicate over long distances before the phone _________ (invent)?

选择主动或被动语态填空。 The project __________________ (complete) next week by our outstanding marketing department.

选择主动或被动语态填空。This house is quite old. It _______ (build) over 100 years ago.

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