Microeconomics examines which of the following?______.A、Gross national productB

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问题 Microeconomics examines which of the following?______.

选项 A、Gross national product
B、Trade policy
C、Exchange rates
D、Firm competition

答案 D

解析答案为D项。四个选项除D项“厂商竞争”属于微观经济学的研究范畴，其余都属于宏观经济学范畴，故选D项。

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