【单选题】 Which of the following aspects is not what an economic union concerns？【】（外贸考试,外销员,外经贸英语答案）

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【单选题】 Which of the following aspects is not what an economic union concerns？【】

Acommon currency

Bharmonized tax rates

Charmonized tax rate structures

Dcommon political policy

答案解析

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