答案及解析：[单选题]The dual exchange rates in China from 1986 to 1993 refer to the co-existence of ( ). Aofficial rate

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[单选题]

The dual exchange rates in China from 1986 to 1993 refer to the co-existence of ( ).

Aofficial rate and market rate

Bofficial rate and swap rate

Ctrade exchange rate and non-trade exchange rate

Dfinancial exchange rate and trade exchange rate

答案解析：

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