外汇汇率有三种形式，即：买进汇率、售出汇率和两者的平均值——中间汇率。

外汇汇率有三种形式，即：买进汇率、售出汇率和两者的平均值——中间汇率。
【正确答案】：There are three types of foreign exchange price namely: the buying rate, the selling rate and the average of the previous two-the medial rate.