折り返しお電話いただけるとありがたいんですが。
参考答案：如果能回个电话就好了。
如果出口人坚持收强币，进口人可能会面临汇率波动风险，为避免风险，该交易便无法进行了。
Which of the following most accurately describes the relationship between the average total cost (ATC) curve and the average variable cost (AVC) curve The vertical distance between the ATC and AVC curves:（）
A. decreases as output increases.
B. increases as output increases.
C. remains constant as output increases.
