试题图2-2所示基本液压回路具有（）作用。
A.调速
B.调压
C.换向
D.卸荷
参考答案：A, B
当代学生角色扮演有哪些冲突和变化？
Why are payments NOT usually netted out in a currency swap()
A. There are no payments in a currency swap except at initiation and maturity.
B. The notional principal is not swapped at initiation.
C. The payments are denominated in two different currencies.
