Under ______ fluctuations of the exchange rate within a definite period of time will not immediately affect domestic money circulation and is helpful to the stability of the economy.
A、the fixed exchange rate system
B、the flexible exchange rate system
C、the direct exchange rate
D、the indirect exchange rate
【正确答案】：B
【题目解析】：Under the flexible exchange rate system fluctuations of the exchange rate within a definite period of time will not immediately affect domestic money circulation and is helpful to the stability of the economy.
参见教材P229。