单选题
初级
2010-11-03
According to the passage,conversion rates
参考答案
B
答案解析
见文中第二段：This conversion rate is determined by every market…although it will often fluctuate from day to day．意思是“汇率是由每个市场决策的……虽然它经常每天都有所浮动”，故该题选B。
