选择题：即期外汇交易所依据的汇率被称为 A.即期汇率B.远期汇率C.买入汇率D.卖出汇率

48. ___how the splendid Maya Culture disappeared all of a sudden from the earth,

14. Mrs. Brown as well as her children___ to go Paris on holiday next week.(本题1.

[填空题,2分] 指人们对一国的货币丧失信心，大量抛售该国货币，从而导致该国货币的汇率在短时间内急剧贬值的情形。

[填空题,2分] 是指对于跨国公司的海外子公司，在缴纳当地税款之后，再按照国内税率进行征税。

28. Hardly had they arrived at the airport ___the plane started to leave.(本题1.0分