Doing business with foreigners, traveling abroad and shopping need to use foreign exchange. Foreign exchange is () A. Means of payment for transfer settlement B. Used in China.

Analysis of test questions: This question examines foreign exchange, which is a means of payment for international settlement expressed in foreign currency, so point B is in line with the meaning of the question. Item A refers to the role of credit cards and checks, item C refers to exchange rates, and exchange rates and foreign exchange are two different concepts. Item D is the characteristics of credit cards, so the answer should be B.