According to the business hours of the foreign exchange bank, the exchange rate can be divided into（）
A. opening and closing exchange rates
B. buying and selling exchange rates
C. t/t rates, d/d rates and m/t rates
D. spot and forward exchange rates
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SDRs means（）
A. reserve assets and unit of account created by IMF
B. currency created by the European Economic Monetary Union
C. the central currency of the European Monetary System
D. a special right to use funds created by the World Bank
The international lending theory holds that the reason why a country’s currency depreciates is because（）
A. current liabilities are greater than current claims
B. current claims are greater than current liabilities
C. there are more fixed claims than fixed debts
D. There are more fixed debts than fixed claims
Foreign exchange in the dynamic sense refers to（）
A. international clearing activities and practices
B. the generation of foreign exchange
C. transfer of foreign exchange
D. foreign exchange reserves
Foreign exchange in the broad sense refers to all（）expressed in foreign currency
A. financial assets
B. foreign exchange certificates of deposit
C. foreign cash
D. foreign currency securities
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