【单选题】If wheat costs $4 per bushel in the United States and 2 pounds per bushel in Great Britain, then in the presence of purchasing-power parity the exchange rate should be:
【简答题】Last year, these ships transported a total of 83. 34 million tons of cargo, a 4. 4 per cent increase______________ the previous year. [A] over [B] than [C] up [D] beyond