【单选题】I think lots of students like the pop singer named Jay. I also like him very much. Do you know as a boy ,Jay was called Dull Stupid. But his mother noticed that the quiet, shy boy seemed to dance well...
【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: