示波器操作注意事项?

A. the prices that a country pays for its imports and the prices that the country receives for its imports.
B. the flows of value between that country’s residents and residents of the rest of the world during a period of time.
C. capital gains and losses on a country’s international assets.
D. the value of a country’s holdings of foreign assets, minus the value of foreign holdings of the country’s assets.

A. an item for which the country must be paid.
B. any loan given out by the country.
C. any imported item.
D. an item that creates a monetary claim owed to a foreigner.