1. 选出正确的译文：Exports and imports of goods between nations with different units of money introduce a new economic factor, the foreign exchange rate, which gives the price of the foreigners unit of money in terms of one’s own. (2分)
3. 选出正确的译文：A hypothesis is a specific statement developed by a scientist from observations. (2分)
1. 选出正确的译文：Exports and imports of goods between nations with different units of money introduce a new economic factor, the foreign exchange rate, which gives the price of the foreigners unit of money in terms of one’s own.
