40. What is the main idea of the passage?
(A) The relation between the amount of money in circulation and the amount of goods and services being produced.
(B) The relation between the prices of the goods and services and the number of idle factories and people.
(C) The relation between the amount of money in circulation and the degree of deflation in a country.
(D) The relation between different economic systems and the amount of money in circulation.
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統計: 尚無統計資料
統計: 尚無統計資料