A circular-flow diagram is a model that A: Both helps to explain how participants in the economy interact with one another and helps to explain how participants in the economy interact with one another are correct. B: helps to explain how participants in the economy interact with one another. C: helps to explain how the economy is organized. D: incorporates all aspects of the real economy.

Inflation is defined as ( ). A: an increase in the overall level of prices in the economy B: a period of rising productivity in the economy C: an increase in the overall level of output in the economy D: a period of rising income in the economy

地摊经济怎么说 A: the street-stall economy B: economy

虚拟经济的范畴通常有哪几种（ ）。 A: Fictitious Economy B: Visual Economy C: Virtual Economy D: FinancialEconomy

A—Socialist Economy B—Capitalist Economy C—Collective Economy D—Planned Economy E—Controlled Economy F—Rural Economics G—Liberal Economy H—Mixed Economy I—Political Economy J—Protectionism K—Primary Sector L—Public Sector M—Economic Channels N—Economic Balance O—Economic Fluctuation P—Economic Depression Q—Economic Stability R—Economic Policy S—Economic Recovery T—Economic Trend U—Economic Situation ______自由经济 ______经济形势