The saying that "There is no such thing as a free lunch," means ________.
A、even people on welfare have to pay for food
B、the cost of living is always increasing
C、people face tradeoffs
D、all costs are included in the price of a product
A、even people on welfare have to pay for food
B、the cost of living is always increasing
C、people face tradeoffs
D、all costs are included in the price of a product
微观经济学（全英）
章节列表
1. General Overview of Economics282. Principles of Economics353. Circular-Flow Diagram and PPF204. Interdependence and Trade205. Demand and Supply756. Elasticity717. Price Control and Taxation408. CS, PS and the Efficiency of Markets109. Costs of Taxation2510. International Trade3011. Externalities3112. Public Goods and Common Resources2013. The Costs of Production20