A. are not useful because they omit many real-world details. B. are usually composed of diagrams and equations. C. are useful because they do not omit any real-world details. D. are usually plastic representations of the economy.
A. a laboratory experiment. B. an economic model. C. a mathematical model. D. All of the above are correct.
A. helps to explain how participants in the economy interact with one another. B. helps to explain how the economy is organized. C. incorporates all aspects of the real economy. D. Both (a) and (b) are correct.
A. firms and government. B. households and firms. C. households and government. D. households, firms, and government.
A. the mathematical calculations firms make in determining their optimal production levels. B. social and political conditions that affect production. C. the physical relationships between economic inputs and outputs. D. inputs into the production process.
A. 生产可能性边界。 B. 循环流量图。 C. 供需图。 D. 比较优势模型。
A. 家庭和企业都是购买者。 B. 家庭和企业都是卖方。 C. 家庭是买者,企业是卖者。 D. 家庭是卖家,企业是买家。
A. 家庭为企业提供劳动力、土地和资本。 B. 家庭为企业提供投资储蓄。 C. 公司为家庭提供商品和服务。 D. 公司为家庭提供利润。
A. 利润从家庭流向企业。 B. 劳动力从家庭流向企业。 C. 服务从家庭流向企业。 D. 以上都对。
A. 政府增加了经济中的货币数量。 B. 有技术改进。 C. 资源从一种商品的生产转移到另一种商品的生产。 D. 经济摒弃低效的生产方式,支持高效的生产方式。
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