题目内容

Economic models

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.

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The circular-flow diagram is an example of

A. a laboratory experiment.
B. an economic model.
C. a mathematical model.
D. All of the above are correct.

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A circular-flow diagram is a model that

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.

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In the simple circular-flow diagram, the participants in the economy are

A. firms and government.
B. households and firms.
C. households and government.
D. households, firms, and government.

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Factors of production are

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.

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Economic models

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.

The circular-flow diagram is an example of

A circular-flow diagram is a model that

In the simple circular-flow diagram, the participants in the economy are

Factors of production are

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.