大学MOOC PrinciplesofMicroeconomics(上海外国语大学)1461783172 最新慕课完整章节测试答案

测验

1、单选题：
‌A city street is​
选项：
A: always a public good, whether or not it is congested.
B: always a common resource, whether or not it is congested.
C: a public good when it is congested.
D: a common resource when it is congested.
答案: 【 a common resource when it is congested.】

2、单选题：
​Which of the following is not a public good?‏
选项：
A: national defense
B: patented technological knowledge
C: general knowledge
D: tornado siren
答案: 【 patented technological knowledge】

3、单选题：
‏Which of the following is not considered a common resource?‏
选项：
A: streetlight.
B: a congested road.
C: book from a public library.
D: elephants in the wild.
答案: 【 streetlight.】

测验

1、单选题：
‍Katherine gives piano lessons for $15 per hour. She also grows flowers, which she arranges and sells at the local farmer’s market. One day she spends 5 hours planting $50 worth of seeds in her garden. Once the seeds have grown into flowers, she can sell them for $150 at the farmer’s market. Katherine’s accounting profits are‌
选项：
A: $100, and her economic profits are $25.
B: $100, and her economic profits are $75.
C: $25, and her economic profits are $100.
D: $75, and her economic profits are $125.
答案: 【 $100, and her economic profits are $25.】

2、单选题：
‏David’s firm experiences diminishing marginal product for all ranges of inputs. The total cost curve associated with David’s firm‍
选项：
A: gets flatter as output increases.
B: gets steeper as output increases.
C: is constant for all ranges of output.
D: is unrelated to the production function.
答案: 【 gets steeper as output increases.】

3、单选题：
‍When a firm is experiencing diseconomies of scale, long-run​
选项：
A: average total cost is minimized.
B: average total cost is greater than long-run marginal cost.
C: marginal cost is minimized.
D: average total cost is less than long-run marginal cost.
答案: 【 average total cost is less than long-run marginal cost.】

4、单选题：
‍In setting the production level, a firm's cost curves‍
选项：
A: dictate what decisions the firm will make.
B: by themselves do not tell us what decisions the firm will make.
C: have no bearing on what decisions the firm will make.
D: None of the three is correct.
答案: 【 by themselves do not tell us what decisions the firm will make.】

测验

1、单选题：
​If your local gasoline station raised its price by 20 percent, its sales of gasoline would decrease substantially because your local gas station‏
选项：
A: has little or no market power.
B: is small relative to the size of the gasoline market.
C: is a competitive firm.
D: All of the three are correct.
答案: 【 All of the three are correct.】

2、单选题：
‏Suppose a firm in a competitive market reduces its output by 20 percent. As a result, the price of its output is likely to‎
选项：
A: increase.
B: remain unchanged.
C: decrease by less than 20 percent.
D: decrease by more than 20 percent.
答案: 【 remain unchanged.】

3、单选题：
‎A certain competitive firm sells its output for $20 per unit. The 50th unit of output that the firm produces has a marginal cost of $22. Production of the 50th unit of output does not necessarily‍
选项：
A: increase the firm's total revenue by $20.
B: increase the firm's total cost by $22.
C: decrease the firm's profit by $2.
D: increase the firm’s average variable cost by $0.44.
答案: 【 increase the firm’s average variable cost by $0.44.】

4、单选题：
‎When price is below average variable cost, a firm in a competitive market will‍
选项：
A: shut down and incur fixed costs.
B: shut down and incur both variable and fixed costs.
C: continue to operate as long as average revenue exceeds marginal cost.
D: continue to operate as long as average revenue exceeds average fixed cost.
答案: 【 shut down and incur fixed costs.】

测验

1、单选题：

‏The shape of the average total cost curve reveals information about the nature of the barrier to entry that might exist in a monopoly market. Which of the following monopoly types best coincides with the figure?

‏

‏

‏选项：
A: ownership of a key resource by a single firm
B: natural monopoly
C: government-created monopoly
D: a patent or copyright monopoly
答案: 【 natural monopoly】

2、单选题：
‍Which of the following is not a difference between monopolies and perfectly competitive markets?‎
选项：
A: Monopolies can earn profits in the long run while perfectly competitive firms break even.
B: Monopolies charge a price higher than marginal cost while perfectly competitive firms charge a price equal to marginal cost.
C: Monopolies choose to produce the quantity at which marginal revenue equals marginal cost while perfectly competitive firms do not.
D: Monopolies face downward-sloping demand curves while perfectly competitive firms face horizontal demand curves.
答案: 【 Monopolies choose to produce the quantity at which marginal revenue equals marginal cost while perfectly competi