第十三章测试1.In a perfectly competitive industry, the demand curve for the total output of the industry may be downward sloping.
A:错 B:对
答案:B
2.A profit maximizing firm continues to operate even though it is losing money. It sells its product at a price of $100. From these facts we deduce that:
A:average fixed cost is less than $100. B:average total cost is less than $100. C:marginal cost is increasing. D:average variable cost is less than $100. 3.The change in producer's surplus when the market price changes from p1 to p2 is half of the area to the left of the marginal cost curve between p1 and p2.
A:错 B:对 4.A firm has the long run cost function C(q)=4q2 + 4. In the long run, it will supply a positive amount of output, so long as the price is greater than:
A:8 B:4 C:24 D:16 5.Suppose that Dent Carr's long run total cost of repairing s cars per week is c(s)=3s2 + 27.If the price he receives for repairing a car is 30, then in the long run, how many cars will he fix perweek if he maximizes profits?
A:0 B:10 C:7.5 D:5 6.
A:260 B:63 C:126 D:252 7.
A:
B:
C:
D:
8.For a perfectly competitive firm operating at the profit-maximizing output level in the short run, its marginal cost equals market priceA:对 B:错 9.
A:32 B:16 C:72 D:64
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