皮皮学，免费搜题
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搜题
【单选题】
注射区皮肤消毒，其乙醇浓度应为A.
50％
B.
60％
C.
75％
D.
80％
E.
95％
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反馈参考答案：
举一反三
【判断题】An industry is a natural monopoly when a single firm can supply a good or service to an entire market at a smaller cost than could two or more firms.
A.
正确
B.
错误
【单选题】( ) is a market structure in which firms have market power (the ability to raise price profit- ably above marginal cost) but no additional firm can enter and earn positive profits.
A.
Monopoly
B.
Cartel
C.
Monopolistic competition
D.
Oligopoly
【单选题】When a single firm can produce output over the relevant range of demand more efficiently than two or more firms can, because of the existence of economies of scale, we have:
A.
perfect competition.
B.
monopolistic competition.
C.
diseconomies of scale.
D.
a natural monopoly.
【单选题】A computer software firm has developed a new and better spreadsheet program. The program is protected by copyrights, so the firm can act as a monopolist for this product. The demand function for the s...
A.
50000
B.
12000
C.
14000
D.
25000
【单选题】A computer software firm has developed a new and better spreadsheet program. The program is protected by copyrights, so the firm can act as a monopolist for this product. The demand function for the s...
A.
50000
B.
12000
C.
14000
D.
25000
【单选题】A monopoly firm can sell 150 units of output for $10 per unit. Alternatively, it can sell 151 units of output for $9.95 per unit. The marginal revenue of the 151st unit of output is
A.
$2.45.
B.
$-2.45.
C.
$-0.05.
D.
$9.95.
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