皮皮学，免费搜题
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【单选题】
动物实验中,短暂夹闭一侧颈总动脉引起
A.
夹闭侧神经传人活动增加
B.
平均动脉压升高
C.
心率减慢、心肌收缩力减弱
D.
心迷走神经的紧张性升高
E.
心交感神经和交感缩血管神经的紧张性降低
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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
查看完整题目与答案
【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
查看完整题目与答案
【判断题】22.渐开线齿轮基圆上压力角为 20 °。
A.
正确
B.
错误
查看完整题目与答案
【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.
查看完整题目与答案
【单选题】当前细胞生物学研究的热门领域是
A.
细胞信号转导
B.
细胞增殖
C.
细胞起源
D.
细胞核的结构
查看完整题目与答案
【多选题】1946年6月23日,在南京下关被国民党殴伤的上海人民团体联合会请愿团成员是 ( )
A.
黄炎培
B.
马叙伦
C.
雷洁琼
D.
谭平山
查看完整题目与答案
【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
查看完整题目与答案
【单选题】下面哪种基准通常用于销售煤，物料平衡、热平衡及热效率计算( )
A.
空气干燥基
B.
干燥无灰基
C.
干燥基
D.
收到基
查看完整题目与答案
【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
查看完整题目与答案
【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.
查看完整题目与答案
相关题目：
【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
查看完整题目与答案
【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
查看完整题目与答案
【判断题】22.渐开线齿轮基圆上压力角为 20 °。
A.
正确
B.
错误
查看完整题目与答案
【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.
查看完整题目与答案
【单选题】当前细胞生物学研究的热门领域是
A.
细胞信号转导
B.
细胞增殖
C.
细胞起源
D.
细胞核的结构
查看完整题目与答案
【多选题】1946年6月23日,在南京下关被国民党殴伤的上海人民团体联合会请愿团成员是 ( )
A.
黄炎培
B.
马叙伦
C.
雷洁琼
D.
谭平山
查看完整题目与答案
【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
查看完整题目与答案
【单选题】下面哪种基准通常用于销售煤，物料平衡、热平衡及热效率计算( )
A.
空气干燥基
B.
干燥无灰基
C.
干燥基
D.
收到基
查看完整题目与答案
【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
查看完整题目与答案
【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.
查看完整题目与答案