【单选题】According to the passage, Japanese firms differ strikingly from American firms in that the former ______.
A.
use subcontractors more extensively
B.
are less flexible in terms of lifetime employment
C.
hold on to the values of society
D.
are more efficient in competition than the latter
【单选题】下列关于计算机软硬件系统描述,其中错误的是( )
B.
计算机系统主要由软件和硬件构成,两者互为依托和补充
D.
计算机的软硬件功能是逻辑等价的,因此某些软硬件模块可以固化或者软化
【判断题】Whether an oligopoly consists of 3 firms or 10 firms, the level of output likely will be the same.()
【单选题】下列关于计算机软硬件系统描述,错误的是( )。
B.
计算机系统主要由软件和硬件构成,两者互为依托;
D.
计算机的软硬件功能是逻辑等价的,因此某些软硬件模块可以固化或者软化;
【单选题】Which of the following is characteristic of oligopoly firms, but not of monopolistically competitive firms?
A.
firms seek to maximize profits
B.
firms face downward-sloping demand curves
C.
the pricing behavior of one firm has a significant effect on the sales of other firms
D.
firms have at least some ability to influence price
【单选题】One difference between oligopoly firms and firms that are monopolistic competitors is that:
A.
the average total cost curves of monopolistic competitors are generally u-shaped, but for oligopoly firms they are not.
B.
monopolistic competitors choose a level of output such that marginal revenue equals marginal cost, but oligopoly firms generally do not.
C.
monopolistic competitors face lower costs on average than do oligopoly firms.
D.
the interdependence among firms is highly significant in oligopoly markets, but not in monopolistically competitive markets.
【判断题】Although firms marketing abroad face many of the same challenges as firms marketing domestically, international environments present added uncertainties which must be accurately interpreted.()
【单选题】如图甲所示,M是一个小型理想变压器,原副线圈匝数之比n 1 :n 2 =10:1,接线柱a,b接上一个正弦交变电源,电压随时间变化规律如图乙所示变压器右侧部分为一火警报警系统原理图,其中R 2 为用半导体热敏材料(电阻随温度升高而减小)制成的传感器,R 1 为一定值电阻。下列说法中正确的是()
B.
当传感器R 2 所在处出现火警时,电压表V的示数减小
C.
当传感器R 2 所在处出现火警时,电流表A的示数减小
D.
当传感器R 2 所在处出现火警时,电阻R 1 的功率变小
【单选题】______more effectively with foreign firms, many Chinese firms have turned to new technology.