搜题请搜索小程序“爱下问搜题”
问题 单项选择题

所有高于某一特定频率的频率分量都将不能通过系统，而低于此特定频率的频率分量都能通过，那么这种滤波器是（）。

A.带通滤波器

B.带阻滤波器

C.高通滤波器

D.低通滤波器

答案

参考答案：D

单项选择题

One way to judge the performance of a company is to compare it with other companies. This technique, commonly called "benchmarking," permits the manager of a company to discover better industrial practices and can provide a justification for the adoption of good practices.
Any of the following, if true, is a valid reason for benchmarking the performance of a company against companies with which it is not in competition rather than against competitors EXCEPT:（）

A．Comparisons with competitors are most likely to focus on practices that the manager making the comparisons already employs.

B．Getting "inside" information about the unique practices of competitors is particularly difficult.

C．Since companies that compete with each other are likely to have comparable levels of efficiency, only benchmarking against noncompetitors is likely to reveal practices that would aid in beating competitors.

D．Managers are generally more receptive to new ideas that they find outside their own industry.

E．Much of the success of good companies is due to their adoption of practices that take advantage of the special circumstances of their products of markets.
查看答案
单项选择题

甲骨文最早是在哪种物品上发现的？（）

A.青铜器

B.药材

C.墓碑

D.竹筒
查看答案