【简答题】What does the underlined sentence mean? A) You should do the things people ask you to do without feeling guilty. B) You shouldn’t do the things people ask you to do if you don’t want to. C) To do thin...
【判断题】在直流电路中,电感元件、电容元件和电阻元件一样起着限流作用。
【单选题】The underlined word 'involved' means______.
A.
have something to do with
D.
complain about his action
【单选题】The underlined word 'volunteer' in paragraph 2 are people ______.
A.
who are forced to do something
B.
who are willing to do something without payment
C.
who are reluctant to do something
D.
who are controlled to do something
【简答题】由 与 、 的关系可知,在直流电路中,电感元件相当于____(开路;短路)状态,电容元件相当于____(开路;短路)状态;在交流电路中,电感元件和电容元件相当于____(电阻;电容)元件,其数值随____(频率;角频率)的不同而不同。
【判断题】PLC 发展的第一阶段是初创阶段。主要用于逻辑运算和定时、计数,它的控制功能比较简单。
【多选题】建设工程招标方法有 [填空(1)] [填空(2)]