【单选题】听力原文:M: Good morning, George. You're looking a bit under the weather W: I'm feeling pretty awful actually. I'm afraid I've got a cold coming. What can you learn from the conversation?
A.
The man is afraid of the cold weather.
B.
A cold weather is what the man is looking for.
C.
A cold weather is coming.
D.
The man has caught a cold.
【单选题】水轮发电机过电压保护的整定值一般为( )。
A.
动作电压为1.5倍额定电压,动作延时取0.5s
C.
动作电压为1.8倍额定电压,动作延时取0.3s
【简答题】由ω与X L 、X C 的关系可知,在直流电路中,电感元件相当于______状态,电容元件相当于______状态;在交流电路中,电感元件和电容元件相当于______元件,其数值随______的不同而不同。
【单选题】水轮发电机过电压保护的电压整定值一般为()Un。
【判断题】对于直流电路,电感元件相当于开路,电容元件相当于短路
【单选题】She is under the delusion that I'm going to give her a lot of money.
【单选题】水轮发电机过电压保护的整定值一般为( )。
A.
动作电压为1.5倍额定电压,动作延时取0.5s
C.
动作电压为1.8倍额定电压,动作延时取0.3s
【判断题】在文化理论中,有一种理论是表演理论,它认为任何一个文化现象都是一个表演的过程,这个过程没了,文化现象就没有了。()
【单选题】In the M.Emooring trial, the starting trial is carried under ____.
D.
the surveyors supervision