【判断题】【消耗次数：1】
晶体三极管具有能量放大作用。
①
正确
②
错误
参考答案：
复制
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相关题目
【单选题】
对三极管放大作用的实质，下面说法正确的是
①
三极管可以把小能量放大成大能量
②
三极管可以把小电流放大成大电流
③
三极管可以把小电压放大成大电压
④
三极管可用较小的电流控制较大的电流
【单选题】
下列是三极管各个极的电位，处于放大状态的三极管为
①
VB=0.7V VE=0V VC=0.3V
②
VB=-6.7V VE=-7.4V VC=-4V
③
VB=-3V VE=0V VC=6V
随机题目
【单选题】
7. She is poor ______ she can hardly get anything to eat.
①
as much as
②
too much so that
③
so much so that
④
much more than
【单选题】
Of swimming and football he much preferred _____.
①
later
②
the later
③
former
④
the former
【单选题】
10. ______ radio ______ and try to find out what’s wrong with it.
①
Take…apart
②
Tell…apart
③
Cutting…into pieces
④
Separate…apart
【单选题】
3.Many American people lost their jobs in the economic_________of 1929.
①
emergency
②
crisis
③
time
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stage
【单选题】
Many people complain of the rapid _____ of modern life.
①
rate
②
speed
③
pace
④
growth
【单选题】
_____his sister, Jack is quiet and does not easily make friends with others.
①
Dislike
②
Unlike
③
Alik
④
Liking
【单选题】
The assistant wrapped it _____ for her as quickly as possible.
①
round
②
about
③
in
④
up
【单选题】
1.If my memory serves me, there was a_________hill near your hometown.
①
bare
②
empty
③
empty
④
nude
【单选题】
6. He is now___________the company.
①
in doubt
②
in possession of
③
in a hurry
④
in a sense