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【单选题】
在如图所示的多谐振荡器电路中,若R1=R2=5.1KW,C=0.01mF,Vcc=12V,这电路的振荡频率是:( )A.
5.9KHz
B.
9.3KHz
C.
14KHz
D.
11KHz
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举一反三
【单选题】__ the new technology into the factory was not an easy job.
A.
Introducing
B.
Introduce
C.
Having introduced
D.
To have introduced
【简答题】The water in the river (pollute) ______ since the factory was put into production.
【单选题】The _______ cause of laying off skilled workers in the factory was bad management.
A.
negative
B.
negligible
C.
prevalent
D.
prime
【单选题】Production at the factory was ______ for as long as 10 hours because the electricity supply was cut off.
A.
disturbed
B.
bothered
C.
interrupted
D.
unloaded
【单选题】The workers were made when the factory was restructured.
A.
redundancy
B.
redundant
C.
layoff
D.
lay off
【简答题】The instruction of 'live in the moment' in yoga class is hard to achieve because humans have the memory of the past.
【单选题】After the explosion, the factory was a ______of total confusion.
A.
situation
B.
scene
C.
view
D.
show
【简答题】A. I wouldn't mind watching it. B. A dancer. C. She's not in at the moment. D. It has been broken. E. It's wonderful. F. You'd better do it. G. I've never been there. H. Take it easy. 56. Bob: There's...
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