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【单选题】
I expect them _______ and I wish all the rooms _____________.A.
to come; to clean
B.
come; to clean
C.
to come; to be cleaned
D.
come; to be cleaned
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举一反三
【单选题】The main theme of the talk is about
A.
noise-control technology.
B.
noise in factories.
C.
noise-control regulations.
D.
noise-related effects.
【单选题】Not until midnight ______.
A.
did the noise stop
B.
the noise stopped
C.
the noise did stop
D.
stopped the noise
【多选题】Noise is a term used for factors that interfere with the exchange of messages, including. Noise is inevitable
A.
external noise
B.
physiological noise
C.
psychological noise
D.
semantic noise
【简答题】It must have rained in the night for when l woke up the next morning I saw the grass wet． B)昨晚可能下了雨，因为我早晨醒来时发现草地是湿的。 C)昨晚可能下雨了，因为我被叫醒时发现草地是湿的。 D)昨晚肯定下雨了，因为我早晨醒来时发现草地是湿的。
【单选题】When the Fourier spectrum of noise is constant, the noise is called ( )
A.
Rayleigh Noise
B.
white noise
C.
Exponential Noise
D.
Salt-and-Pepper Noise
【简答题】A．Noise-control technology. B．Noise in factories. C．Noise-control regulations. D．Noise-related effects.
【单选题】This morning I saw an old friend of mine in the street by ______.
A.
event
B.
accident
C.
affair
D.
matter
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