单项选择题

People waiting at an airport ______.

A．enjoy hearing airplanes taking off and landing
B．are. usually not troubled by the noise
C．can easily tell sound from noise
D．are often physically affected by the noise

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热门试题

单项选择题

We can conclude from the passage that we need to control noise pollution if ______.

A．we want to stay psychologically and physically healthy
B．we do not want to be physically dent
C．we want to cooperate well
D．we do not want to be anxious

单项选择题

Sound, as defined by the psychologist, ______.

A．can be measured in the same way that noise is measured
B．may be extremely harmful to health
C．is not at all different from noise
D．can be measured by machines