单项选择题

According to the passage, people ______.

A．can net work in a noisy situation
B．will suffer from complete deafness because of noise pollution
C．can be psychologically affected by working in very noisy factories
D．may cooperate well in a noisy surrounding

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热门试题

单项选择题

The intensity of noise can be measured by ______.

A．its effect on people's hearing
B．its decibel
C．how much it affects people psychologically
D．how long it lasts

单项选择题

Sound , as defined by the psychologists,

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