单项选择题


A．available
B．adaptable
C．recharging
D．approaching
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单项选择题
It can be inferred from the passage that we need to control noise pollution if______.
A．we want to stay both psychologically and physically healthy
B．we don't want to be easy to make angry with others
C．we want to work hard and cooperate well with each other
D．we don't want to suffer from serious anxiety and feel uneasy
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
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