单项选择题

It is implied that the solution to noise problem may be______.

A．money-consuming
B．not existing
C．time-consuming
D．better planning
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单项选择题
Noise control demands the following factors except______
A．sense of proportion
B．money and technology
C．conflict of interest
D．self-discipline
单项选择题
According to the first paragraph, noise is______.
A．inseparable from leisure
B．inseparable from by-product
C．inseparable from working hours
D．inseparable from the advance of our life
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