单项选择题

According to the passage, intense noise pollution may NOT cause ______.

A．hearing loss
B．high blood pressure
C．lost productivity
D．poor appetite
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单项选择题
Generally speaking, a rock concert takes place at about ______.
A．40 decibels
B．90 decibels
C．110 decibels
D．160 decibels
单项选择题
All of the following are solutions employed to prevent noise pollution EXCEPT ______.
A．utilizing insulation and sound proofing devices
B．reducing the sources of noises
C．wearing ear protection
D．planting more trees to absorb the noise
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