单项选择题

One advantage of a non-union business is being able to deal directly with

A．shop stewards.
B．agents.
C．employees.
D．trade officials.
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单项选择题
A
单项选择题
What has this report to say about the effectiveness of sound absorbents
A．Such absorbents as glass wool is the best way of diminishing noise.
B．Lining a wall with absorbent will reduce the noise level considerably.
C．Covering the surfaces of a factory building with absorbent is ineffective in control noise.
D．Screening partially noisy machines will eliminate noise.
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