单项选择题

According to the acoustics, continual exposure ______ noise of high intensity would lead to loss of hearing.

A．of
B．with
C．to
D．by
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单项选择题
Operations which left patients ______ and in need of long periods of discovery time now leave them feeling relaxed and comfortable.
A．exhausted
B．unhealthy
C．upset
D．fearful
单项选择题
Some companies have introduced flexible working time with less emphasis on pressure ______.
A．than more on efficiency
B．and more on efficiency
C．and more efficiency
D．than efficiency
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