单项选择题

However many of the considerations which apply to small utility boilers are directly applica ble __________ large industrial boilers.

A．for
B．on
C．to
D．into
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单项选择题
The researchers sought to determine if rest periods would reduce worker __________ and therefore contribute to increased output across the day.
A．damage
B．nightmare
C．fatigue
D．relief
单项选择题
Differences emerge in three ways: argument, competition, and conflict--which alone is __________ wholly harmful.
A．admitted
B．acknowledged
C．absorbed
D．considered
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