单项选择题

In this factory the machines are not regulated______but are jointly controlled by. a central computer system.

A．independently
B．individually
C．irrespectively
D．irregularly
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单项选择题
He has failed me so many times that I no longer place any______on what he promises.
A．faith
B．belief
C．credit
D．reliance
单项选择题
Every chemical change either results from energy being used to produce the change, or causes energy to be______in some form.
A．given off
B．put out
C．set off
D．used up
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