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
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
单项选择题
Linda's stubbornness______ her in relationships with other people and she always turns a deaf ear to everything.
A．affirms
B．clutches
C．deems
D．hinders
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