单项选择题

What is the passage mainly about

A．The random fluctuation.
B．The function of feedback.
C．The transformation process.
D．The investment in all forms in the production.
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单项选择题
It can be inferred from the passage that random fluctuation __________.
A．is good to the desired transformation
B．will affect the quality of the goods produced
C．can provide information for the managers as feedback
D．does not help to provide enough information for the managers
单项选择题
...nor does giving people breakfast improve performance meads __________.
A．anyone without breakfast does improve his performance
B．not giving people breakfast improve performance
C．having breakfast does not improve performance, either
D．people having breakfast do improve their performances, too
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