单项选择题

The author of the passage is primarily concerned with ______.

A．summarizing a thesis
B．recommending a different approach
C．comparing points of view
D．making a series of predictions
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单项选择题
In the passage, the author includes all of the following EXCEPT ______.
A．a business principle
B．a definition of productivity ....
C．an example of a successful company
D．an illustration of a process technology
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