单项选择题

The author develops her argument by ______.

A．exemplification
B．comparison and contrast
C．hypothesis-testing
D．refuting an opposing view
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单项选择题
The idea of manufacturing seems to cover all the following EXCEPT ______.
A．research and development
B．government-run technology centers
C．time needed to go from research to production
D．machine tool accuracy and repeatability
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