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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单项选择题

A．entertain and advertiseB．educate and advertiseC．educate and entertainD．be informative and instructive

A．entertain and advertise
B．educate and advertise
C．educate and entertain
D．be informative and instructive

填空题

high-risked—high-risk