单项选择题

A．By copying each other’s technology.
B．By incorporating features that make their products distinctive.
C．By making their computers more expensive.
D．By making their computers run much faster.
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单项选择题
A．He knows the answer.B．He is not quite sure.C．He refuses to answer the question.D．He hasn’t watched the movie.
A．He knows the answer.
B．He is not quite sure.
C．He refuses to answer the question.
D．He hasn’t watched the movie.
填空题
D
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