单项选择题

The word "plagiarize'(Line 6, Para 5) most probably means"______".

A．steal and use
B．provide reward to
C．publicize
D．take and change
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单项选择题
From the passage we get the impression that______.
A．an invention will not benefit the inventor unless it is reduced to commercial practice
B．patent experts often recommend patents to others by conducting a search through dead patents
C．an old patent is more expensive than a new one
D．products are actually inventions which were made a long time ago
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