单项选择题

The passage is mainly about______.
A) how patents are applied C) the usage of patents
B) an approach to patents D) the access to patents

A．The passage is mainly about______.
B．how patents are applied
C．an approach to patents
D．the usage of patents
E．the access to patents
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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
单项选择题
The word plagiarize'(Line 6, Para 5) most probably means ______ . A) steal and use C) provide reward to B) publicize D) take and change
A．The word "plagiarize'(Line 6, Para 5) most probably means"______".
B．steal and use
C．publicize
D．provide reward to
E．take and change
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