单项选择题

It can be inferred from the passage that ______.

A．all the ideas "new" to us are actually old
B．some "new" ideas can make money without having to be commercialized
C．all "new" ideas first appeared in the form of a patent
D．some "new" ideas may not bring economic reward to their originators

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热门试题

单项选择题

Which of the following does NOT characterize a normal patent

A．some extension of life span
B．some duration of validity
C．some form of reward
D．some kind of monopoly

单项选择题

From the passage we might get the hint that ______.

A．the future television will have advanced transmission techniques
B．there will be more types of television
C．the future television will be more entertaining
D．the future television will be more interactive