单项选择题

"A dead patent" is one that _________ .

A．no longer wins money
B．has expired
C．is plagiarized
D．is violated
<上一题 目录 下一题>
热门 试题

单项选择题
An inventor can generally make a big profit if he _________ his or her invention.
A．publishes
B．keeps secret
C．patents
D．sells
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
相关试题