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The passage is mainly about ______ . [br] Which of the following is true accordi
The passage is mainly about ______ . [br] Which of the following is true accordi
游客
2025-03-25
17
管理
问题
The passage is mainly about ______ . [br] Which of the following is true according to the passage?
选项
A、When a patent becomes out of effect, it can be re-patented or extended if necessary.
B、It is necessary for an inventor to apply for a patent before he makes his invention public.
C、A patent holder must publicize the details of his invention when its legal period is over.
D、One can get all the details of a patented invention from a library attached to the patent office.
答案
C
解析
是非题。根据第二段,一个发明获得专利后,其发明人在一定时期内对它拥有垄断,但当专利到期后,专利拥有者必须将发明的全部细节公之于众。因此B不合本句意思,而C与此符合。在第三段讲,只有在特别例外的情况下,专利的期限才可以延长,故A与此不符。而根据第五段,在图书馆中只可查到已过期的专利的详细资料,所以D也不对。
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