问题
单项选择题
下列选项中属于专利权终止的事由是（）
A.专利权人书面声明放弃专利
B.专利权人不实施专利
C.专利权人延期交纳专利费
D.专利权被宣告无效
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
下列选项中属于专利权终止的事由是（）
A.专利权人书面声明放弃专利
B.专利权人不实施专利
C.专利权人延期交纳专利费
D.专利权被宣告无效
参考答案：A
Passage Three
According to the talk, which of the terms are different from each other
A．Written Arabic and pan-Arabic.
B．Classical Arabic and written Arabic.
C．Modem Arabic and written Arabic
D．Modem Arabic and colloquial Arabic.