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【单选题】
专利权人欲放弃其专利权，那么，根据我国专利法规定，专利权人可以( )A.
提出放弃专利权的声明，由专利局登记和公告
B.
提出放弃专利权的书面声明，由专利局登记和公告
C.
提出放弃专利权的口头声明，由专利局登记和公告
D.
提出放弃专利权的书面声明，由专利局批准并公告
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举一反三
【单选题】The isolation period of children with measles without complications is
A.
isolation until 5 days after eruption
B.
isolation until 10 days after eruption
C.
isolation until 5 days after rash
D.
isolation until 10 days after rash
E.
isolation until 14 days after rash
【单选题】Many paintings of the American Southwest convey a feeling of isolation and loneliness that mirrors the______landscape they depict.
A.
plentiful
B.
sprawling
C.
desolate
D.
important
【单选题】No country can prosper in isolation or meet all challenges on its own. ( )
A.
in isolation
B.
on its own
C.
in isolation...on its own
【单选题】The research at the University of Wisconsin is mentioned to show ______.
A.
the isolation of stem cells
B.
the effects of gene therapies
C.
the advantages of human cloning
D.
the limitations of tissue replacements
【单选题】Isolation is the biggest difficulty for HIV-positive women. 查看材料
A.
Right
B.
Wrong
C.
Not mentioned
【单选题】all of the following are examples of prezygotic isolation mechanisms except
A.
ecological isolation
B.
hybrid sterility
C.
behavioral isolation
D.
temporal isolation
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