皮皮学，免费搜题
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【单选题】
检测不完全抗体可使用的凝集反应是A.
协同凝集反应
B.
间接凝集反应
C.
间接血凝试验
D.
Coombs试验
E.
直接凝集反应
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皮皮学刷刷变学霸
举一反三
【单选题】When an invention is made, the inventor has three possible courses of action open to him: he can give the invention to the whole world by publishing it, keep the idea secret, or patent it. A granted p...
A.
It is necessary for an inventor to apply for a patent before he makes his invention public.
B.
A patent holder must publicize the details of his invention when its legal period is over.
C.
one can get all the details of a patented invention from a library attached to the patent.
D.
When a patent becomes out of effect, it can be re-patented or extended if necessary.
【单选题】When an invention is made, the inventor has three possible courses of action open to him: he can give the invention to the world by publishing it, keep the idea secret, or patent it. A granted patent ...
A.
an approach to patents
B.
the application for patents
C.
the use of patents
D.
the access to patents
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