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【多选题】
下列哪些发明属于可以授予专利权的主题？（）
A.
一种在核反应堆中生产放射性同位素的方法
B.
一种为生产同位素专门设计的反应堆
C.
一种利用反应堆生产的放射性同位素
D.
放射性同位素的一种新用途
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参考解析：
刷刷题刷刷变学霸
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【单选题】The old idea that child prodigies(神童)'burn themselves' or 'overtax their brains' in the early years, therefore, are prey to failure and (at worst)mental illness is just a myth．As a matter of fact, the...
A.
how many gifted children turned successful when they grew up.
B.
that bright children were unlikely to physically and mentally healthy.
C.
that gifted children were most likely to become bright grown-ups.
D.
that when the bright children grew up, they would become ordinary.
【单选题】王某和刘某就王某所享有的一项专利权的转让订立了书面合同，该专利权转让何时生效( )
A.
合同签订时生效
B.
当事人意思表示一致时生效
C.
经国务院专利行政部门登记和公告后方能生效
D.
刘某实际掌握该项专利权时生效