What do you want? [ ]
A. I want a bike.
B. We want to a bike.
C. I'm want a bike.
答案:A
若关系模式R∈1NF,且对于每一个非平凡的函数依赖X→Y,都有X包含码,则R∈
A.1NF
B.2NF
C.3NF
D.BCNF
男,50岁,1周前心前区剧烈疼痛,随后心悸、气促,怀疑急性心肌梗死。为确诊最有帮助的酶学检查是( )。
A.LDH
B.GOT
C.CPK
D.肌钙蛋白T
E.CPK同工酶