问题
单项选择题
设有如下关系模式：R(A,B,C,D,E)，其中R上函数依赖集为：F={(A，B)→E,E→C,C→。则在函数依赖的范围内该关系模式最高属于
A．1NF
B．2NP
C．3NF
D．BCNF
答案
参考答案：B
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设有如下关系模式：R(A,B,C,D,E)，其中R上函数依赖集为：F={(A，B)→E,E→C,C→。则在函数依赖的范围内该关系模式最高属于
A．1NF
B．2NP
C．3NF
D．BCNF
参考答案：B
Which of the following statements is NOT true of "fractional ownership"
A．"Fractional ownership" allows people share the use of highly expensive commodities.
B．Thanks to "fractional ownership", people can afford luxuries like a super yacht.
C．"Fractional ownership" is identical to "time sharing".
D．"Fractional ownership" means part of the property right to the buyer.