问题
单项选择题
Consider a relation R ( A，B，C，D ) with the following dependencies： AB C, CD E, DE B.
A． AB
B． ABC
C． ABD
D． ABE
答案
参考答案：C
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Consider a relation R ( A，B，C，D ) with the following dependencies： AB C, CD E, DE B.
A． AB
B． ABC
C． ABD
D． ABE
参考答案：C