未分类题

A．1 1
B．1 *
C．* *
D．* 1

A.1
B.1
C.*
D.*

【参考答案】

D
解析：本题考查数据库系统中ER模型方面的基础知识。依题意，职工EMP关系中一个职工只能担任一个职务，并属于一......

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No one appreciated his work during his lifetime, but （） it is clear that he was a great artist.

A．in the aftermath
B．by the time
C．in retrospect
D．in this eventuality

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