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A. The alert log file is corrupted.
B. A tablespace is accidentally dropped.
C. One of the redo log members is corrupted.
D. A database user terminates the session abnormally.
E.The hard disk on which the data file is stored is corrupted.
答案:(B、E)
解析:
注意题目说的是什么时候需要进行恢复操作
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