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Examine the following RMAN command: Which two statements are true regarding the backup taken by using the above RMAN command?（）
A:Only data files and the control file are backed up.
B:Archived redo logs are backed up only I f the database is open during the backup.
C:The backup is deleted after one day, regardless of the default retention policy settings.
D:The backup becomes obsolete after one day, regardless of the default retention policy settings.

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出自：Oracle认证

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