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Which two statements about Recovery Manager （RMAN） backups are true？ （）
A:Online redo log files can be backed up.
B:Archived redo log files are backed up.
C:Only used data blocks can be backed up as backup sets.
D:Only consistent database backups can be performed.
E:RMAN backup can be taken only if the database is configured in ARCHIVELOG mode.

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出自：Oracle认证

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