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Which two statements regarding compressed backups in Recovery Manager （RMAN） are true？（）
A: Backup compression is disabled by default.
B: Backup compression can be used with both backup sets and image copies.
C: Backup compression cannot be enabled using the CONFIGURE command.
D: Backup compression works only if the COMPATIBILITY parameter is set to 9.0.0.0 or higher.
E: Backup compression applies to only backup sets.
F: Backup compression applies to only image copies.

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出自：Oracle认证

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