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The RVPC user can do which of the following？（）
A: Register databases if granted the register database privilege
B: See all databases in the recovery-catalog schema
C: See all database-related metadata in the recovery catalog if they are granted access to that database
D: Unregister databases from the RVPC catalog that were not granted to the RVPC catalog owner with  the grant command
E: Not be connected to with the RMAN command-line catalog parameter for backup or recovery purposes

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出自：Oracle认证

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