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In Recovery Manager （RMAN）， you have set control file autobackup to ON by using the following command：  CONFIGURE CONTROLFILE AUTOBACKUP ON;  Which two events would cause the control file to be backed up automatically？ （）
A:a tablespace is taken offline
B:the database instance is restarted
C:a new data file is added to an existing tablespace
D:a successful backup is recorded in the RMAN repository
E:the RMAN connection is disconnected from the target database

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出自：Oracle认证

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