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Which statement about using RMAN stored scripts is true？（）  
A: To create and execute an RMAN stored script，you must use a recovery catalog.
B: When executing a stored script and a command fails，the remainder of the script is executed，and a message is written to the alert log file.
C: RMAN stored scripts can always be executed against any target database that is registered in the recovery catalog.
D: When you execute a stored script，it always executes using the persistent channel settings previously set with the CONFIGURE command.

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出自：Oracle认证

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