1. You issued this command RMAN> BACKUP RECOVERY AREA FORCE Which three are true（）?
   A、All Oracle recovery files normally written to the FRA and which have been backed up already to the current FRA are backed up
   B、All files in any previous FRA that have not yet been backed up. are backed up
   C、All Oracle recovery files normally written to the FRA and which have not yet been backed,arebacked up
   D、All Oracle recovery files normally written to the FRA and which have been backed up already to in any previous FRA, are backed up
   E、All files in the current fast recovery area(FRA)that have not yet been backed up, are backed up .
   F、. All files in the current FRA that have been backed up already, are backed up
   G、All files in any previous FRA that have been backed up already, are backed up.
   答案:ACD
   答案:闪回日志不备份，所以all files是错误的

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