（多选题）
What are the two advantages of RMAN Block Media Recovery （BMR） over file/x7flevel recovery？（）
ABMR lowers the mean time to recover （MTTR）.
BBMR supports pointintime recovery of individual data blocks.
CBMR enables you to use incremental backups for block recovery.
DBMR enables recovery even when the database is not mounted or open.
EBMR enables you to use proxy backups to perform block media recovery.
FBMR enables increased availability of data during recovery because the data file that requires a recovery can remain online.
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