单选题
AThe data file cannot be recovered.
BThe date file can be restored from the SYSTEM auto backup.
CTake thetablespaceoffline，drop，kand re-create it.
DRecovery Manager （RMAN） is used to recover the data file.
EThe ALTER DATABSE CREATE DATAFILE..commandis used to recover the data file.
正确答案
答案解析
略
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