Which three activities are supported by the Data Recovery Advisor?（） Advising on block checksum failures。 Advising on inaccessible control files。 Advising on inaccessible block change tracking files。 Advising on empty password files。 Advising on invalid block header field value。
个体心理健康最重要的标志之一是对自我的接受和认可，即有成熟的自我意识和健康的自我形象。（）
What are the two advantages of RMAN Block Media Recovery （BMR） over file-level recovery？（） BMR lowers the mean time to recover （MTTR）.。 BMR supports point-in-time recovery of individual data blocks.。 BMR enables you to use incremental backups for block recovery.。 BMR enables recovery even when the database is not mounted or open.。 BMR enables you to use proxy backups to perform block media recovery.。 BMR enables increased availability of data during recovery because the data file requires a recovery can remain online.。
IT服务管理是指（） IT的基础设施管理。 IT的运行维护管理。 IT的技术管理。 管理IT服务满足业务需求。
Examine the following scenario： The target database instance is running. The most recent backup available for the target database was taken two days ago. Log files switches have occurred in last two days. The target database is duplicated on the same host， using the Recovery Manager （RMAN） duplicate command as follows： RMAN> RUN { ALLOCATE AUXILIARY CHANNEL aux 1 DEVICE TYPE DISK； DUPLICATE TARGET DATABASE TO auxdb； } Which statement is true about the duplicate database in this scenario？（） It contains data till the last backup。 It contains all data from target database until the current time。 It contains all data from only the committed transactions in the target database。 It contains all data except that which is used by the transactions in the current online redo file of target database。
能够正确反映战国时期封建生产关系形成的历史现象是（）。
