What are three purposes of the RMAN “FROM” clause?（） [" to support PUSH-based active database duplication"," to support synchronization of a standby database with the primary database in a Data environment"," To support PULL-based active database duplication"," To support file restores over the network in a Data Guard environment"," To support file recovery over the network in a Data Guard environment"]
You work as a database administrator at Certkiller .com. Your database is open and running in ARCHIVELOGmode. You take RMANfull backups every Sunday night. On Monday morning， while querying the user1.employeestable， you receive the following error message： 01578： ORACLE data block corrupted （file # 5， block # 51） ORA-01110： data file 5：’/u01/app/oracle/oradata/orcl/example01.dbf’ You need to rectify the corruption while ensuring the following： The data file should remain online. The mean time to recover （MTTR） should be minimal. You are not using a backup control file and all the archived logs are accessible. Which option would you choose？（） [" flash back the corrupted blocks"," use the DBMS_REPAIR package"," use the RMAN TSPITR command"," use the RMAN BLOCKRECOVER command"," use the RESTORE DATABASE and RECOVER DATABASE commands"," investigate the time at which the corruption occurred and perform a point-in-time recovery"]
屏蔽泵在启动前必须（） ["投运循环水彻底排净气直到全部是液体","振运循环水不必彻底排气"]
You are working on an Oracle Database 10g database. You enabled the Flashback Database feature. Which two statements regarding flashback logs are true？ （） [" Flashback logs are not archived."," Flashback logs are maintained in redo log files."," Flashback logs are maintained in the Flash Recovery Area."," Flashback logs are used to maintain Flashback Database related errors."," Flashback logs need to be cleared manually after you disable Flashback Database."]
温度
耐力训练一般为中等强度，即（）最大摄氧量或（）最大心率，每次运动（）分钟左右，每周训练（）以上。
