[单选] Which of the following statements is true regarding implementing a Flashback Table recovery？（）

A . An SCN is never used to perform a Flashback Table recovery.
B . If a significant number of changes have been made to the table， row movement must be enabled.
C . The tablespace must be offline before performing a Flashback Table recovery.
D . Flashback Table recovery is completely dependent on the availability of undo data in the undo tablespace.

Which of the following is the lowest cost enterprise class IBM Storage System that can support anExchange 2010 solution?（） DS5100 。 Storwize V7000 。 DS8700 。 XIV system。所用骨料的不同，划分的混凝土类别不包括（）水泥混凝土。矿渣混凝土。碎石混凝土。卵石混凝土。 Your database is running in ARCHIVELOG mode,and the database is open. You execute an RMAN backup and specify the KEEP clause.Which components are backed up when this option is specified?（） only the control file, the current SPFILE, and data files。 only the current SPFILE and data files if autobackup is disabled。 only the data files and the archived redo logs。 the control file, current SPFILE file, data files, and archived redo log。金融机构委托第三方代为履行识别客户身份的，若第三方未能履行识别客户身份义务的，应由谁承担未履行客户身份识别义务的责任？（）第三方承担。金融机构。双方共同承担。双方协商承担。简述双馈异步发电机超同步状态工作模式 Which of the following statements is true regarding implementing a Flashback Table recovery？（）

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[单选] Which of the following statements is true regarding implementing a Flashback Table recovery？ （）

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[单选] Which of the following statements is true regarding implementing a Flashback Table recovery？（）