Which of the following is not an advantage of block media recovery （BMR）？（）

A、 Reduced MTTR.

B、 Datafiles remain offline while corrupt blocks are repaired.

C、 Datafiles remain online while corrupt blocks are repaired.

D、 A and C

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  E、 The job will immediately take priority over all running jobs.

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  B、It makes the statistics information available to GATHER_STATS_JOB

  C、It initiates the statistics collection process by running GATHER_STATS_JOB

  D、It logs a warning message in the alert log so that the DBA can perform statistics collection manually.

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  B

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  C

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  D

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• 任何个人和组织有权对危害网络安全的行为进行（）。

  A、对抗

  B、破坏

  C、举报

  D、攻击

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