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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.

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出自：Oracle认证

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