题目内容

限速运行时，发站应在货物运单、票据封套、编组顺序表及货车表示牌上注明“限速XX公里”字样。

A. 正确
B. 错误

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

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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