题目内容

中石化和胜利油田的安全理念

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什么是直接经验和间接经验？两者的关系如何？

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因病或其他特殊原因不能按期参加考试者须办理（）。

A. 重考
B. 重修
C. 缓考
D. 补考

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已注册电话银行客户可以对资料进行修改，但（）内容不能修改。

A. 客户号
B. 证件类型
C. 证件号码
D. 以上全部

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You performed the RMAN database backup having a backupset key number 231 with the KEEP FOREVER option. After some days， you want to change the status of the database backup and you issued the following command： RMAN>CHANGE BACKUPSET 231 NOKEEP； What is the implication of this command？（）

A. The backup is deleted.
B. The backup is marked unavailable.
C. The backup overrides the backup retention policy.
D. the backup becomes eligible for deletion according to the existing retention policy.

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