题目内容

管道的螺纹连接,当介质的温度大于120摄氏度时,填料应选用聚四氟乙烯生料带。()

A. 正确
B. 错误

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储集层的非均质性将()影响到储层中油、气、水的分布规律和油田开发效果的好坏。

A. 间接
B. 直接
C. 严重
D. 可能

You issue the following RMAN command to set a retention policy on a database: RMAN>CONFIGURE RETENTION POLICY TO REDUNDANCY 2; What will be the outcome of issuing this command?()

After two days,a backup will be marked obsolete
B. After two days,a backup will be deleted from the media
C. If the RMAN repository has records of two or more recent backups of a file,then older backups will be deleted from the media.
D. If the RMAN repository has records of two or more recent backups of a file then older backups will be marked obsolete.

在SQL Server2008中,存储过程是一组预先定义并()的T_SQL语句。

A. 保存
B. 编译
C. 解释
D. 编写

原子荧光法测定水中砷、锑时,一般要在水样中加入硫脲和抗坏血酸,其作用是什么?

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