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KSGZY型矿用移动变电站低压馈电开关箱内，装有半导体脱扣器和（），对变电站运行中的过载、短路、失压和漏电等故障进行保护。

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论技术目标的来源、内涵、构成和作用

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作业中推动车梯应服从工作台上人员的指挥。

A. 正确
B. 错误

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对年轻一代教育影响，全面地看，是由（）、（）、（）三方面构成的，教育成效往往是这三方面合力的结果。

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In Recovery Manager (RMAN), you are taking image copies of the data files of your production database and rolling them forward at regular intervals. You attempt to restart your database. After a regular maintenance task, you realize that one of the data files that belongs to the USERS tablespace is damaged and you need to recover the data file by using the image copy. Because a media failure caused the data file to be damaged, you want to place the d ata file in a different location while restoring the file. Which option must you consider for this task?（）

A. using only the RMAN SWITCH command to set the new location for the data file
B. placing the database in the MOUNT state for the restore and recovery operations.
C. using an RMAN RUN block with the SET NEWNAME and then the SWITCH command.
D. configuring two channels: one for the restore operation and the other for the recovery operatio

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