题目内容

行政看管是（）的措施。

A. 维护秩序
B. 制止严重违纪行为
C. 预防事故发生
D. 预防案件发生

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直流输电系统的可靠性有哪些主要的指标？

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下列关于多式联运合同说法正确的是（）

A. 多式联运合同只能是客运合同
B. 多式联运合同既可以是客运合同，也可以是货运合同
C. 多式联运合同只能是货运合同
D. 多式联运合同是包含客运合同和货运合同的混合合同

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电气设备检修中更换的零部件，其技术性能不得（）原设计的要求。

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Your database is set in NOARCHIVELOG mode and is backed up every night. There are 10 redo log groups on the database， each with three members， making a total of 30 redo log files. At lunchtime the server unexpectedly gets shut down. Upon restarting you notice that the data file belonging to the SYSTEM tablespace has become corrupted. You also notice that there have been 15 log switches during the day. Which solution should you use to recover as much committed data as possible？（）

A. Restore the data file for the SYSTEM tablespace then open the database.
B. Restore all redo logs form last night's backup, then restart the database.
C. Perform a complete restore of all files from last night's backup. Data entered into the database today must be reentered.
D. Mount the instance, take the SYSTEM tablespace offline, open the database, and then restore the data file, recover it, and bring the tablespace online.&e

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行政看管是（）的措施。

A. 维护秩序 B. 制止严重违纪行为 C. 预防事故发生 D. 预防案件发生

直流输电系统的可靠性有哪些主要的指标？

下列关于多式联运合同说法正确的是（）

电气设备检修中更换的零部件，其技术性能不得（）原设计的要求。

A. 维护秩序
B. 制止严重违纪行为
C. 预防事故发生
D. 预防案件发生