题目内容

一般不合格品的记录由各部门检验人员或生产部外协员负责保存五年,产品质量产生的严重不合格品的记录,由质量管理部质量主管负责保存二年。

A. 正确
B. 错误

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IEC61850-9-2的电流通道采用()位整数。

A. 8
B. 16
C. 32
D. 64

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Your PROD database has been started using the server parameter file. In your PROD database you are using RMAN for backup and recovery operations. You issue the following commands from the RMAN prompt: RMAN> CONFIGURE CONTROLFILE AUTOBACKUP OFF; RMAN> BACKUP DATABASE; Which files from the database will be backed up as a result of this BACKUP command?()

A. control file
B. all datafiles
C. password file
D. online redo log file
E. archive redo log file
F. server parameter file
G. only the SYSTEM datafile

试述阴极保护法的防腐原理是什么?

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