题目内容

铃流及信号音是光端机向用户设备发出的振铃。

A. 正确
B. 错误

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外资企业将其财产或者权益对外抵押、转让,须经审批机关批准,并向工商行政管理机关办理变更登记手续。()

A. 正确
B. 错误

Which of the following represents the correct way to perform an online recovery of datafile 4, which is assigned to a tablespace called USERS?()

A. shutdown restore datafile 4; recover datafile 4; alter database open;
B. Sql alter database datafile 4 offline; restore datafile 4; recover datafile 4; alter database open;
C. Sql alter database datafile 4 offline; restore datafile 4; Sql alter database datafile 4 online;
D. Sql alter database datafile 4 offline; restore database datafile 4; recover database datafile 4;Sql alter database datafile 4 online;
E. Sql alter database datafile 4 offline; restore datafile 4; recover datafile 4; Sql alter database datafile 4 online;

铁路局应定期组织有关部门检查客车防火工作,消除火灾隐患,确保客车安全。车辆段要加强燃煤锅炉、茶炉、()、电器设备及发电车的检修。

电压开关型浪涌保护器

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