题目内容

“公告牌”排行榜是由很多榜单组成的,主要按音乐类型划分榜单。

A. 正确
B. 错误

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天津的许多相应风俗与华北农村习俗相近,它体现着社交游乐的功能,也体现天津民俗的亲缘性和兼容性。

A. 正确
B. 错误

You used the IMMEDIATE option to shut down your database instance. Consider the steps that mayoccur when a database instance is started and database is opened: 1:SGA is allocated. 2:Control file is read. 3:Redo log files are opened. 4:Instance recovery is started. 5:Background processes are started. 6:Data file headers are checked for consistency. 7:Server parameter file or the initialization parameter file is read. Which option has the correct order in which these steps occur()

A. 7,1,5,2,3,6,4
B. 1,5,7,2,3,6;step 4 is not required
C. 7,1,5,2,3,6;step 4 is not required
D. 1,2,3,5,6,4;step 7 is not required

提升机工作照明的开关,应与主电源开关相互独立,当提升机主电源被切断时,工作照明不应断电,各自的开关应有明显标志。

A. 正确
B. 错误

简答冷油泵壳体口环与叶轮口环间隙?

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