题目内容

柱塞泵根据柱塞分布形式不同有（）和（）两种。

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You discover that the ms db database on a SQL Server 2005 computer is corrupt and must be restored. Databases are backed up daily. The database backup files are written to a network share， but the file names do not clearly indicate which databases are in each file. You need to locate the correct backup file as quickly as possible. The first file in the list isnamed DB Backup.bak. Which Transact-SQL statement should you use？（）

A. RESTORE LABELONLYFROM DISK = N\\Server1\Backup\DB Backup.bak
B. RESTORE HEADERONLYFROM DISK = N\\Server1\Backup\DB Backup.bak
C. RESTORE VERIFYONLYFROM DISK = N\\Server1\Backup\DB Backup.bak
D. RESTORE DATABASE MSDBFROM DISK =N\\Server1\Backup\DB Backup.bak

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关于智能变电站中交换机及过程层网络的流量控制，下述说法正确的是（）。

A. VLAN属于一种静态配置
B. VLAN宜按照间隔划分
C. GMRP是一种动态组播的实现方式
D. 静态组播技术需通过人工对各个交换网口设置其所需接收的组播地址

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任务池中的任务，可否多次添加？

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施肥技术要点

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