礼节是礼貌的（）方式。
A user is unable to determine the default system text editor. How can the local administrator assist the user by identifying the default text editor for the system？（）
A、Login as the user and run ’echo $ENV’.
B、Login as root and run the ’env’ command.
C、Login as root and ’cat /etc/environment’.
D、Login as the user and run the ’env’ command.
Which of the following technologies allows an administrator to submit traffic to an IDS for review?（）
A、Spanning tree
B、VLAN
C、PoE
D、Port mirroring
在word2010中，删除插入点后的字符所使用的命令键是（）
A、Delete
B、Backspace
C、Ctrl+Delete
D、Ctrl+Backspace
有如下程序：运行时的输出结果是（ ）。
A、1234
B、2134
C、12
D、21
An administrator is moving a volume group from one server to another. The disks will be physically moved between the two systems. Which two operations are required on the volume group prior to the physical disk switch?（）
A、'varyoffvg' and 'exportvg'
B、'varyofflv' and 'importvg'
C、'varyofflv' and 'migratepv'
D、'varyoffvg' and 'migratevg'