用点拖将一个文件从当前位置复制到另一个硬盘上的正确方法是（）。
A、按住Tab键用鼠标左键拖放
B、直接用鼠标左键拖放
C、按住Alt键用鼠标左键拖放
D、按住Shift键用鼠标左键拖放
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A project requires a new server to be set up with the ability to automatically fail over its Ethernet connection to a second connection if a network failure occurs. Which of the following provides greatest resiliency？（）
A、Two switch ports will be needed on a switch， two Ethernet cables will be needed for the server each connecting to two different Ethernet cards， and one IP address will be needed.
B、Two switch ports will be needed on two different switches， two Ethernet cables will be needed for the server each connecting to two different Ethernet cards， and one IP address will be needed.
C、Two switch ports will be needed on two different switches， two Ethernet cables will be needed for the server each connecting to two different Ethernet cards， two different IP addresses will be needed.
D、One switch port will be needed on one switch， a splitter will be needed to split the connection， two ethernet cables will be needed for the server each connecting to two different Ethernet cards， and two different IP addresses will be needed.
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A previously functional， scheduled snapshot operation against a JFS2 filesystem has failed. The JFS2 filesystem is mounted and appears intact. What is the most likely cause of the failure and how should it be resolved？（）
A、The associated JFS2 log device has failed. Check the log device and varyon the device.
B、The logical volume that hosts the snapshots is full. Increase the size of the logical volume.
C、Fifteen snapshots already exist for the given JFS2 filesystem. Delete at least one existingsnapshot.
D、The volume group that hosts both the snapshots and JFS2 filesystem has lost quorum. Check and correct the integrity of the volume group.
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数据通信中，用户线路有两种形式，即（）和市话线路加装调制解调器构成的信道。
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在搜索文件/文件夹时，若用户选择通配符*.txt，其含义为（）。
A、选中所有的文件
B、选中所有文本文件
C、选中所有主文件名为txt的任意文件
D、选中所有主文件名含有*的文本文件
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文件夹的图标不可更改。
A、对
B、错