Auser,Jill,isreportinghermouseismovingwhenJillisnotmovingit,andthecomputerisrunningslowerthannormal.WhichofthefollowingistheFIRSTactionthatKaren,atechnician,shouldtake?（）
A. Runchkdsk.
B. Runanantivirusprogram.
C. Replacethefaultymouse.
D. Removeanyrecentlyaddedhardware.
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统计数据的关联性是指（）。
A. 最低的抽样误差
B. 最小的非抽样误差
C. 满足用户需求
D. 保持时间序列的可比性
Acustomerreportsthaterrormessagesoccasionallyappearandquicklydisappear.WhichofthefollowingistheBESTplaceforatechniciantobegintroubleshootingthisissue?（）
A. RunaSystemRestore
B. CheckDeviceManager
ChecktheEventLogs
D. ChecktheSystemInformation
Which command is a valid way to view the status of an interface？（）
A. >show interfaces fe-0/0/0 extensive
B. >show interfaces fe-0/0/0 status
C. >show interfaces fe-0/0/0 health-info
D. >show interfaces fe-0/0/0 verbose
An internal user has deleted a file named， pagefile.sys and is concerned this deletion may affect the computer. The user should be instructed to：（）
A. reboot the computer because Windows automatically generates a new page file.
B. add a new hard drive， format the drive and install Windows.
C. back up all data， reboot the computer and notify a desktop technician.
D. reformat the hard drive and reinstall Windows.
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