单项选择题
A user suspects that a recently installed program overwrote a Windows system file on the computer. Which of the following commands could be run to check and verify the system files？（）
A.system /v B.winnt /s C.sfc /scannow D.chkdsk /f
单项选择题 Whichofthefollowingcommandsareusedtocreatefoldersinacommandprompt？（）
多项选择题 WhichofthefollowingdescribeshowtosettheRead-onlyattributeonafolder？（）
多项选择题 AcompanymayusetheWindowsXPProfessionalMUIPackbecausethecompany：（）
