单项选择题
A.User Account Control （UAC）.
B.Windows Sidebar.
C.Windows Defender.
D.Aero Interface.
单项选择题 WhichofthefollowingistheBESTsolutionforrepairingaharddrivethatresultsintheCouldnotreadfromselectedbootdiskdisplayuponbooting？（）
单项选择题 InwhichofthefollowingscenarioswouldMACfilteringbeMOSTeffectiveasapartofwirelesssecurity？（）
单项选择题 AtechniciancannotconnectusingRemoteDesktop.Whichofthefollowingportsneedstobeallowedinthefirewall？（）