单项选择题
A companys computers are running Windows XP Professional. Some of the desktop computers have the file ntbootdd.sys on the root but it is not seen on any laptops. The ntbootdd.sys file is required for：（）
A.desktops with certain chipsets. B.compatibility with some Windows NT4 applications. C.computers with scanners. D.for SCSI devices.
多项选择题 WhichofthefollowingwouldbetheBESTsafetymeasuretotakebeforeinstallingaWindowsservicepack？（）
单项选择题 WhichofthefollowingcommandscouldbeusedtostarttheManagementConsoleonaworkstationrunningWindows2000/XP？（）
单项选择题 WhichofthefollowinglocationscontainstheSystemRestoreoptioninWindowsXP？（）
