单项选择题
By default， what is Driver Signing set to in Windows XP？（）
A.Ignore B.Warn C.Block D.Not installed
单项选择题 Inwhichsituation（s）willWindowsXPadvisethetechnicianinstallingadevicethatthedriverissignedornot？（）
单项选择题 HowistheDiskDefragmentationutilityinWindowsXPaccessed？（）
多项选择题 Windows98SEallowsupgradestowhichofthefollowingoperatingsystems？（）
