单项选择题
A.Dust
B.Power Surge
C.Excessive humidity
D.High temperatures
单项选择题 When running a Windows server, which option is used with the ping command to convert numerical addresses to host names?（）
单项选择题 Whichofthefollowingisabenefitofapplicationvirtualization？（）
单项选择题 Whichswitchshouldbeusedwiththeipconfigcommandifanadministratorwantstotestthe functionalityofaDHCPserver？（）