油类、电器设备引起的火灾适合用()灭火:
A. 二氧化碳灭火器
B. 干粉灭火器
C. 酸碱灭火器
D. 泡沫灭火器
E. 1211灭火器
By default, which name is used for super user in Linux?
A. admin
B. supervisor
C. root
D. branch
Which command is used to create a new user account?
A. newusr
B. addusr
C. newuser
D. adduser
The su –lcommand will do ___
A. Change the user password to “-l”
B. Disable the user account “l”
C. Disable the user account “-l”
D. Simulate a full login as super user
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