单项选择题

Which of the following errors are caused by leaving a floppy disk in the drive when a computer is powered on?（）

A. Random bluescreen error
B. Inaccessible boot drive
C. Missing NTLDR
D. Invalid boot disk

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单项选择题

A. End user training
B. Antivirus software
C. Group policy
D. Encryption

单项选择题

A. ping -l 9999
B. tracert -d
C. ping -t
D. tracert -h 9999

单项选择题

A. Printers and Faxes Control Panel
B. Services Console
C. My Computer
D. Networking Control Panel