单项选择题
A. power cycle the system completely.
B. run an on-demand virus scan.
C. perform a system restore.
D. check the installation event logs
单项选择题 A technician wants to verify a remote printer that has been power cycled is back online. Thetechnician would use which of the following commands and switch?（）
单项选择题 Which of the following is unsafe for a technician to use when troubleshooting or repairing a CRT monitor?（）
单项选择题 Which of the following tools would be BEST to use to pry open the case of a laptop?（）