单项选择题
A. The technician plugged a USB 2.0 device into a USB 1.1 port.
B. The technician needs to reboot the computer for the device to work.
C. The technician plugged a USB 1.1 device into a USB 2.0 port.
D. The front panel connectors are not plugged into the motherboard.
单项选择题 Which of the following commands will be run at a command prompt to determine which WindowsOS is running on the computer?（）
单项选择题 An executive’s laptop screen has been damaged and will not power on. Which of the following is the FASTEST way to get the executive back online?（）
单项选择题 A user is reporting that their computer is making strange noises and randomly powers off. Which of the following tools would MOST likely be used to troubleshoot this problem?（）