单项选择题
A. Restart the print job in the print queue.
B. Print a test page from the printer properties.
C. Run the Add Printer Wizard.
D. Restart the print spooler service.
单项选择题 After visiting the Windows Update website on a Windows 2000 computer and installing all updates, a user reports that they are unable to select any resolution above 640X480 with sixteen colors. Which of the following procedures should the technician complete FIRST?（）
单项选择题 When troubleshooting an 802.11g network. Which of the following can interfere with the network?（）
单项选择题 A technician is troubleshooting a monitor displaying a blank screen and the power indicator light ison. Which of the following should the technician do next?（）