单项选择题
A. Clean the toner cartridge.
B. Change the paper.
C. Replace the fuser.
D. Print a test page.
单项选择题 A technician receives a boot error message OS not found. Which of the following should thetechnician check? （）
单项选择题 Which of the following features is only available with the Windows XP Professional version ascompared to the Windows XP Home version? （）
单项选择题 The BEST information to document when changing the refresh rate on the display is to include: （）