单项选择题
A. A faulty memory module in the printer.
B. A postscript print job has been sent to the printer.
C. A large print job has been sent to the printer.
D. The printer firmware needs to be updated.
单项选择题 Which of the following should the technician do FIRST when removing a paper jam?（）
单项选择题 Which of the following will MOST likely happen if a laser printer displays ‘15% fuser remaining’?（）
单项选择题 Two users share the same Windows 7 computer. The first user creates a document intended to be used by both users, and then logs off. The second user logs on and types the name of the document in the Start menu, but the document is not found. Which of the following is the problem?（）