单项选择题
A technician dropped a screw in the case of a desktop computer. Which of the following toolsshould be used to retrieve the screws?（）
A. Computer vacuum B. Plastic tweezers C. Canned air D. Screwdriver with magnetized tip
单项选择题 Which of the following is an advantage that a USB mouse has over a PS/2 mouse?（）
单项选择题 Which of the following will help dissipate heat through the heat sink when upgrading a CPU? （）
单项选择题 Which of the following printers requires a specialized paper in order to operate?（）
