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
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Which of the following is an advantage that a USB mouse has over a PS/2 mouse?（）
A. A USB mouse uses less power
B. A USB mouse is more portable
C. A USB mouse is hot swappable
D. A USB mouse is more secure -
单项选择题
Which of the following will help dissipate heat through the heat sink when upgrading a CPU? （）
A. Case fan
B. Thermal compound
C. Motherboard riser
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Which of the following printers requires a specialized paper in order to operate?（）
A.Thermal
B.Laser
C.Inkjet
D.Impact
