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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单项选择题
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
D. Power supply
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