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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A. A USB mouse uses less power
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C. A USB mouse is hot swappable
D. A USB mouse is more secure -
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A. Case fan
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A.Thermal
B.Laser
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