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单选题
Which of the following should a technician use to remove dust from the inside of a server case？（）
A
Compressed air
B
Vacuum
C
Soap and water
D
Disinfecting wipes
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单选题Which of the following should a technician MOST likely use to test a RS-232 port?（）A
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单选题Which of the following should a technician use to remove dust from the inside of a server case？（）A
Compressed airB
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Disinfecting wipes
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Cable testerB
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