单项选择题
Which of the following types of printers uses a fuser to print a document?（）
A. Thermal
B. Laser
C. Inkjet
D. Dot Matrix
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The most important customer a technician has is:（）
A. the customer standing right in front of them.
B. the customer who owes the company the most money.
C. the customer calling on the phone.
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单项选择题
A military member has just returned to the United States from Europe and reports their personaldesktop computer does not work. Which of the following is the MOST logical solution to thisproblem?（）
A. The computer is unable to work in the US because of EU licensing arrangements
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Which of the following uses pair authentication to provide a wireless connection between twodevices?（）
A. 802.11n
B. Bluetooth
C. Infrared
D. Cellular
