单项选择题
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.
D. the customer they have an appointment with in an hour.
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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
B. The power supply needs to be replaced with one rated for 110 watts
C. The power supply needs a power inverter to handle the change in cycles
D. The power supply voltage needs to be switched to 110 from 220 -
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Which of the following commands can be used to verify the gateway IP address on a localcomputer?（）
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B. telnet
C. ping
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