单项选择题
Which of the following tools is BEST used to measure voltage and amperage from a power source?（）
A. Loopback Plug
B. Multimeter
C. Power Supply Tester
D. Extension Magnet
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A user states that the laser printer is leaving a black line on all pages being printed. Which of thefollowing is the MOST likely cause and solution for this issue?（）
A. Faulty driver; reinstall or update driver
B. Bad fuser; place service call to printer manufacturer.
C. Excess toner on drum; perform maintenance (e.g. clean drum surface).
D. Deteriorating rollers and worn brushes; replace rollers and brushes.
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单项选择题
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B.Athlon
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After receiving a message at startup stating that ‘One or more services failed to load at startup’,which of the following Windows utilities would a technician use to diagnose the issue?（）
A. Event Viewer
B. System Information
C. Scandisk
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