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单选题
A technician receives a laptop work order stating that the mouse pointer from the touchpad is moving randomly around the screen. Which of the following should the technician do FIRST？（）
A
Reboot the computer.
B
Replace the touchpad.
C
Clean the touchpad.
D
Update the driver.
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单选题A work order has been created to perform corrective maintenance on a defective generator. All required information has been provided in the work order， but required materials are not in stock and have to be ordered. What is the status of the work order， after a maintenance manager has approved the work order？ （）A
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The boot order in the BIOSB
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The WAP is using 802.11a frequencies.C
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DDR RAMC
SDRAMD
SODIMM
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单选题If an external monitor is attached to a laptop and it does not work， which of the following actions should a technician take FIRST？（）A
Re-install the operating system.B
Open and close the cover.C
Use the function key to activate the monitor.D
Install new software for the keyboard.
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