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多选题
A customer reports that their sound is not working. They state that the speakers workedpreviously. Which of the following should the technician check?（） (Select THREE).
A
Speakers are in regulatory compliance.
B
Speakers are on and the mute is off.
C
Speakers are on the Windows HCL.
D
The system has enough hard drive space.
E
The audio driver is installed correctly.
F
Speakers are plugged into the correct jack.
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