多项选择题
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.
单项选择题 A customer, Bob, needs to be able to access the Internet while traveling. Which of the following could Jill, a technician, recommend to Bob?（）
单项选择题 An uninstalled program is still attempting to load when Windows starts. Which of the following options can the technician suggest to stop this unwanted program from loading?（）
单项选择题 A user reports that their PC is making a strange noise. Which of the following is the cause of the problem?（）