单项选择题
When replacing a laptop’s hard drive, which of the following may need to be updated?（）
A. The CD drive
B. The network drivers
C. The system OS
D. The system BIOS
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A. It forces hot air out of the PC
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When Bob, a technician, powers up a desktop PC, the unit will repeat three short beeps and will not POST. Which of the following is MOST likely the problem?（）
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Which of the following is the default location for user account files in Windows Vista?（）
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