单选题A user reports that after configuring the BIOS to boot to the hard drive first, the system still tries to boot from the optical drive. Which of the following is the MOST likely cause?（）AOptical driveBPower supplyCCMOS batteryDCD-ROM disk
单选题
A user reports that after configuring the BIOS to boot to the hard drive first, the system still tries to boot from the optical drive. Which of the following is the MOST likely cause?（）
A
Optical drive
B
Power supply
C
CMOS battery
D
CD-ROM disk
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解析：
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