单项选择题
A user is trying to boot a desktop PC from their A: drive. Which of the following devices is the userdescribing？（）
A. The floppy drive
B. The hard drive
C. The CD-ROM drive
D. The DVD-ROM drive
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A. The WLAN card is 802.11g.
B. The WLAN card is 802.11b.
C. The WLAN card is 802.11n.
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A. Firmware version
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D. Windows Firewall
