单项选择题
A. An IEEE-1394 device
B. A NIC device
C. An IrDA device
D. A FDD device
单项选择题 Which of the following commands will make exact duplicates of files and directory trees?（）
单项选择题 Which of the following commands would be used to move the working directory from C:\ to C:\Windows?（）
单项选择题 A technician is dispatched to a system that will not go beyond the Windows XP splash screen.Which of the following, after restart, would allow the technician to load Windows XP?（）