单项选择题
A. C:\Program Files\Users\%username&
B. C:\Documents and Settings\%username%
C. C:\Users\%username%
D. C:\Users\Documents and Settings\%username%
单项选择题 Which of the following commands would MOST likely be used to see where a loss of connectivity between two devices on a network is located?（）
单项选择题 Which of the following needs to be done before a hard drive can be formatted?（）
单项选择题 Which of the following percentages is required for Disk Defragmenter to fully defragment thevolume?（）