单项选择题
A. Optical drive B. Power supply C. CMOS battery D. CD-ROM disk
Which of the following wireless standards uses the 5GHz...
单项选择题Which of the following wireless standards uses the 5GHz frequency?（）
A.802.11g B.802.2 C.802.11a D.802.3
Which of the following will cause a ghost image on a pr...
单项选择题Which of the following will cause a ghost image on a printout?（）
A. Problem with the developing drum B. Problem with the formatter board C. Worn pickup rollers D. Scanner unit is defective
Which of the following commands would a technician use ...
单项选择题Which of the following commands would a technician use to view the active applicationconnections on a local PC to the network?（）
A.ipconfig B.netstat C.nslookup D.net use
