单项选择题
A. Zip drive
B. 15,000 rpm SATA
C. 7,200 rpm IDE
D. USB flash
单项选择题 A user notices the department laser printer is printing light. Which of the following items should a technician do FIRST to fix this issue? （）
单项选择题 A technician is installing an Express Card 54 device into a laptop. How will the device MOST likely be installed?（）
单项选择题 Which of the following channels, when used in close proximity to one another, provide the BESTprotection against crosstalk?（）