单项选择题
A. Answer the call to determine its importance.
B. Ignore the call and return the call from a land line.
C. Answer the call and leave the location in order to talk.
D. Silence the phone and allow the call to go to voice mail.
单项选择题 A technician has been asked to ensure a PC is supplied with power for a short time, during apower failure. The technician should install which of the following devices to ensure thisrequirement is easily met?（）
单项选择题 A home user would like to connect their laptop display to their home HD television. Which of the following is the BEST solution?（）
单项选择题 After swapping an internal wireless card on a laptop with an identical model, the technician notices that the wireless does not work. Which of the following would be the MOST likely cause?（）