单项选择题 The technician is repairing a PC which appears to have a failing RAM module. After replacing the module, the extra memory still is not registering. Which of the following is MOST likely the issue?（）

单项选择题 Which of the following technologies is the MOST secure form of wireless encryption?（）

单项选择题 A technician arrives in Germany and discovers that when their PC is plugged into the outlet, nopower is received. Which of the following actions should the technician take to get the PC tooperate?（）