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?（）

A. Change the BIOS settings to the local time
B. Adjust the voltage selector switch
C. Attach a 220 volt power strip from the current region to the PC
D. Attach a 120 volt battery backup power supply to the PC

单项选择题The contrast ratio for an LCD monitor is BEST defined as the ratio between:（）

A. display resolution and brightness.
B. power consumption and output intensity.
C. power savings of a comparable crt monitor and the lcd.
D. the darkest and lightest displayed output.

单项选择题A user can no longer launch their word processing program. The program worked fine yesterday.Which of the following options could BEST be used to fix the word processing program?（）

A. Safe Mode
B. Automated System Recovery
C. Last Known Good Configuration
D. System Restore

单项选择题A user is having problems printing. The technician believes the printer may be out of ink. Which of the following troubleshooting steps should be performed NEXT?（）

A. Establish a plan of action to resolve the problem
B. Implement the solution
C. Test the theory to determine cause
D. Verify full system functionality

单项选择题A user is currently running Windows XP Media Center 32-bit and wants to upgrade to WindowsVista. An in-place upgrade is required. Which of the following versions can be used to accomplish this?（）

A. Windows Vista Home Premium
B. Windows Vista Home Basic
C. Windows Vista Ultimate 64-bit
D. Windows Vista Business 64-bit