单项选择题
A. assign the appropriate status level for the problem.
B. create records which enable user authentication.
C. help maintain a balanced workload for the help desk technicians.
D. identify common problems among many users.
单项选择题 IEEE 1394b has a maximum transfer rate of:（）
单项选择题 Older video cards used S-video to output to a TV. This standard has been replaced by:（）
单项选择题 A user reports poor picture quality with a laptop connected to an LCD. Which of the followingshould the technician check FIRST for optimal picture quality?（）