单项选择题
A. to use gloves to pick up the item.
B. to squat and lift from the legs.
C. to have two people bend down and pick the item up.
D. to bend down and lift the item up.
单项选择题 A frustrated and angry customer calls in with a system that does not work. Which of the following is the FIRST course of action for a technician to take?（）
单项选择题 A service technician suspects the fuser assembly needs to be replaced. Which of the following is MOST likely the type of printer being repaired? （）
单项选择题 Which of the following RAID levels requires ONLY two drives and provides mirroring?（）