简述传输模式单工，半双工，全双工的特点。

A. use the magnets one at a time，putting one in one side and then one on the opposite side，one step higher
B. use the magnets in pairs，starting at the top，with trays at the highest point of travel
C. use the magnets in pairs，from the bottom up，with the trays at the lowest point of travel
D. fill all the trays with magnets，then remove them one-by-one until the deviation is removed

A. 视觉暂留
B. 一致性
C. 互动性
D. 人眼对焦差