Behaviour being used: Deferred feedback
Minimum fraction: 0
Maximum fraction: 1
Question variant: 1
Question summary: 电动汽车与传统汽车的区别是动力源和（ ）。: 变速器系统; 悬架系统; 驱动系统; 行驶系统
Right answer summary: 驱动系统
Response summary:
Question state: todo