Behaviour being used: Deferred feedback
Minimum fraction: 0
Maximum fraction: 1
Question variant: 1
Question summary: BEV是指（ ）。: 燃料电池电动汽车; 混合动力电动汽车; 纯电动汽车; 液化石油气
Right answer summary: 纯电动汽车
Response summary:
Question state: todo