A.
2-7通电后,1-4和8-5瞬时断开,1-3和8-6瞬时闭合;2-7断电后,1-3和8-6延时断开,1-4和8-5延时闭合
B.
2-7通电后,1-4和8-5延时断开,1-3和8-6延时闭合;2-7断电后,1-3和8-6瞬时断开,1-4和8-5瞬时闭合
C.
2-7通电后,1-4和8-5延时闭合,1-3和8-6延时断开;2-7断电后,1-3和8-6瞬时闭合,1-4和8-5瞬时断开
D.
2-7通电后,1-4和8-5瞬时闭合,1-3和8-6瞬时断开;2-7断电后,1-3和8-6延时闭合,1-4和8-5延时断开