Only when _________ in the afternoon ________ able to leave.

A．the match was over; they were

B．was the match over; were they

C．was the match over; they were

D．the match was over; were they

当前轮转弯转到要求的角度时（）

A.反馈随动钢索作动加法连杆使计量活门回到中立位，作动筒停止运动

B.反馈传感器给出位置信号，液压控制组件关断液压，作动筒停止运动

C.作动筒内部位置反馈机构切断液压，停止运动

D.行程限制机构控制作动筒运动到要求的角度