电空制动控制器手柄由过充位移运转位时，过充风缸的压力空气由（）排向大气。
A.过充风缸上缩孔
B.排风2电空阀
C.中继阀排风口
参考答案：A
Last night, an accident happened at ________ crossroad a few meters away from _____supermarket．
A．a; a
B．/ ; a
C．/ ; the
D．the; /
