空气位操作,空气制动阀在缓解位时,将沟通调压阀管与()的通路。
参考答案:均衡风缸管
In April, thousands of holidaymakers remained ________ abroad due to the volcanic ash cloud.
A.sticking
B.stuck
C.to be stuck
D.to have stuck
肺囊肿合并感染()
A.咳嗽伴咯血
B.咳嗽伴胸痛
C.咳嗽伴呼吸困难
D.咳嗽伴大量脓痰
E.咳嗽伴哮鸣音