多车重联进入区间分散作业解列后,各车必须进行();作业完毕车辆联挂后,由本务机司机对全列车进行制动机试验。
A、制动试验
B、两车联控
C、鸣笛
D、引导
参考答案:A
He was annoyed for _________ outside while his wife was shopping with the key.[ ]
A. being kept
B. keeping
C. kept
D. to be kept
“止步,高压危险!”标示牌悬挂位置,其主要作用是什么?