题目内容

应答器只能向正向运行的列车发送临时限速信息

A. 正确
B. 错误

查看答案
更多问题

In a four-stroke cycle diesel engine the intake valves open ()

A. before TDC and close after BDC
B. after TDC and close after BDC
C. before TDC and close before BDC
D. after TDC and close before BDC

饥饿收缩

何为调节阀反装?

溶液的组成是什么?

答案查题题库