主要热力性能指标及结构参数?
参考答案:
吸排气,容积流量,供气量,排气温度,功与功率,效率,活塞平均速度,转速,行程,气缸直径。
__________ five minutes_________ before the last train left, we arrived at the station.
A.There were; to go
B.With; to go
C.I was; left
D.It had; left