【单选题】四冲程发动机在一个工作循环内,活塞在汽缸内往复4个行程,曲轴旋转:
【单选题】If someone shares with you something difficult, you try to make things better. What response may be helpful?
A.
You should solve your own problem.
B.
I don't even know what to say now. I 'm just so glad you told me.
【单选题】在一个工作循环内,曲轴旋转2周,活塞在汽缸内往复()个行程,称为四冲程发动机。
【判断题】四冲程发动机在一个工作循环内,曲轴旋转2周。 ( )
【单选题】I 'm glad to be ___ some help.
【判断题】【2】33.四冲程发动机在一个工作循环内,曲轴旋转2周。