马达输入能量的形式为压力和流量，而输出形式为转矩和转速。
参考答案：对
So you have to leave. How nice it ________ if you ________a bit longer![ ]
A. would be; could stay
B. is; can stay
C. should be; stay
D. was; are able to stay
讲卫生“五勤”指什么？
