列车制动减压时,排风未止就进行追加减压,等于施行了()
参考答案:一次大减压
—Where have you been?
— I ______ in the heavy traffic. Otherwise I ______ here earlier.
A.have got stuck; would have come
B.got stuck; was
C.got stuck; would have come
D.had to stuck; would come
某台正在运转的水泵,测得其流量为36m3/h,观察压力表读数为0.364MPa真空表读数为1000mmHg,如果该泵的效率为60%时,试计算该泵的轴功率,应当配用多大电机。