警车、消防车、救护车、工程救险车执行紧急任务时,其他车辆()
A、可加速穿行
B、可谨慎超越
C、视情让行
D、应当让行
参考答案:D
The bell for the break rang and the students stopped _____ a rest. [ ]
A. to have
B. have
C. having
D. had
异步电动机的气隙很小,中小电机一般为()。
A、0.l~1mm
B、0.2~0.5mm
C、0.2~2mm
D、0.3~2.5mm