点检的对象设备分为哪三类?
参考答案:
点检的对象设备分为:主作业线设备、辅助生产作业线设备和其他预防维修设备。
指出下列哪一项为大城市主干路的机动车设计车速( )
A.80km/hB.60km/hC.50km/hD.45km/h
Tom was so wild about computer games that he would stay online for ten hours _____every day.
A.in the end
B.in particular
C.on end
D.on purpose