间断制氧操作，在重新恢复制氧时应如何启动？
抓好采掘作业规程的贯彻要强化以下几个方面（）。 ["查管理","查现场","查措施","查隐患整改","查规程"]
When a hurricane passes into high latitudes over colder water and the source of heat is disrupted，the storm assumes the characteristics of（）. ["a high pressure area","an extratropical cyclone","a tropical storm","an easterly wave"]
isql –Usa –Pserver1234命令中，如下解释正确的是（）。 ["用户为sa，口令为Pserver1234","用户为sa，口令为server1234","用户为Usa，口令为Pserver1234","用户为Usa，口令为server1234"]
斗轮堆取料机主要由哪几部分组成？
输煤系统的传感器对程控有何影响？
