If you see someone fall overboard from a vessel，you should（）. ["immediately jump in the water to help the individual","call for help and keep the individual in sight","run to the radio room to send an emergency message","go to the control room for the distress flare"]
Windows Server 2003动态磁盘支持的几种动态卷的特点。
万用表不用时，应将挡位旋到最高交流电压挡或空挡上。
用吊斗运输时有何要求？
运输过程中有何具体要求？
水泵结合器的作用连接消防车向室内给水管网（）。
