检修设备停电,应将各方面的电源完全断开。任何运行中的星形接线设备的中性点,应视为带电设备。不应在只经断路器断开电源或只经换流器闭锁隔离电源的设备上工作。()
参考答案:对
Fire protection regulations for towing vessels require training in all of the following,EXCEPT().
A.putting on a fireman's outfit,if the vessel is so equipped
B.donning a self-contained breathing apparatus,if the vessel is so equipped
C.activating the general alarm and reporting inoperative alarm systems and fire-detection systems
D.refilling and servicing all expended fire extinguishing equipment
不是园林规划设计的作用的是()
A.保证城市园林绿地的发展和巩固
B.是上级主管部门批准园林绿地建设费用的依据
C.园林绿地施工的依据
D.为社会创造效益