短路时，电源产生的电能全消耗在（）上。 电源内阻。 导线。 负载。
A flashing red light displayed at a single lock means that the lock（）. is ready to use but vessels must stand clear。 is ready to use and vessels may approach。 cannot be made ready immediately and vessels shall stand clear。 cannot be made ready immediately but vessels may approach。
海船规范规定逆功率保护延时动作的时间为（）。 3s以下。 3s～10s。 15s。 30。
You are on an ice-reinforced vessel about to enter packice. You should（）. enter the pack on the windward side where there is a well defined ice edge。 trim to an even keel or slightly down by the bow to take maximum benefit of the ice reinforcement。 take maximum advantage of coastal leads caused by offshore winds。 look for areas of rotten ice and enter perpendicular to the ice edge。
船舶报警系统手动检测应每月进行一次。
海船规范对船舶发电机的环境温度规定为（）
