不属于船舶配电系统线制的是（） ["直流配电系统","单相交流配电系统","两相交流配电系统","三相交流配电系统"]
When ship is fouled, increasing the fuel injection for keeping the normal speed will cause the main engine （） ["to work as overload characteristic","overspeed","over mechanical load only","over thermal load only"]
In ship construction，bulkheads in the quarters are generally（）. ["structural","watertight","non-structural","continuou"]
国家电力公司分公司、集团公司、省电力公司安全生产目标是什么？
The fire of burning plastics is classified as （） fire. ["Class A","Class B","Class C","Class D"]
种实调制的内容有（）、（）、（）和（）。
