单选题
1分
If emergency welding repairs must be made to the upper area of a fuel tank, the tank and/or adjacent...
If emergency welding repairs must be made to the upper area of a fuel tank, the tank and/or adjacent compartments may need to be ____.
参考答案: D
参考解析: 如果要对燃油舱的上半区域进行应急焊接修理,该舱的相邻舱室需要除气或惰化并注满水。