从产业结构的划分来看，电力行业属于( )。

A．第一产业

B．第二产业

C．第三产业

D．无法判断

Overhauling a fire in the living quarters on a vessel must include（）.

A.opening dead spaces to check for heat or fire

B.evacuation of the vessel

C.sounding the "all clear" signal

D.operation of the emergency generator