单项选择题
A class C fire would be burning（）.
A.fuel oil B.wood C.celluloid D.electrical insulation
单项选择题 A class B fire is most successfully fought by（）.
单项选择题 A Certificate of Inspection issued to a small passenger vessel describes（）.
单项选择题 A carburetor is required to have a safety device called a(n)（）.
