单项选择题
Which of the listed classes of fire is considered as one involving electrical equipment?（）
A.Class "A" B.Class "B" C.Class "C" D.Class "D"
单项选择题 Besides heat, fuel, and oxygen, which of the following is necessary for a fire to exist?（）
单项选择题 A fire and boat drill on a tank vessel shall, by regulation, include （）.
单项选择题 A fire in an electrical generator is considered to be （）.
