单项选择题
A foam-type portable fire extinguisher is most useful in fighting a fire in（）.
A.generators B.oil drums C.the bridge controls D.combustible metals
单项选择题 A foam-type portable fire extinguisher would be most useful in combating a fire in（）.
单项选择题 A galley grease fire on the stove may be extinguished using（）.
单项选择题 A gypsy or gypsyhead is a（）.
