单项选择题
Which statement about firefighting foam is TRUE?（）
A.Foam conducts electricity B.To be most effective，foam should be directed at the base of the fire C.Foam is most effective on burning liquids which are flowing D.Foam can ONLY be used to extinguish class A fires
单项选择题 Which procedure should be followed when individuals are rescued in cold climates and suffer from hypothermia?（）
单项选择题 Which of the following statements regarding low expansion foam and its application is INCORRECT?（）.
单项选择题 Which of the following is not a maritime perils?（）.
