单项选择题
A.attempt to isolate the fire from the LPG
B.cool the bottles or remove them from the fire area
C.see that the valves on all LPG bottles are closed
D.place insulating material over the bottles
单项选择题 What would you consult to determine the number of persons required on duty while loading a cargo of leaded gasoline on your tanker? （）
单项选择题 What will NOT increase friction of a liquid flowing in a pipe and cause a loss of suction head?（）.
单项选择题 What normally helps in detecting escaping gas? （）