单项选择题
A marine chemist issues gas free certificates and is certified by the（）.
A.Mine Safety Appliance Association B.American Chemical Society C.Marine Chemists Association D.National Fire Protection Association
单项选择题 A large oil fire on the deck of a ship can be fought most effectively with（）.
单项选择题 A GROUP OF CREW MEMBERS TRAINED FOR FIGHTING FLOODING IN THE VESSEL are known as（）.
单项选择题 A galley grease fire on the stove may be extinguished using（）.
