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

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单项选择题

A.dry chemical
B.foam
C.high-velocity fog
D.Water (cartridge-operated)

单项选择题

A.Fire party
B.Deck cadets
C.Research team
D.Damage control team

单项选择题

A.water
B.foam
C.the range hood extinguishing system
D.fire dampers