单选题A marine chemist issues gas free certificates and is certified by which organization? （）AMine Safety Appliance AssociationBAmerican Chemical SocietyCMarine Chemists AssociationDNational Fire Protection Association
单选题
A marine chemist issues gas free certificates and is certified by which organization? （）
A
Mine Safety Appliance Association
B
American Chemical Society
C
Marine Chemists Association
D
National Fire Protection Association
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