A marine chemist issues gas free certificates and is certified by which organization? （）<br>A:Mine Safety Appliance Association<br>B:American Chemical Society<br>C:Marine Chemists Association<br>D:National Fire Protection Association

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

出自：海船船员证

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