单选题The disinfection of various compartments in a vessel by filling with a gaseous agent to destroy rats and all insects pests which act as germ carriers means（）.AdisplacementBfumigationCdischargingDcompensation
单选题
The disinfection of various compartments in a vessel by filling with a gaseous agent to destroy rats and all insects pests which act as germ carriers means（）.
A
displacement
B
fumigation
C
discharging
D
compensation
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