单选题Repair of structures on a ship in the vicinity of liquid mud handling areas presents what possible hazard?（）AToxic gasses may be presentBFlammable gasses may be presentCLiquid muds may flood adjoining spacesDAn oxygen-deficient atmosphere may be present
单选题
Repair of structures on a ship in the vicinity of liquid mud handling areas presents what possible hazard?（）
A
Toxic gasses may be present
B
Flammable gasses may be present
C
Liquid muds may flood adjoining spaces
D
An oxygen-deficient atmosphere may be present
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