单选题Which hazard probably would NOT be encountered when entering an empty but uncleaned fish hold?（）ALack of oxygenBMethane gasCHydrogen sulfide gasDCarbon monoxide
单选题
Which hazard probably would NOT be encountered when entering an empty but uncleaned fish hold?（）
A
Lack of oxygen
B
Methane gas
C
Hydrogen sulfide gas
D
Carbon monoxide
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