单选题
发布日期:2021-03-22
Because carbon dioxide dilutes the oxygen concentration in the atmosphere and may cause asphyxiation
Because carbon dioxide breaks down in a fire into carbon monoxide which may cause blood poisoning in the person breathing this gas
Because carbon dioxide is a colorless and odorless gas that becomes highly toxic in the presence of high temperatures and will quickly incapacitate a person exposed to this gas
This action is unnecessary as carbon dioxide is not poisonous nor toxic but is a relatively harmless gas
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