单选题
One of the disadvantages of using carbon dioxide to extinguish a fire in an enclosed space is （）.
发布日期：2021-03-22
the snow which is sometimes discharged along with the gas is toxic
prolonged exposure to high concentrations of C02 gas causes suffocation
rapid dissipation of the C02 vapor
the C02 gas is lighter than air and a large amount is required to extinguisha fire near the deck
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