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对一例CO2引起的急性中毒事故进行分析，结果表明该中毒是由两个原因引起的，一个是因无通风设备，洪水袭击地面水位上涨，使泵房内的CO2浓度升高，另一个是由于空气中逆温引起的，逆温在这次中毒起主要作用，现场测定CO2浓度为47142．9mg／m3，只要注意类似事故是可以避免的。
A case of acute poisoning caused by CO 2 was analyzed. The results showed that the poisoning was caused by two reasons, one was the increase of CO2 concentration in the pump room due to the rise of ground water level due to flood attack without ventilation and the other was due to Inversion caused by air temperature, temperature inversion in the poisoning play a major role in the on-site determination of CO2 concentration of 47142.9mg / m3, as long as attention to similar accidents can be avoided.