单选题If a small fire initially breaks out in the engine room bilges, in which of the following sequences should the fire extinguishing agents or systems be used?（）AFixed CO2,semi-portable CO2, then hand portable CO2BSemi-portable CO2, fixedCO2, then hand portable CO2CHand portable, semi-portable CO2, then as a last resort the fixed CO2 systemDHand portable, fixed CO2, then as a last resort the semi-portable CO2
单选题
If a small fire initially breaks out in the engine room bilges, in which of the following sequences should the fire extinguishing agents or systems be used?（）
A
Fixed CO2,semi-portable CO2, then hand portable CO2
B
Semi-portable CO2, fixedCO2, then hand portable CO2
C
Hand portable, semi-portable CO2, then as a last resort the fixed CO2 system
D
Hand portable, fixed CO2, then as a last resort the semi-portable CO2
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