题目内容
（请给出正确答案）
[主观题]
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, fixed CO2, 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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