单选题A waste heat boiler is installed on some diesel propelled vessels to （）.Aprovide steam for emergency propulsionBprovide steam for the turbo-generatorCheat the waste water tanksDsteam for warming engines
单选题
A waste heat boiler is installed on some diesel propelled vessels to （）.
A
provide steam for emergency propulsion
B
provide steam for the turbo-generator
C
heat the waste water tanks
D
steam for warming engines
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