Since the burning or combustion takes place within the engine itself, the engine is known as （）.<br>A:a fire -tube boiler<br>B:an internal combustion engine<br>C:an external combustion engine<br>D:an internal combustion generator

Since the burning or combustion takes place within the engine itself, the engine is known as （）.
A:a fire -tube boiler
B:an internal combustion engine
C:an external combustion engine
D:an internal combustion generator

出自：海船船员证

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