The exhaust boilers are used to recover some of （） carried in the exhaust gas from the main engine.<br>A:water<br>B:oil<br>C:heat<br>D:steam

The exhaust boilers are used to recover some of （） carried in the exhaust gas from the main engine.
A:water
B:oil
C:heat
D:steam

出自：海船船员证

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