The water level of an exhaust gas boiler which is independent of the auxiliary boiler and just as the extra heating surface of it （）<br>A:will be modulated in proportion<br>B:will be modulated in proportion and integral<br>C:will be modulated in proportion and differential<br>D:will not be modulated at all

The water level of an exhaust gas boiler which is independent of the auxiliary boiler and just as the extra heating surface of it （）
A:will be modulated in proportion
B:will be modulated in proportion and integral
C:will be modulated in proportion and differential
D:will not be modulated at all

出自：海船船员证

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