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问题

The fuel supply system to an automatic auxiliary boiler, will be automatically shutdown if


The fuel supply system to an automatic auxiliary boiler, will be automatically shutdown if the boiler _____.

A.salinity is abnormally high

B.steam demand is too high

C.water level is abnormally low

D.feedwater flow is low

请帮忙给出正确答案和分析,谢谢!

参考答案
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