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问题详情

If in doubt as to the true water level when a boiler is being oil-fired, you should （）.

A、take no measures

B、extinguish the fire as soon as possible

C、feed water to the boiler

D、open the blow down valve

时间：2022-01-10 18:51 关键词：船舶辅助机械

答案解析

B

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