An alarm device inserted between the deaerating tank and the expansion tank can notify the on-watching crew that （）<br>A:the expansion tank is lack of water<br>B:the expansion tank is over flowing<br>C:there is something wrong with the cooling system<br>D:there is something wrong with the engine

An alarm device inserted between the deaerating tank and the expansion tank can notify the on-watching crew that （）
A:the expansion tank is lack of water
B:the expansion tank is over flowing
C:there is something wrong with the cooling system
D:there is something wrong with the engine

出自：海船船员证

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