Which statement is TRUE concerning gasoline vapors on board a vessel（）.<br>A:They are heavier than air and will settle in the lowest part of the vessel<br>B:They are lighter than air and will settle in the highest part of the vessel<br>C:They should be vented into the engine to improve combustion<br>D:They should be vented into the wheelhouse

Which statement is TRUE concerning gasoline vapors on board a vessel（）.
A:They are heavier than air and will settle in the lowest part of the vessel
B:They are lighter than air and will settle in the highest part of the vessel
C:They should be vented into the engine to improve combustion
D:They should be vented into the wheelhouse

出自：海船船员证

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