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Why is it necessary to extend ventilators of gasoline powered vessels to the bilges ________．
A.To keep them dry，and thus easier to clean
B.To remove fuel vapors which are heavier than air
C.To provide adequate air to the engines
D.To cool the machinery areas
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更多 “ Why is it necessary to extend ventilators of gasoline powered vessels to the bilges ________．A.To keep them dry，and thus easier to cleanB.To remove fuel vapors which are heavier than airC.To provide adequate air to the enginesD.To cool the machinery areas ” 相关考题
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