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船舶主机换向,从前进三到后退三约需时间为( )。

(A)蒸汽机船60~90s,汽轮机船90~120s,内燃机船120~180s

(B)内燃机船60~90s,蒸汽机船90~120s,汽轮机船120~180s

(C)汽轮机船60~90s,蒸汽机船120~180s,内燃机船90~120s

(D)蒸汽机船60~90s,内燃机船90~120s,汽轮机船120~180s

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