A.加速B.降速C.變速D.制動
A.泥駁靠泊挖泥船后松放，井應(yīng)在泥駁解纜前絞起B.泥駁靠泊挖泥船前松放，并應(yīng)在泥駁解纜前絞起C.泥駁靠泊挖泥船后收緊，并應(yīng)在泥駁解纜后松放D.泥駁靠泊挖泥船前收緊，并應(yīng)在泥駁解纜中松放
A.25mB.50mC.75m
