单项选择题
In an emergency，the electro-hydraulic steering units can be directly controlled by the（）.
A.trick wheel B.rapson slide C.follow-up gear D.receiver unit
单项选择题 In a Williamson turn，the rudder is put over full until the（）.
单项选择题 If you see someone fall overboard from a ship，you should（）.
单项选择题 If an emergency pump control is used as the emergency shutdown on a tank vessel，it must（）.
