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单选题
（）is the maximum speed of your ship?
A
How
B
Which
C
How about
D
What
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slow down ship's speedC
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单选题A radar contact will remain stationary on a relative motion radar display only when it is（）.A
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at the same speed as your vesselC
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单选题The main steering gear must be able to steer the ship at maximum ahead service speed and be capable at this speed, and at the ships deepest service draught, of putting the rudder from 35 degrees on one side to 30 degrees on the other side within no （）.A
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Echo from a ship on a reciprocal course at the same speed
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