單項(xiàng)選擇題Smoking in bed on a ship is prohibited（）.
A.at all times
B.during evening hours
C.unless another person is present
D.during drilling operations
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1.單項(xiàng)選擇題Should the vessel have no deratisation certificate at the time of her delivery，she（）be held to be unseaworthy.
A.shall
B.should
C.may
D.would
2.單項(xiàng)選擇題Proper use shall be made（）radar equipment if fitted and operational.
A.of
B.to
C.on
D.with
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