單項(xiàng)選擇題Upon arrival at the discharging port, the inert gas system is（）.
A.turned on
B.turning on
C.turn on
D.to turn on
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1.單項(xiàng)選擇題Vessels are required（）Singapore Port Service when passing the points indicated.
A.communicating with
B.to communicate with
C.be communicated
D.will communicate
2.單項(xiàng)選擇題Vessels are warned（）in this area.
A.to not anchor
B.to anchor not
C.not to anchor
D.not anchor to
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（）is the act of allocating space to containers on board of a container ship in the order of the discharge ports.
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Despite the rising importance and great convenience of the gyrocompass,the magnetic compass still retain its importance because of its（）.
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The ISM code is part of（）.
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The helm command PORT TWENTY means（）.
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When the wave period and the apparent rolling period are the same（）.
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