單項(xiàng)選擇題Navigate with（）.Small fishing boats are within 0.8 miles of me.
A.careful
B.skill
C.concern
D.caution
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1.單項(xiàng)選擇題None of the ship’s papers（）.
A.has expired
B.has been expired
C.has expiring
D.be expired
2.單項(xiàng)選擇題Please look at（）is printed on the certificate.
A.that
B.it
C.which
D.what
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In the Northern hemisphere northerly winds may cause temperature（）.
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According to the relevant regulation, lifeboat should be powered by（）.
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When steering by autopilot,how often should the steering be checked?（）
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（）is halfway between the forward and after perpendiculars and is reference point for vessel construction.
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（）is on the panel of radar.
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