單項選擇題Lighter longitudinal stiffening frames on the vessel side pating are called（）.
A.stringers
B.side frames
C.side stiffeners
D.intercostals
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1.單項選擇題Line throwing equipment should not be operated（）.
A.during a rain storm
B.in an explosive atmosphere
C.near a lifeboat station
D.by other than licensed officers
2.單項選擇題Logbooks are used to record the events occurring when（）.
A.the ship is in a harbor
B.the ship is at anchorage
C.the ship is underway
D.All of the above
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Despite the rising importance and great convenience of the gyrocompass,the magnetic compass still retain its importance because of its（）.
題型：單項選擇題
In the Northern hemisphere northerly winds may cause temperature（）.
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A tide is called diurnal when（）.
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Manoeuvring information can not be obtained from（）.
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The dew point temperature is（）.
題型：單項選擇題