單項(xiàng)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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1.單項(xiàng)選擇題Manila lines in which the strands are right-hand laid（）.
A.should be coiled in a clockwise direction
B.should be coiled in a counterclockwise direction
C.may be coiled either clockwise or counterclockwise
D.should never be coiled
2.單項(xiàng)選擇題Mariners are warned that fog signals should（）be relied upon implicity.
A.always
B.never
C.sonetimes
D.sometime
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Fog is likely to occur when there is little difference between the dew point and the（）.
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