A.at
B.by
C.to
D.for
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A.in
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A.switch
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最新試題
A tide is called diurnal when（）.
The circulation around a low pressure center in the Northern Hemisphere is（）.
When the wave period and the apparent rolling period are the same（）.
How long are you prohibited to consume alcohol prior to serving as a member of a watch?（）
Full details of all lights and fog signals are shown on（）.
（）is on the panel of radar.
What is it called when it is possible to ignite the vapour above the oil?（）
What is a CORRECT reply to a pilot’s request, How’s your heading?（）
（）is halfway between the forward and after perpendiculars and is reference point for vessel construction.
（）is where the crew eat their meals.