A.getting
B.setting
C.being
D.having
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A.doldrums
B.horse latitudes
C.trade winds
D.prevailing westerlies
A.temperature
B.density
C.deflection
D.speed
A.predicted in Tidal Current Tables
B.unpredictable
C.generally constant
D.generally too weak to be of concern
A.at apogee
B.new
C.full
D.All of the above
A.one flowing in the same direction as your course steered
B.one flowing in the opposite direction as your course steered
C.one that flows at nearly right angles to your course steered
D.a rotary current in which the direction of current flow constantly changes
最新試題
Spring tides are tides that（）.
Which current is responsible for the movement of icebergs into the North Atlantic shipping lanes（）.
Tides are superimposed on nontidal rising and falling water levels，caused by（）．
The steady current circling the globe at about 60°S is the（）.
The term flood current refers to that time when the water（）.
Neap tides occur（）.
To make sure of getting the full advantage of a favorable current，you should reach an entrance or strait at what time in relation to the predicted time of the favorable current?（）
Tide is（）in direction ENE.
Priming of the tides occurs（）.
Water may boil up around the stern of a vessel in a channel due to（）.