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
The two most effective generating forces of surface ocean currents are（）.
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?（）
The set of the current is the（）.
The tide（）.It’s 2 hours before low water，and（）your present position you will be aground at low water.
Priming of the tides occurs（）.
The Benguela Current flows in a（）.
The velocity of the current in large coastal harbors is（）.
Tropic tides are caused by the（）.
The steady current circling the globe at about 60°S is the（）.
The velocity of the wind，its steady direction，and the amount of time it has blown determines a wind driven current’s（）.