A.is flowing towards the land
B.is moving towards the ocean
C.level is not changing
D.level is rising because of heavy rains
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A.Prevailing Westerly
B.Sub-Polar Flow
C.West Wind Drift
D.Humboldt Current
A.the density of the water
B.the air temperature
C.the presence of a high pressure area near it
D.underwater soil conditions
A.density differences of the water
B.rotation of the earth
C.direction of primary circulation of air
D.all of the above
A.north
B.east
C.southwest
D.northwest
A.speed of the current at a particular time
B.maximum speed of the current
C.direction from which the current flows
D.direction in which the current flows
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Spring tides are tides that（）.
The velocity of the current in large coastal harbors is（）.
A wave entering（）is likely to produce bores．
Tide is（）in direction ENE.
Which current would you encounter on a direct passage from southern Africa to Argentina，South America（）.
You are docking a vessel．Wind and current are most favorable when they are（）.
Which current is responsible for the movement of icebergs into the North Atlantic shipping lanes（）.
Neap tides occur only（）.
The winds with the greatest effect on the set，drift，and depth of the equatorial currents are the（）.
When daylight savings time is kept，the time of tide and current calculations must be adjusted.One way of doing this is to（）.