A.vertical movement of the water
B.horizontal movement of the water
C.density changes in the water
D.None of the above
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A.dike
B.revetment
C.cutoff
D.crib
A.directional current
B.forward current
C.propeller current
D.wake current
最新試題
The velocity of the wind，its steady direction，and the amount of time it has blown determines a wind driven current’s（）.
The steady current circling the globe at about 60°S is the（）.
Priming of the tides occurs（）.
Which current would you encounter on a direct passage from southern Africa to Argentina，South America（）.
The tide（）.It’s 2 hours before low water，and（）your present position you will be aground at low water.
The velocity of the current in large coastal harbors is（）.
Which statement is TRUE concerning equatorial tides（）.
Spring tides are tides that（）.
You are anchoring in a river where the current is from one direction only.The best way to lay out two anchors is to have them（）.
Which current is responsible for the movement of icebergs into the North Atlantic shipping lanes（）.