A.freshets
B.floods
C.river flows
D.seismic events
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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
A.SW'ly direction along the NW coast of Africa
B.S'ly direction off the East Coast of Australia
C.NW'ly direction along the SW coast of Africa
D.SW'ly direction along the SE coast of Greenland
A.the vertical rise or fall of the tide has stopped
B.slack water occurs
C.tidal current is at a maximum
D.the actual depth of the water equals the charted depth
A.have lows lower than normal and highs higher than normal
B.have lows higher than normal and highs lower than normal
C.are unpredictable
D.occur in the spring of the year
A.Pick up speed where the channel widens
B.Run slower in the center of the channel
C.Hug the inside of a bend
D.Cause the greatest depth of water to be along the outside of a bend
最新試題
Which current would you encounter on a direct passage from southern Africa to Argentina，South America（）.
When there are small differences between the heights of two successive high tides or two successive low tides，the tides are called（）.
Which statement is TRUE concerning equatorial tides（）.
Stand of the tide is that time when（）.
Tide is（）in direction ENE.
The term flood current refers to that time when the water（）.
The speed of an ocean current is dependent on（）.
The two most effective generating forces of surface ocean currents are（）.
Which statement is TRUE concerning apogean tides（）．
Priming of the tides occurs（）.