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
The velocity of the current in large coastal harbors is（）.
A wave entering（）is likely to produce bores．
The two most effective generating forces of surface ocean currents are（）.
Which statement is TRUE concerning equatorial tides（）.
Spring tides are tides that（）.
Neap tides occur when the（）.
Tropic tides are caused by the（）.
The speed of an ocean current is dependent on（）.
Water may boil up around the stern of a vessel in a channel due to（）.
The term flood current refers to that time when the water（）.