A.Iceland Current
B.Baltic Current
C.Labrador Current
D.Baffin Current
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A.Diurna
B.Semi-diurnal
C.Solar
D.Mixed
A.Add one hour to the times listed under the reference stations
B.Subtract one hour from the time differences listed for the subordinate stations
C.Apply no correction as the times in the reference stations are adjusted for daylight savings time
D.Add 15° to the standard meridian when calculating the time difference
A.freshets
B.floods
C.river flows
D.seismic events
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
最新試題
Water may boil up around the stern of a vessel in a channel due to().
The tide is().
Neap tides occur when the().
Stand of the tide is that time when().
A wave entering()is likely to produce bores.
The speed of an ocean current is dependent on().
Neap tides occur only().
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?()
Spring tides are tides that().
When there are small differences between the heights of two successive high tides or two successive low tides,the tides are called().