單項(xiàng)選擇題Which current is responsible for the movement of icebergs into the North Atlantic shipping lanes().

A.Iceland Current
B.Baltic Current
C.Labrador Current
D.Baffin Current


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2.單項(xiàng)選擇題When daylight savings time is kept,the time of tide and current calculations must be adjusted.One way of doing this is to().

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

3.單項(xiàng)選擇題Tides are superimposed on nontidal rising and falling water levels,caused by().

A.freshets
B.floods
C.river flows
D.seismic events

4.單項(xiàng)選擇題The set of the current is the().

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

5.單項(xiàng)選擇題The Benguela Current flows in a().

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