單項(xiàng)選擇題Which statement is TRUE concerning apogean tides（）．

A.They occur only at quadrature
B.They occur when the Moon is nearest the Earth
C.They cause diurnal tides to become mixed
D.They have a decreased range from normal


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1.單項(xiàng)選擇題Which current would you encounter on a direct passage from southern Africa to Argentina，South America（）.

A.South Atlantic
B.South Equatorial
C.Agulhas
D.Guinea

2.單項(xiàng)選擇題Which current would you encounter on a direct passage from London，England，to Capetown，South Africa（）.

A.Falkland Current
B.Brazil Current
C.Norway Current
D.Benguela Current

3.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

5.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