A.Moon being at its maximum declination
B.Moon crossing the equator
C.Sun and Moon both being near 0°declination
D.Moon being at perigee
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A.One hour after the predicted time
B.At the predicted time
C.30 minutes before flood，one hour after an ebb
D.30 minutes before the predicted time
A.getting
B.setting
C.being
D.having
A.doldrums
B.horse latitudes
C.trade winds
D.prevailing westerlies
A.temperature
B.density
C.deflection
D.speed
A.predicted in Tidal Current Tables
B.unpredictable
C.generally constant
D.generally too weak to be of concern
最新試題
Which statement is TRUE concerning equatorial tides（）.
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?（）
Which statement is TRUE concerning apogean tides（）．
The type of current which will have the greatest effect on the course made good for your vessel is（）.
Neap tides occur only（）.
Which current would you encounter on a direct passage from London，England，to Capetown，South Africa（）.
The two most effective generating forces of surface ocean currents are（）.
The Benguela Current flows in a（）.
Neap tides occur when the（）.
When there are small differences between the heights of two successive high tides or two successive low tides，the tides are called（）.