A.the density of the water
B.the air temperature
C.the presence of a high pressure area near it
D.underwater soil conditions
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A.density differences of the water
B.rotation of the earth
C.direction of primary circulation of air
D.all of the above
A.north
B.east
C.southwest
D.northwest
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.east
B.northeast
C.southwest
D.west
A.velocity of current in knots
B.direction from which the current flows
C.estimated current
D.direction toward which the current flows
最新試題
Which statement is TRUE concerning equatorial tides（）.
Neap tides occur when the（）.
The term flood current refers to that time when the water（）.
The two most effective generating forces of surface ocean currents are（）.
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?（）
Neap tides occur（）.
Which statement is TRUE concerning apogean tides（）．
The velocity of the current in large coastal harbors is（）.
When there are small differences between the heights of two successive high tides or two successive low tides，the tides are called（）.
The tide（）.It’s 2 hours before low water，and（）your present position you will be aground at low water.