A.black
B.setting
C.being
D.having
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A.falls／in
B.has been falling／on
C.has fallen／at
D.is falling／in
A.is flowing towards the land
B.is moving towards the ocean
C.level is not changing
D.level is rising because of heavy rains
A.Prevailing Westerly
B.Sub-Polar Flow
C.West Wind Drift
D.Humboldt Current
A.the density of the water
B.the air temperature
C.the presence of a high pressure area near it
D.underwater soil conditions
A.density differences of the water
B.rotation of the earth
C.direction of primary circulation of air
D.all of the above
最新試題
When daylight savings time is kept，the time of tide and current calculations must be adjusted.One way of doing this is to（）.
The steady current circling the globe at about 60°S is the（）.
A wave entering（）is likely to produce bores．
Which statement is TRUE concerning apogean 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?（）
The winds with the greatest effect on the set，drift，and depth of the equatorial currents are the（）.
The velocity of the wind，its steady direction，and the amount of time it has blown determines a wind driven current’s（）.
Neap tides occur（）.
The velocity of a rotary tidal current will be decreased when the Moon is（）.
The two most effective generating forces of surface ocean currents are（）.