A.ahead and equal to the ship's speed
B.astern and equal to the ship's speed
C.ahead and equal to twice the ship's speed
D.astern and equal to twice the ship's speed
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A.spring，around late evening
B.spring，around early evening
C.fall，around early morning
D.fall，around midday
A.always forms over water
B.is formed by a temperature inversion
C.is thinnest at the surface
D.dissipates during the evening
A.prevailing westerlies
B.geostrophic winds
C.doldrums
D.horse latitudes
A.create large waves in the direction of the current
B.change direction 360°during a 24 hour period
C.remain fairly constant in direction and velocity throughout the year
D.are characterized by a light green color
A.permanent waves
B.tidal waves
C.tropical waves
D.tropical storms
最新試題
The apparent wind’s speed can be zero only when two conditions are present. One condition is that the true wind（）.
The largest waves (heaviest chop) will usually develop where the wind blows（）.
The height of a wave is the vertical distance（）.
Low pressure disturbances，which travel along the intertropical convergence zone，are called（）.
In mid-ocean，the characteristics of a wave are determined by three factors. What is NOT one of these factors?（）.
In the Northern Hemisphere，a wind that shifts counterclockwise is a（）.
In the Northern Hemisphere you are caught in the dangerous semicircle with plenty of sea room available. The best course of action is to bring the wind on the（）.
The apparent wind can be zero when the true wind is from（）.
The horse latitudes are characterized by（）.
The currents are（）mosoonal origin．