单项选择题
A.always forms over water B.is formed by a temperature inversion C.is thinnest at the surface D.dissipates during the evening
On the pole side of the trade wind belt，there is an are...
单项选择题On the pole side of the trade wind belt，there is an area of high pressure with weak pressure gradients and light，variable winds. This area is called the（）.
A.prevailing westerlies B.geostrophic winds C.doldrums D.horse latitudes
Ocean currents are well defined and（）.A.create large wa...
单项选择题Ocean currents are well defined and（）.
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
Low pressure disturbances，which travel along the intert...
单项选择题Low pressure disturbances，which travel along the intertropical convergence zone，are called（）.
A.permanent waves B.tidal waves C.tropical waves D.tropical storms
