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
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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 -
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 -
单项选择题
In the Northern Hemisphere，your vessel is believed to be in the direct path of a hurricane，and plenty of sea room is available. The best course of action is to bring the wind on the（）.
A.starboard bow，note the course，and head in that direction
B.starboard quarter，note the course，and head in that direction
C.port quarter，note the course，and head in that direction
D.port bow，note the course，and head in that direction
