单项选择题
A.prevailing westerlies
B.geostrophic winds
C.doldrums
D.horse latitudes
单项选择题 Ocean currents are well defined and（）.
单项选择题 Low pressure disturbances，which travel along the intertropical convergence zone，are called（）.
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（）.