單項(xiàng)選擇題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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1.單項(xiàng)選擇題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

2.單項(xiàng)選擇題Low pressure disturbances，which travel along the intertropical convergence zone，are called（）.

A.permanent waves
B.tidal waves
C.tropical waves
D.tropical storms

3.單項(xiàng)選擇題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

4.單項(xiàng)選擇題In the Northern Hemisphere，a wind that shifts counterclockwise is a（）.

A.veering wind
B.backing wind
C.reverse wind
D.chinook wind

5.單項(xiàng)選擇題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（）.

A.starboard bow and make as much headway as possible
B.starboard quarter，and make as much headway as possible
C.port quarter，and make as much headway as possible
D.port bow，and make as much headway as possible