單項(xiàng)選擇題In the Southern Hemisphere winds in a low pressure system rotate in a（）.

A.clockwise direction
B.northeasterly direction
C.northerly direction
D.counterclockwise direction


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1.單項(xiàng)選擇題In the relatively calm area near the hurricane center，the seas are（）.

A.moderate but easily navigated
B.calm
C.mountainous and confused
D.mountainous but fairly regular as far as direction is concerned

3.單項(xiàng)選擇題In the Northern Hemisphere，the right half of the storm is known as the dangerous semicircle because（）.

A.the wind speed is greater here since the wind is traveling in the same general direction as the storm's track
B.the direction of the wind and seas might carry a vessel into the path of the storm
C.the seas are higher because of greater wind speed
D.All of the above

4.單項(xiàng)選擇題In the Northern Hemisphere，if your vessel is in a hurricane’s navigable semicircle it should be positioned with the wind on the（）.

A.Starboard quarter，hold course and make as much speed as possible
B.Port bow，hold course and make as much speed as possible until the hurricane has passed
C.Port quarter，maintain course and make as much speed as possible
D.Starboard bow and heave to until the hurricane has passed

5.單項(xiàng)選擇題In the Northern Hemisphere，an observer at point II in the weather system should experience a wind shift from the（）.

A.Southwest，clockwise to northwest
B.Northeast，clockwise to west-southwest
C.Northeast，counterclockwise to northwest
D.East，counterclockwise to south-southwest