The doldrums are characterized by（）.

Which type of precipitation is a product of the violent convection found in thunderstorms（）.

The southeast trade winds actually blow toward the（）.

Which condition suggests that your present position lies in the navigable semicircle of a tropical storm（）.

If you observe the point of cloud convergence shifting to the right and the “bar”of the storm appears to move along the horizon（）.

Two well-developed high pressure areas may be separated by a（）.

You have determined that you are in the right semicircle of a tropical cyclone in the Northern Hemisphere.What action should you take to avoid the storm（）.

In the Northern Hemisphere，when the wind at your location is northerly，the low pressure center causing the wind is located to your（）.

In the relatively calm area near the hurricane center，the seas are（）.

Which of the following is not a wind（）.