A.bring the sails parallel to the wind
B.reduce sail area exposed to the wind
C.allow the sails to catch more wind
D.remove all tension on the main and jib sheets
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A.Tornado
B.Waterspout
C.Hurricane
D.Cyclone
A.High pressure area
B.Extratropical low-pressure system
C.Tropical storm
D.Easterly wave
A.a high pressure area
B.an extratropical cyclone
C.a tropical storm
D.an easterly wave
A.High pressure
B.Low pressure
C.Subsurface pressure
D.Terrastatic pressure
A.Huge waves approaching from all directions，clearing skies，light winds，and an extremely low barometer
B.Flat calm seas，heavy rain，light winds，and an extremely low barometer
C.Flat calm seas，heavy rain，light winds，and high pressure
D.Huge waves approaching from all directions，clearing skies，light winds，and high pressure
最新試題
The passing of a low pressure system can be determined by periodically checking the（）.
In the Southern Hemisphere winds in a low pressure system rotate in a（）.
Which of the following is not a wind（）.
In the Northern Hemisphere，the right half of the storm is known as the dangerous semicircle because（）.
The southeast trade winds actually blow toward the（）.
Which condition indicates that you are in a hurricane’s dangerous semicircle in the Northern hemisphere（）.
Steady precipitation is typical of（）．
What kind of pressure systems travel in easterly waves（）.
The strong wind will make us（）here for some days.
In the Northern Hemisphere，an observer at point II in the weather system should experience a wind shift from the（）.