A.it is above 70°F
B.the ground over which it moves is cooler than the air
C.it originated in a high pressure area
D.it originated in a low pressure area
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A.steady rainfall
B.hail storms
C.thunderstorms
D.tornadoes or waterspouts
A.drops，and the temperature drops
B.drops，and the temperature rises
C.rises，and the temperature drops
D.rises，and the temperature rises
A.fluctuates
B.remains the same
C.remains the same，with clouds forming rapidly
D.rises，often quite rapidly，with clearing skies
A.Backing (of wind)
B.Beach (to)
C.Veering (of wind)
D.Maintaining direction of the wind
A.summarizes a great deal of information
B.can be interpreted accurately
C.appears daily
D.is prepared by the Weather Bureau
最新試題
In Beaufort Scale，the wind force 7 with speed of 28-33 knots is defined as（）.
If the center of low pressure is due west of you in the Northern Hemisphere，which wind direction should you expect（）.
The area of strong westerly winds occurring between 40°S and 60°S latitude is called the（）.
The dense black cumulonimbus clouds surrounding the eye of a hurricane are called（）.
When force of winds reaches 10-11 in Beaufort scale，we usually call such wind（）.
Which of the following is not a frontal term（）.
West backing south-west gale 8 locally storm 10（）then rain or sleet mainly good.
After a cold front passes，the barometric pressure（）.
When a high pressure system is centered north of your vessel in the Northern Hemisphere（）.
Which general weather conditions should you expect to find in a low pressure system（）.