單項(xiàng)選擇題Which of the following is not a frontal term().

A.Ridge
B.Col
C.Trough
D.Bora


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1.單項(xiàng)選擇題Which general weather conditions should you expect to find in a low pressure system().

A.Fair weather
B.Precipitation and cloudiness
C.Scattered clouds at high elevations
D.Gradual clearing and cooler temperatures

2.單項(xiàng)選擇題When steering on autopilot which of the following input conditions may NOT have an effect on the control of the steering gear().

A.Non-follow-up
B.Rudder adjustment
C.Weather adjustment
D.All the above may be activated

3.單項(xiàng)選擇題When observing a rapid rise in barometric pressure,you may expect().

A.Clear weather with no wind,but the possibility of rain or snow within 24 hours
B.Deteriorating weather with rain or snow
C.Heavy rain or severe thundershowers
D.Clearing weather,possibly accompanied by high winds

4.單項(xiàng)選擇題When force of winds reaches 10-11 in Beaufort scale,we usually call such wind().

A.Gale
B.Storm
C.Hurricane
D.Typhoon

5.單項(xiàng)選擇題When a high pressure system is centered north of your vessel in the Northern Hemisphere().

A.You should experience hot,moist,clear weather
B.The wind direction is generally easterly
C.The winds should be from the southwest at your location
D.The winds should be brisk