A.HailB.Heavy rainC.SleetD.FogWhile on watch，you notice……

单项选择题Which of the following statements concerning frontal movements is TRUE（）.

A.The temperature rises after a cold front passes
B.The barometric pressure rises when a warm front passes
C.A cold front generally passes faster than a warm front
D.A warm front usually has more violent weather associated with it than a cold front

单项选择题Which of the following is not a frontal term（）.

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

单项选择题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

单项选择题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

单项选择题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