单项选择题
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（）.
单项选择题 When observing a rapid rise in barometric pressure，you may expect（）.
单项选择题 When force of winds reaches 10-11 in Beaufort scale，we usually call such wind（）.