相关题目
The basic markings on runways used for VFR operations consist of runway direction numbers and （ ） markings.
The hotter the climate and the higher the airfield above sea level, the （ ） the runways have to be.
The preferred navigation equipment in ADS technology is（ ）.
The magnetic compass indicates the （ ） in which an aircraft is flying with respect to the magnetic north pole.
The operation frequency for SSR is in （ ）wave band.
The Meteorological information is not only obtained from （ ） weather reports but is also up-dated by （ ） reports from pilots.
In the United States, flight information service to flights not requiring ATC service is normally provided by flight service stations, （ ） some cases this service is also provided by aerodrome control towers. FSS accept（ ）, provide pre-flight briefing both as regards MET and AIS and provide normal FIS to aircraft in flight.
VHF communication frequency is （ ）.
The operation wave band for general long-range radar is （ ）.
Thermal thunderstorm is caused by （ ）.
