相关题目
“Mobile belt conveyors” is a vehicle which can lift （ ） up to aircraft, and be raised at both ends.
Airport elevation is measured at the （ ） usable landing surface on the airport.
（ ） enables traffic to move to and from runways without interfering with aircraft taking off or landing.
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.
