题目内容
An aircraft is _____ of several areas and structures that provide services for aircraft and passengers.
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An airport _____ is a building at an airport where passengers transfer between ground transportation and the facilities that allow them to board and disembark from aircraft.
Flight attendants may stand at the exits when passengers are boarding and _____ the aircraft.
Airport security provides defense by attempting to stop would-be _____ from bringing weapons or bombs into the airport.
A runway _____ is an incident where an unauthorized aircraft, vehicle or person is on a runway.
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