Introduction. Epiglottitis is inflammation and swelling of the epiglottis. In most cases, it's caused by infection. The epiglottis is a flap of tissue that sits beneath the tongue at the back of the throat.Its main function is to close over the windpipe (trachea) while you're eating, to prevent food entering your airways.he epiglottis is a flap of tissue that sits beneath the tongue at the back of the throat. Its main function is to close over the windpipe (trachea) while you're eating, to prevent food entering your airways.
Airport authority. An airport authority is an independent entity charged with the operation and oversight of an airport or group of airports. These authorities are often governed by a group of airport commissioners, who are appointed to lead the authority by a government official. When the authority of an entity encompasses more than just the airports in an area, harbor and rail facilities for example, the entity may be referred to as a port authority. In Canada, airport authorities usually refer to private (not government owned or affiliated) not-for-profit companies that are established to manage a city's commercial airports.
As the aviation authority responsible for China, it concludes civil aviation agreements with other aviation authorities, including those of the Special Administrative Regions of the People's Republic of China which are categorized as special domestic. The agency is headquartered in Dongcheng District, Beijing.