相关题目
Red on color weather radar denotes （ ） .
（ ） is the intersection of lines of reference, usually expressed in degrees /minutes /tenths of minutes of latitude and longitude, use to determine position or location.
（ ） is the speed of an aircraft relative to the surface of the earth.
（ ） is the direction in which the nose of the airplane points during flight.
（ ） is the vertical distance of a point or level, on or affixed to the surface of the earth, measured from Mean Sea Level.
（ ） is an altitude or flight level maintained during en-route level flight.
（ ） is the vertical distance of a level, a point or an object considered as a point, measured from Mean Sea Level.
（ ） is a control area or portion thereof established in the form of a corridor, the centerline of which is defined by radio navigational aids.
（ ） is navigable airspace between two points which is identifiable.
（ ） is a point on the airport designated as the official airport location.
