飞机在对流层内做等表速爬升时，随高度增加，飞机的真空速将（）。

“（ ）” means visibility, cloud and present weather better than prescribed values or conditions.

“（ ）” is the height above the ground or water of the base of the lowest layer of cloud below 6000m covering more than half sky.

“AFP” is a kind of flight plan which means （ ） .

“UTC” means “（ ）”.

“AFTN” means “（ ）”.

“AIP” is “（ ）”.

An air show may with the consent of the （ ） be the reason for an aerodrome being closed to all traffic for a few hours.

The longest duration of SNOWTAM is （ ） .

“VMC” means “（ ）”.

We call the man who will be in charge for the whole affairs of airliners in the Airport station as （ ） .