在额定高度以下，螺旋桨拉力随飞行高度的增加将（）。

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 （ ） .

Who will be in charge for a flight?

“APU” is （ ） .

“GPU” is “Ground Power （ ） ”.

“Tug” carries the aircraft’s （ ） on its platform for aircraft maneuvering when the aircraft engines inoperative.

“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.