螺旋桨有效功率随飞行速度的变化规律是，在小于某一速度的范围内，随速度的增大而（），大于某一速度的范围内，随飞行速度的增大而（）。

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.

The basic markings on runways used for VFR operations consist of runway direction numbers and （ ） markings.

The hotter the climate and the higher the airfield above sea level, the （ ） the runways have to be.

The preferred navigation equipment in ADS technology is（ ）.