填空题 Put the antenna through the top of the slots.

填空题 Put the container below the drain valve.

填空题 To prevent unwanted friction, polish the surface.

填空题 A modular engine construction is used on all modern aircraft.

填空题 Examine the bottom skin panels of the fuselage for cracks.

填空题 Write only one instruction in each sentence unless two or more actions occur at the same time.

填空题 Navigation system information is displayed on the primary flight displays

填空题 Airworthiness Directive is procedure that must be used when performing maintenance on an aircraft.

填空题 Examine all components, hydraulic fittings and connecting lines.