高涵道比涡轮风扇发动机常用（）表征发动机的推力。

The chord line and effective camber of the stabilizer are changed by deflection of the （ ） ．

Pitch movement about the lateral axis is produced by the （ ） ．

The （ ） controls yaw movement about the vertical axis.

Pitch is the movement of the aircraft about the （ ） axis.

（ ） is the movement of the aircraft about the longitudinal axis.

Which of the following statements is not true?

During the course of a flight, the （ ） will be a factor for the variation of the airplane’s weight.

Which of the following is not true?

Flaps increase lift by （ ） ．

Which word is not used in describing the shapes of the wing?