The primary flight controls consist of the ________ailerons(副翼), elevators, and ________(方向舵).
A.flap, rudder
B.slat,rudder
C.ailerons, tail
D.ailerons,rudder
正确答案是D
The primary flight controls consist of the ________ailerons(副翼), elevators, and ________(方向舵).
A.flap, rudder
B.slat,rudder
C.ailerons, tail
D.ailerons,rudder
正确答案是D