The design maneuvering speed (Va) is an important airspeed related to _______.
A.load factors
B.ground speed
C.stall speed
D.both A and C
正确答案是D
The design maneuvering speed (Va) is an important airspeed related to _______.
A.load factors
B.ground speed
C.stall speed
D.both A and C
正确答案是D