This is the minimum flight speed at which the airplane is directionally and laterally controllable. 这是飞机在方向和横向控制下的最小飞行速度。
A.This is the low limit of flight speed a t which the airplane can be controlled directionally and laterally. B.This is the upper limit of flight speed at which the aircraft is directionally and later ally controllable. C.This is the largest flight speed at which the airplane is directionally and laterally steerable.正确答案A
