确保襟翼和缝翼是收上的
A.make sure that the flaps and the slats are retracted B.make sure that the slats and the ailerons are retracted C.make sure that the flaps and the elevators are extended正确答案A
确保襟翼和缝翼是收上的
A.make sure that the flaps and the slats are retracted B.make sure that the slats and the ailerons are retracted C.make sure that the flaps and the elevators are extended正确答案A