按照CDFA的下降剖面，可持续下降到距跑道头多少英尺高度？According to the descend path of CDFA,the aircraft can continuously descend to which height above the threshold？
A.50ft
B.15ft
C.35ft
正确答案是A
按照CDFA的下降剖面，可持续下降到距跑道头多少英尺高度？According to the descend path of CDFA,the aircraft can continuously descend to which height above the threshold？
A.50ft
B.15ft
C.35ft
正确答案是A