The flight forecast information compiled by ARO should be promulgated not later than _______ hours on the day before the flight.
A.15
B.16
C.17
D.18
正确答案是B
The flight forecast information compiled by ARO should be promulgated not later than _______ hours on the day before the flight.
A.15
B.16
C.17
D.18
正确答案是B