A、 longitudinally
B、 vertically
C、 by time
D、 one behind the other
答案:空
A、 longitudinally
B、 vertically
C、 by time
D、 one behind the other
答案:空
A. 1000
B. 1500
C. 2000
D. 3000
A. A7500
B. A7600
C. A7700
D. A, B and C
A. the call sign of the aircraft
B. nature of distress
C. present position, altitude and heading of the aircraft
D. all that above
B. say
C. go ahead
D. what do you want
A. proceed
B. way
C. proceeding
D. progress
A. 600
B. 400
C. 300
D. 350
A. aeronautical information amendment memoirs
B. airway modification notice
C. aeronautical information amendment notice
D. aeronautical information modification bulletin
A. niner zero niner niner Yankee
B. niner 0 niner niner Yankee
C. nine naught nine nine Yankee
D. nine thousand and ninety-nine Yankee
A. lightning
B. hail
C. birds
D. gravel