A controller should pass ATC clearance to a pilot at the time _______.
A.when the A/C is taxing
B.before start up
C.after takeoff
D.before takeoff
正确答案是B
A controller should pass ATC clearance to a pilot at the time _______.
A.when the A/C is taxing
B.before start up
C.after takeoff
D.before takeoff
正确答案是B