The level scope for A and B class airspace is _______.
A.from ground to 12000m
B.from 6600m to 12000m
C.from 6000m to 12000m
D.the space above the minimum flight levels
正确答案是D
The level scope for A and B class airspace is _______.
A.from ground to 12000m
B.from 6600m to 12000m
C.from 6000m to 12000m
D.the space above the minimum flight levels
正确答案是D