The controlled airspace in China is divided into _______.
A.four types, namely A, B, C, D
B.FIR, control area, RA, DA, PA
C.FIR, RA, DA, PA, airway and air line
D.civil control area, air force control area, RA, DA, PA
正确答案是A
The controlled airspace in China is divided into _______.
A.four types, namely A, B, C, D
B.FIR, control area, RA, DA, PA
C.FIR, RA, DA, PA, airway and air line
D.civil control area, air force control area, RA, DA, PA
正确答案是A