The maximum width of an air route within the territory of the People’s Republic of China is _______ km and the minimum width is 8KM.
A.10
B.20
C.25
D.50
正确答案是B
The maximum width of an air route within the territory of the People’s Republic of China is _______ km and the minimum width is 8KM.
A.10
B.20
C.25
D.50
正确答案是B