GS is installed on _______ .
A.one side of the beginning of runway
B.one side of the end of runway
C.one side of the midpoint of runway
D.the centerline of runway
正确答案是A
GS is installed on _______ .
A.one side of the beginning of runway
B.one side of the end of runway
C.one side of the midpoint of runway
D.the centerline of runway
正确答案是A