_______ is the vertical distance of a point or level, on or affixed to the surface of the earth, measured from Mean Sea Level.
A.QNH
B.QFE
C.Height
D.Elevation
正确答案是D
_______ is the vertical distance of a point or level, on or affixed to the surface of the earth, measured from Mean Sea Level.
A.QNH
B.QFE
C.Height
D.Elevation
正确答案是D