The rate of descent on the glide slope is dependent upon _______ .
A.true airspeed
B.indicated airspeed
C.groundspeed
D.calibrated airspeed
正确答案是C
The rate of descent on the glide slope is dependent upon _______ .
A.true airspeed
B.indicated airspeed
C.groundspeed
D.calibrated airspeed
正确答案是C