If the aircraft is above the glidepath， the（ ）depth of modulatio
2023-11-19导航专业业务
If the aircraft is above the glidepath， the（ ）depth of modulation predominates causing a downward deflection of the indicator pointer.
A.A、90-Hz
B.B、150-Hz
C.C、1020-Hz
D.D、90-Hz and 150-Hz
正确答案是A
