The lowest VHF frequency of radio communication between air and ground is _______ .
A.118.00MHZ
B.118.1MHZ
C.117.5MHZ
D.117.0MHZ
正确答案是A
The lowest VHF frequency of radio communication between air and ground is _______ .
A.118.00MHZ
B.118.1MHZ
C.117.5MHZ
D.117.0MHZ
正确答案是A