ATIS is broadcast continuously and updated _______ .
A.whenever any official weather is received, regardless of content change
B.whenever airport conditions change
C.whenever the pilot or controller requests
D.both A and B
正确答案是D
ATIS is broadcast continuously and updated _______ .
A.whenever any official weather is received, regardless of content change
B.whenever airport conditions change
C.whenever the pilot or controller requests
D.both A and B
正确答案是D