_______ is an area of defined dimensions within which the military training activities conducted, though not hazardous, are of interest to non-participating pilots.
A.V-area
B.Hazardous point
C.Danger area
D.Caution area
正确答案是D
_______ is an area of defined dimensions within which the military training activities conducted, though not hazardous, are of interest to non-participating pilots.
A.V-area
B.Hazardous point
C.Danger area
D.Caution area
正确答案是D