SIGMETS are issued as a warning of weather conditions potentially hazardous _______ .
A.particularly to light aircraft
B.to all aircraft
C.only to light aircraft operations
D.mainly to large aircraft
正确答案是B
SIGMETS are issued as a warning of weather conditions potentially hazardous _______ .
A.particularly to light aircraft
B.to all aircraft
C.only to light aircraft operations
D.mainly to large aircraft
正确答案是B