When judging the wing speed by wind sock, if the wind sock is at aclinic level, then the wind speed can be up to_______m/s.
A.42130
B.42289
C.15-20
D.20-25
正确答案是B
When judging the wing speed by wind sock, if the wind sock is at aclinic level, then the wind speed can be up to_______m/s.
A.42130
B.42289
C.15-20
D.20-25
正确答案是B