______ is an organization of some 80 governments joined to promote civil aviation on a worldwide scale.
A.IATA
B.ICAO
C.OECD
D.WTO
正确答案是B
______ is an organization of some 80 governments joined to promote civil aviation on a worldwide scale.
A.IATA
B.ICAO
C.OECD
D.WTO
正确答案是B