A.石油服務(wù)B.空中游覽C.海洋監(jiān)測(cè)D.人工降水
A.經(jīng)營(yíng)性質(zhì)B.經(jīng)營(yíng)項(xiàng)目C.隸屬關(guān)系D.以上都不對(duì)