A.ship surveyor's report B.a ship's certificate C.a cargo inspection report D.a diver survey report
A.“四去三降一補”B.“三去一降一補”C.“三去二降—神”D.“四去一降一補”
A.高利潤區(qū)B.低利潤區(qū)C.趨于比較平緩的利潤