Main points of the text Outstanding disadvantages of air transport such as high cost of service,and limited carrying capacity. C The most important document in airtransport air waybill 贵价爱，所質易大孝Main points of the text Main points of the text Outstanding disadvantages of air Outstanding disadvantages of air transport such as high cost of transport such as high cost of service, and limited carrying service, and limited carrying capacity. capacity. B The most important document in The most important document in airtransport airtransport –air waybill air waybill C