What are the three major functions of the bill of lading?

What are the three major functions of the bill of lading?
【正确答案】：(1) It serves as a cargo receipt signed by the carrier and issued to the shipper or consignor. ( 2 ) It constitutes a contract of carriage between the carrier and the consignor. ( 3 ) It is a document of title to the goods, and the legal holder of the bill of lading is the owner of the goods it covers.