下列有机反应的产物中不可能存在同分异构体的是(   )

A．CH₃CH=CH₂与HCl加成

B．CH₃CH₂CH₂Cl在碱性溶液中水解

C．CH₂=CH—CH=CH₂与H₂按物质的量之比为1﹕1进行反应

D．与NaOH的醇溶液共热

The basic functions of a bill of lading is (are)（ ）.

A．a receipt for the goods which evidences the taking-over or loading by the carrier

B．an evidence of contract of carriage between the carrier and the shipper.

C．a document of title to goods.

D．All of the above.