The major problem with E-mail is that it is (71) easy to use that people can become (72) with messages (73) they can possibly answer in a day. In addition, mail boxes require some management to (74) messages or archive those that might be required later. Senders don’t always know about your E-mail backlog and often send (75) messages.

A．full

B．lost

C．inundated

D．filled

以下不属于核单流程的是（）

A.接收回单

B.审核回单

C.考核流程

D.回单确认