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问题 单项选择题

MRPⅡ将企业中的各个子系统有机结合起来，形成一个全面生产管理的集成优化管理系统，其中( )和财务两个子系统的关系尤为密切。

A．生产

B．销售

C．运输

D．研发

答案

参考答案：A

填空题

“x与y的差”用代数式可以表示为 ▲ .
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单项选择题

In the following essay, each blank has four choices. Choose the most suitable one from the four choices and write down in the answer sheet.
A socket is basically an end point of a communication link between two applications. Sockets that extend over a network connect two or more applications running on (31) computers attached to the net-work. A socket (32) two addresses: (33) . Sockets provide a (34) communication channel between one or more systems. There are (35) sockets separately using TCP and UDP.

A．message and packet

B．packet and frame

C．stream and datagram

D．flow and block
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