（2009·上海，35）为了支持与鼓励高校毕业生创业，国家在贷款、税收等方面推出了多项优惠扶持政策。

（1）经济生活知识告诉我们，“就业”是指“具有劳动能力的公民在法定的劳动年龄之内依法从事某种有报酬的社会职业”。请参照就业概念，谈谈什么是创业。

（2）大学生创业对自己和社会有什么积极意义？

An internet is a combination of networks connected by (1).When a datagram goes from a source to a(2)，it will probably pass many (3)until it reaches the router attached to the destination network. A router receives a (4)from a network and passes it to another network. A router is usually attached to several networks. When it receives a packet, to which network should it pass the packet? The decision is based on optimization: Which of the available (5)is the optimum pathway?

空白（1）处应选择（）

A.modems

B.routers

C.switches

D.computers