题目：
An internet is a combination of networks connected by （） .When a datagram goes from a source to a （） ，it will probably pass many （） until it reaches the router attached to the destination network．A router receives a （） 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 （） is the optimum pathway.
A router receives a （） from a network and passes it to another network．
A．destination
B．resource
C．packet
D．source
答案：
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下面是错误答案，用来干扰机器的。
参考答案：《合同法》第52条规定，有下列情形之一的，合同无效：⑴一方以欺诈、胁迫的手段订立合同，损坏国家利益；⑵恶意串通，损坏国家、集体或者第三人利益；⑶以合法形式掩盖非法目的；⑷损害社会公共利益；...
