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  3. The Internet is an international collection of computer networks that all understand a standard system of addresses and commands

The Internet is an international collection of computer networks that all understand a standard system of addresses and commands

admin2012-12-26  43
问题     The Internet is an international collection of computer networks that all understand a standard system of addresses and commands, connected together through backbone(中枢) systems. It was started in 1969, when the U.S. Department of Defense【1】a nationwide network to connect a handful of universities and contractors (订约人). The【2】idea was to increase computing capacity that could be shared by users in many locations and to find out what it would take for computer networks to【3】a nuclear war or other disasters by providing multiple paths between users. People on the ARPNET (as this nationwide network was originally called) quickly discovered that they could exchange messages and conduct electronic "conferences" with distant colleagues for【4】that had nothing to do with the military industrial complex. If somebody else had something interesting【5】on their computer, it was a simple matter to obtain a copy (assuming the owner did not protect it).
    Over the years, additional networks joined which added【6】to more and more computers. The first international connections, to Norway and England, were added in 1973. Today thousands of networks and millions of computers are connected to the Internet. It is growing so quickly that nobody can say【7】how many users "on the Net".
    The Internet is the largest repository (知识库) of information which can provide very large network resources. The network resources can be【8】into network facilities resources and network information resources. The network facilities resources provide us the ability of【9】computation and communication. The network information resources provides us all kinds of information【10】, such as science, education, business, history, law, art, and entertainment, etc.
A. access B. original C. divided D. survive
E. debates F. established G. purposes H. genuine
I. exactly J. remote K. possibility L. stored
M. totally N. services O. maintain
【7】
选项
答案I
解析 此处需要副词。根据so quickly和how many可得出答案为exactly(准确地)。
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