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（2）
Some historian say that the most important contribution of Dwight Eisenhower's presidency (总统任期) in the 1950s was the U.S. interstate highway system. It was a massive project, easily surpassing the scale of such previous human 【__1__】as the Panama Canal. Eisenhower's interstate highways 【__2__】 the nation together in new ways and 【__3__】 major economic growth by making commerce less 【__4__】. Today, an information superhighway has been built-an electronic network that 【__5__】 libraries, corporations, government agencies and individuals. This electronic superhighway is called the Internet, 【__6__】 it is the backbone (主干) of the World Wide Web.
The Internet had its 【__7__ 】in a 1969 U.S. Defense Department computer network called Arpanet, which 【__8__】 Advanced Research Projects Agency Network. The Pentagon built the network for military contractors and universities doing military research to 【__9__】 information. In 1983 the National Science Foundation (NSF), 【__10__】 mission is to promote science, took over.
This new NSF network attracted more and more institutional users, many of 【__11__ 】had their own internal networks. For example, most universities that 【__12__】 the NSF network had intercampus computer networks. The NSF network then became a connector for thousands of other networks. 【__13__ 】a backbone system that interconnects networks, internet was a name that fit.
So we can see that the Internet is the wired infrastructure (基础设施) on which web 【__14__ 】move. It began as a military communication system, which expanded into a government-funded 【__15__】 research network.
Today, the Internet is a user-financed system tying intuitions of many sorts together into an "information superhighway."
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