Some historians 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 【B1】 project, easily surpassing the scale of such previous human 【B2】 as the Panama Canal. Eisenhower's interstate highways 【B3】 the nation together in new ways and 【B4】 major economic growth by making commerce less—【B5】 . Today, an information superhighway has been built—an electronic network that 【B6】 libraries, corporations, government agencies and 【B7】 . This electronic superhighway is called the Internet, 【B8】 it is the backbone (主干)of the World Wide Web.

The Internet had its 【B9】 in a 1969 U. S. Defense Department computer network called ARPA net, which 【B10】 Advanced Research Projects Agency Network. The Pentagon built the network for military contractors and universities doing military research to 【B11】 information. In 1983 the National Science Foundation (NSF) , 【B12】 mission is to promote science, took over.

This new NSF network 【B13】 more and more institutional users, many of 【B14】 had their own internal networks. For example, most universities that 【B15】 the NSF network had intercampus computer networks. The NSF network 【B16】 became a connector for thousands of other networks. 【B17】 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 【B18】 move. It began as a military communication system, which expanded into a government-funded 【B19】 research network.

Today, the Internet is a user-founded system tying institutions of many sorts together 【B20】 an "information superhighway."

【B1】

A．concise

B．radical

C．massive

D．trivial