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 human1 as the Panama Canal. Eisenhower's interstate highways 2 the nation together in new ways and 3 major economic growth by making commerce less4 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, may 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."
1. A. behaviors B. endeavors C. inventions D. elements
2. A. packed B. stuck C. suppressed D. bound
3. A. facilitated B. modified C. mobilized D. terminated
4. A. competitive B. comparative C. exclusive D. expensive
5. A. merges B. connects C. relays D. unifies
6. A. and B. yet C. or D. while
7. A. samples B. sources C. origins D. precedents
8. A. stood by B. stood for C. stood against D. stood over
9. A. exchange B. bypass C. switch D. interact
10. A. their B. that C. when D. whose
11. A. what B. which C. these D. them
12. A. joined B. attached C. participated D. involved
13. A. With B. By C. In D. As
14. A. contexts B. signs C. messages D. leaflets
15. A. citizen B. civilian C. amateur D. resident
答案:
1-5 BDACB
6-10 ACBAD
11-15 BADCB
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