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  3. Some historians say that the most important contribution of Dwight Eisenhower’s presidency in the 1950s was the U.S. interstate

Some historians say that the most important contribution of Dwight Eisenhower’s presidency in the 1950s was the U.S. interstate

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问题     Some historians say that the most important contribution of Dwight Eisenhower’s presidency 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 of the World Wide Web.
    The Internet had its【B9】______in a 1643 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 1662 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 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-financed system tying institutions of many sorts together【B20】______an "information superhighway".
【B5】
选项 A、competitive
B、comparative
C、exclusive
D、expensive
答案C
解析 考查形容词辨析。competitive意为“指(人)好竞争的，求胜心切的；(价格等)有竞争力的”；comparative意为“比较的，相比之下的，相对的”；exclusive意为“排他的，独占的；高级的，奢华的；专用的，独家的”；expensive意为“昂贵的”。根据句意，高速公路把整个国家结合在一起，可得知各个州之间的经济联系随之加强，也就打破了原来各地商业经济的独占性，因此正确答案为C．exclusive。
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