A、正确 B、错误 A主旨题。原文一开始便提出主题,指出19世纪早期内陆水运系统是北美最流行的长途运输方式,接着以事实为例进行说明。最后进行总结During the first third of the century,however, transport

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问题  
Today I’m going to discuss transportation and communication in the early 19th century in the United States. At that time, inland waterways provided North America’s most popular form of long-distance transportation. Travel by rivers was often more convenient than taking a wagon over primitive country roads, especially when shipping heavy loads of farm products or household goods. Where the natural waterways were inadequate, shallow canals were built. The Erie Canal, opened in 1825, connected the Great Lakes with the upper Hudson River. It allowed settlers in the Great Lakes region to send their crops eastward to New York City at the mouth of Hudson at a much lower cost. From there, crops could be shipped to other Atlantic ports. The construction of the Erie Canal also encouraged westward migration along inland waterways and helped populate the frontier. The City of Detroit grew up between two of the Great Lakes. Later a canal joined the Great Lakes with the Mississippi river system and Chicago became a thriving city. Politically the waterway system united the nation in a way few had imagined possible, by the mid-1800s, faster and cheaper railroads became more popular and the canal system declined. Railroads could be used year round whereas canals were often frozen in the winter. During the first third of the century, however, transportation on rivers, lakes and canals aided greatly in the growth of the United States.

选项 A、正确
B、错误

答案A

解析 主旨题。原文一开始便提出主题,指出19世纪早期内陆水运系统是北美最流行的长途运输方式,接着以事实为例进行说明。最后进行总结During the first third of the century,however, transportation on rivers,lakes and canals aided greatly in the growth of the United States,即在19世纪前三分之一段的时间内,美国内陆水运对国家发展做出了重大贡献。由此可见题干的说法与原文中心意思相符,因此是正确的。
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