第一节 阅读理解阅读下面的短文从每题所给的A、B、C和D项中选出最佳选项。(2015·湖南卷)In its early historycarts got stuck. An old joke that was popular at the time went something like this:A man is stuck up to his waist in a muddy Chicago street.Asked if he needs help, uild an underground drainage(排水)system, nvinced the city that it had no choice but to build the pipes above ground and then cover them with dirt. This raised the level of the city's streets by as much as 12 feet.
This of course created a new problem:dirt practically buried the first floors of every building in Chicago.Building owners were faced with a choice:either change the first floors of their buildings into basements, dframe buildings could be lifted fairly easily. But what about large, heavy structures like the Tremont Hotel,which was a sixstory brick building?
That's where George Pullman came in.He had developed some housemoving skills successfully.To lift a big structure like the Tremont Hotel,Pullman would place thousands of jackscrews (螺旋千斤顶)beneath the building's foundation.One man was assigned to operate each section of roughly 10 jackscrews.At Pullman's signal each man turned his jackscrew the same amount at the same time solution.But in Chicago's early history,every engineering solution seemed to create a new problem.Now that Chicago's waste water was draining efficiently into the Chicago River, the city's next step was to clean the polluted river.
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