上海高考英语阅读冲刺训练附答案高考英语作文万能句子：解决办法万能句-天天高考网

今天天天高考网小编整理了上海高考英语阅读冲刺训练附答案高考英语作文万能句子：解决办法万能句相关信息，希望在这方面能够更好的帮助到考生及家长。

上海高考英语阅读冲刺训练附答案高考英语作文万能句子：解决办法万能句

上海高考英语阅读冲刺训练附答案

阅读理解在高考中一直占有相当大的比重，坚持英语阅读的训练是备考的关键。下面学习啦小编为大家带来上海高考英语阅读冲刺训练附答案，欢迎同学们阅读训练。

上海高考英语阅读冲刺训练原文

The railroad industry could not have grown as large as it did without steel. The first railswere made of iron. But iron rails were not strong enough to support heavy trains running athigh speed. Railroad officials wanted to replace them with steel rails because steel was ten orfifteen times stronger and lasted twenty times longer. Before the 1870‘s, however, steel was tooexpensive to be widely used. It was made by a slow and expensive process of heating, stirring,and reheating iron ore.

Then the inventor Henry Bessemer discovered that directing a blast of air at melted iron ina furnace(熔炉) would burn out the impurities(杂质)that made the iron brittle(易脆).As the airshot through the furnace, the bubbling metal would erupt(喷发)in showers of sparks. When thefire cooled, the metal had been changed, or converted, to steel. The Bessemer converter madepossible the mass production of steel. Now three to five tons of iron could be changed into steelin a matter of minutes.

Just when the demand for more and more steel developed, prospectors discovered hugenew deposits(矿床) of iron ore in the Mesabi Range, a 120-mile-long region in Minnesota nearLake Superior. The Mesabi deposits were so near the surface that they could be mined withsteam shovels.

Barges and steamers carried the iron ore through Lake Superior to deposits on thesouthern shores of Lake Michigan and Lake Erie. With dizzying speed Gary, Indiana and Toledo,Youngstown, and Cleveland, Ohio, became major steel manufacturing centers. Pittsburgh wasthe greatest steel city of all.