首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
专升本
The railroad industry could not have grown as large as it did without steel. The first rails were made of iron. But iron rails w
The railroad industry could not have grown as large as it did without steel. The first rails were made of iron. But iron rails w
admin
2011-04-26
50
问题
The railroad industry could not have grown as large as it did without steel. The first rails were made of iron. But iron rails were not strong enough to support heavy trains running at high speeds. Railroad executives wanted to replace them with steel rails because steel was ten or fifteen times stronger and lasted twenty times longer. Before the 1870’s, however, steel was too expensive 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 in a furnace would burn out the impurities that made the iron brittle. As the air shot through the furnace, the bubbling metal would erupt in showers of sparks. When the fire cooled, the metal had been changed, or converted to steel. The Bessemer converter made possible the mass production of steel. Now three to five tons of iron could be changed into steel in a matter of minutes.
Just when the demand for more and more steel developed, prospectors discovered huge new deposits of iron ore in the Mesabi Range, a 120 long region in Minnesota near Lake Superior. The Mesabi deposits were so near the surface that they could be mined with steam shovels.
Barges and steamers carried the iron ore through Lake Superior to depots on the southern shores of Lake Michigan and Lake Erie. With dizzying speed Gary, Indiana, and Toledo, Youngstown, and Cleveland, Ohio, became major steel manufacturing centers. Pittsburgh was the greatest steel city of ail.
Steel was the basic building material of the industrial age. Production skyrocketed from seventy seven thousand tons in 1870 to over eleven million tons in 1900.
According to the passage, where were large deposits of iron uncovered?
选项
A、In Pittsburgh.
B、In the Mesabi Range.
C、Near Lake Michigan.
D、Near Lake Erie.
答案
B
解析
根据第三段中的prospectors discovered huge new deposits of iron ore in the Mesabi Range“勘探者在Mesabi Range发现了丰富的铁矿”,可判断正确答案为B。
转载请注明原文地址:https://kaotiyun.com/show/4xqC777K
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
Shedidnotwanttosharetheroomwithherbrotherbecauseshecouldnot______hisbadhabits.
Wouldyoube______kindastostepthiswayplease?
Theheadmasteroftheschoolhadthesupportofa______numberofparents.
Thepriceofaluminumwassharplyreducedwhenpeoplediscoveredanewrefiningprocesswiththeaidof______.Whatisthepas
Mostmenandwomenpass【B1】lifewithouteverconsideringorcriticizing【B2】theirownconditionsorthoseoftheworldatlar
SimonHarperwritesfromtheviewpointofsomeonewho______.MagdalenaSmiththinksitisimportantfor______.
It’sabouttimeyou______alittlelessmoney.
Hisdescriptionoftheghostwasso______.thathislittledaughterscreamedwhenhecametothepartofkilling.
Whatapitythattheydidn’trealizetheentireeventhadbeenarrangedfortheir______(convenient).
Wedecidedto______rosesinthefrontgarden.
随机试题
中国古代绘画史上被人们称为“百代画圣”的画家是()。
根据以下情境材料。回答下列问题。某市境内国道、公路、城际快速通道、运煤专线等交通干线纵横交叉,近期致人死亡的交通事故频发。为深入剖析此类事故高发的原因,寻找有针对性的治理对策,市公安局汇总了2016-2017年该类警情的数据,制作了如下的分析报告。
提出“有意味的形式说”的美学家是【】
低位急性小肠梗阻的全身变化不包括
男性,65岁,肝癌肝叶切除术后第1天,病人感腹痛、心慌、气促、出冷汗,血压12/8kPa,首先应考虑为
A.青蒿鳖甲汤B.菌陈蒿汤C.蒿芩清胆汤D.四逆散E.半夏泻心汤清胆利湿,和胃化痰的方剂是
在可变分区分配方案中,把空闲分区表中的空闲分区以容量递增或递减的顺序排列,适合于()。
A:HowaboutthefoodIordered?I’vebeenwaitingfornearlytwentyminutes.B:Sorry.______
根据我国法律规定,有权提名国家主席、副主席人选的是()(20ll年一综一第26题)
A、Bytakingacoupleofsecondstocatchaglimpseofnewsreport.B、Bystartingoffonabrighttoneonastoryandthenchange
最新回复
(
0
)