首页
登录
职称英语
By the mid-nineteenth century, the term "icebox" had entered the American lan
By the mid-nineteenth century, the term "icebox" had entered the American lan
游客
2024-06-04
14
管理
问题
By the mid-nineteenth century, the term "icebox" had entered the American language, but ice was still only beginning to affect the diet of ordinary citizens in the United States. The ice trade grew with the growth of cities. Ice was used in hotels, taverns (酒馆), and hospitals, and by some forward-looking city dealers in fresh meat, fresh fish, and butter. After the Civil War (1861-1865), as ice was used to refrigerate freight cars, it also came into household use. Even before 1880, half of the ice sold in New York, Philadelphia, and Baltimore, and one-third of that sold in Boston and Chicago, went to families for their own use. This had become possible because a new household convenience, the icebox, a precursor of the modern fridge, had bean invented.
Making an efficient icebox was not as easy as we might now suppose. In the early nineteenth century, the knowledge of the physics of heat, which was essential to a science of refrigeration, was rudimentary (未发展的). The commonsense notion that the best icebox was one that prevented the ice from melting was of coarse mistaken, for it was the melting of the ice that performed the cooling. Nevertheless, early efforts to economize ice included wrapping up the ice in blankets, which kept the ice from doing its job. Not until near the end of the nineteenth century did inventors achieve the delicate balance of insulation and circulation needed for an efficient icebox.
"But as early as 1803, and ingenious Maryland farmer, Thomas Moore, had been on the right track. He owned a farm about twenty miles outside the city of Washington, for which the village of Georgetown was the market center. When he used an icebox of his own design to transport his butter to market, he found that customers would pass up the rapidly melting stuff in the tubs of his competitors to pay a premium price for his butter, still fresh and hard in neat, one-pound bricks. One advantage of his icebox, Moore explained, was that farmers would no longer have to travel to market at night in order to keep their produce cool. [br] What is the topic of the passage?
选项
答案
Icebox
解析
文章从头到尾都在讲icebox是如何产生的、其工作原理和优点,可见icebox是这篇文章的中心。
转载请注明原文地址:https://tihaiku.com/zcyy/3618920.html
相关试题推荐
Americanhighereducationstandsonthebrinkofchaos.Neverhavesomanys
Americanhighereducationstandsonthebrinkofchaos.Neverhavesomanys
Americanhighereducationstandsonthebrinkofchaos.Neverhavesomanys
Americanhighereducationstandsonthebrinkofchaos.Neverhavesomanys
Bythemid-nineteenthcentury,theterm"icebox"hadenteredtheAmericanlan
Bythemid-nineteenthcentury,theterm"icebox"hadenteredtheAmericanlan
Bythemid-nineteenthcentury,theterm"icebox"hadenteredtheAmericanlan
[originaltext]GoingonlineisafavoriterecreationformillionsofAmerican
[originaltext]GoingonlineisafavoriterecreationformillionsofAmerican
Forwelloveracentury,onestreetinNewYorkCityhasbeenknownforthe
随机试题
Readcarefullythefollowingexcerptonintelligentmachine,andthenwrite
[originaltext]Fivechildrenareamong11peoplewhodrownedafteramigrant
Educationis___________lifelongexperi
如果某证券的β值为1.5,若市场组合的风险收益为10%,则该证券的风险收益为(
小学社会《课堂作业认真做》 题目来源:5月18日北京市面试考题 试讲题目
A.po. B.ih. C.im. D.iV. E.舌下含化肝素常用的给
夜市上,一群人正在抢劫张某摊位上的东西,此时,张某打电话报警,但是公安局以人手不
有关财政指标,下列说法不正确的是()。A:收大于支是盈余,收不抵支则出现财政赤
关于完善中国特色社会主义法律体系,加强宪法实施。下列说法错误的有()。A.加强
从桥梁拱顶截面形心至相邻两拱脚截面形心连线的垂直距离称为()。A.净矢高
最新回复
(
0
)