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
2023-09-15
48
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 moat, 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 modem fridge, had been 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 course 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 travel to travel to market at night in order to keep their produce cool.
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/3017247.html
相关试题推荐
Bythemiddleofthe18thcentury,manydifferentkindsofProtestantslived
MasstransportationrevisedthesocialandeconomicfabricoftheAmericanc
Inthe17thcentury,awriterexplainedthetheoryaboutthefunctionoflaughte
Inthe17thcentury,awriterexplainedthetheoryaboutthefunctionoflaughte
Inthe17thcentury,awriterexplainedthetheoryaboutthefunctionoflaughte
Inthe17thcentury,awriterexplainedthetheoryaboutthefunctionoflaughte
[originaltext]Lifeinthetwentiethcenturymustdemandpreparations.Today
[originaltext]Lifeinthetwentiethcenturymustdemandpreparations.Today
AmericanopinionbegantochangesomewhatafterPresidentRoosevelt’s"quara
BillGatesbelievesthattheAmericanhighschoolsare"obsolete"in______.[br]
随机试题
Shelly’ssnackshopwasthenamethatBrianEgemoofBadger,Iowa,appliedt
Ofallthe【C1】______ofagoodnight’ssleep,dreamsseemtobeleastwithin
下列不属于辅币特点的是()。A.无限法偿 B.一般用较贱金属铸造 C.不可自
在欧洲评级体系—ARROW评级体系中,外部风险主要分析的内容包括()。A.
古代青铜器中铭文最长的是()A.毛公鼎 B.四羊方尊 C.莲鹤方壶 D
让人民享有健康丰富的精神文化生活是全面建设小康社会的重要内容。 材料一:某省
农产品销售渠道类型包括( )。A.生产者—消费者 B.生产者—零售商—消费者
政府指导和调控城乡建设发展的基本手段是( )。A.规划评估 B.城市总体规划
下列有关期权价值影响因素的表述中,正确的有()。A.无风险利率越高,会导致
适用水头为1-25m,是低水头、大流量水电站的一种专用机型的水轮机是()。A.
最新回复
(
0
)