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
外语
By the mid-nineteenth century, the term "icebox" had entered the American language, but ice was still only beginning to affect t
By the mid-nineteenth century, the term "icebox" had entered the American language, but ice was still only beginning to affect t
admin
2010-04-12
68
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, and hospitals, and by some forward-looking city dealers in fresh meat, fresh fish, and butter. After the Civil War (1860--1865), as ice was used to refrigerate fish in freight cars, it also came into household use. Even before 1880, half the ice sold in New York, Philadelphia, and Baltimore went to families for their own use. This had become possible because a new household convenience, the icebox, a precursor (先驱) of the modem refrigerator, 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. 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 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, an 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.
What does the passage mainly discuss?
选项
A、The influence of ice on the diet.
B、The development of refrigeration.
C、The transportation of goods to market.
D、Sources of ice in the nineteenth century.
答案
B
解析
文章的主题是冰箱如何产生的。因此,正确答案是B项。
转载请注明原文地址:https://kaotiyun.com/show/Cqj7777K
0
大学英语四级
相关试题推荐
Beforethe20thcenturythehorseprovideddaytodaytransportationintheUnitedStates.Trainswereusedonlyforlong-distan
Researchershaveestablishedthatwhenpeoplearementallyengaged,biochemicalchangesoccurinthebrainthatallowittoact
A、Hecamelatebecausehehadnomoneyfortaxifee.B、Hefailedtocomeontimebecauseoftrafficjam.C、Hefailedtogiveas
A、Fromhisfriend.B、Fromhisneighbor.C、Fromhisroommate.D、Fromasponsorofthemovie.A对话中直接提到“Hewasabletogetthetick
A、Library.B、Bookstore.C、Computer.D、Tutor’soffice.A根据对话中“Whataboutthelibrary?”可以判断此题答案为A
Itishardtobelievethatpeoplecandescribevividlythingsthattheyhave【M1】______neverseenorexperienced.However,
A、Fiveminutes.B、15hours~C、Fivehours.D、15minutes~C根据“Ittookthemfivehours”,可知答案是C
Itisthedutyofallthecitizensthat______(应该保护森林,使其免受破坏和污染).
A、Thereare200vehiclesforeverykilometerofroadway.B、Ithasadensepopulation.C、Therearemanymuseumsandpalaces.D、It
A、Sheworksinalawoffice.B、Sheworksforanansweringservice.C、Sheworksatanemploymentagency.D、Sheisateacher.C
随机试题
不属于屏/片体系产生模糊的因素是
股票市场的投资者分为()和机构投资者。
建设工程监理文件资料的卷内文件排列方法不包括()。
围护结构类型中,板桩式围护结构包括()。
由主管部门制定工程预算定额.并且规定间接费的内容和取费标准的计价模式是()。
我国银行监管模式是( )。银行监管的原则包括( )。
甲与乙婚后购买一套房屋,产权证载明所有权人为乙。后双方协议离婚,约定房屋赠与女儿,甲可以居住房屋至女儿满18岁,但未办理房屋所有权转移登记。不久,乙与丙签订抵押借款协议,将房屋抵押给丙,2011年10月8日丙取得房产局发放的房屋他项权利证书。2012年11
在进行社会主义改造、向社会主义过渡的进程中,中国共产党积累了丰富的历史经验,其中包括()
已知
Chemistryisthestudyofthebehaviorandcompositionofmatter.Allfoodsaremadeupofchemicalsubstancewhichundergoesch
最新回复
(
0
)