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
Before the mid-nineteenth century, people in the United State eat most foods only in season. Drying, smoking, and salting could
Before the mid-nineteenth century, people in the United State eat most foods only in season. Drying, smoking, and salting could
admin
2012-06-18
69
问题
Before the mid-nineteenth century, people in the United State eat most foods only in season. Drying, smoking, and salting could preserve meat for a short time, but the availability of fresh meat, like that of fresh milk, was very limited. There was no way to prevent spoilage. But in 1810, a French inventor named Nicolas Appert developed the cooking-and-sealing process of canning. And in the 1850’s an American named Gail Borden developed a means of condensing and preserving milk. Canned goods and condensed milk became more common during the 1860’s, but supplies remained low because cans had to be made by hand. By 1880, however, inventors had fashioned stamping and soldering machines that mass-produced cans from tin-plate. Suddenly all kinds of food could be preserved and bought at all times of the year.
Other trends and inventions had also helped make it possible for Americans to vary their daily diets. Growing urban populations created demand that encouraged fruit and vegetable fanners to raise more produce. Railroad refrigerator car enabled growers and meat packers to ship perishables great distance and to preserve them for longer periods. Thus, by the 1890’s, northern city dwellers could enjoy southern and western strawberries, grapes and tomatoes, previously available for a month at most, for up to six month of the year. In addition, increased use of iceboxes enabled families to store perishables. An easy means of producing ice commercially had been invented in the 1870’s, and by 1900 the nation had more than two thousand commercial ice plants, most of which made home deliveries. The icebox became a fixture in most homes and remained so until the mechanized refrigerator replaced it in the 1920’s and 1930’s.
Almost every one now had a more diversified diet Some people continued to eat mainly foods that were heavy in starches or carbohydrates, and not everyone could afford meat Nevertheless, many families could take advantage of previously unavailable fruits, vegetables, and dairy products to achieve more varied fare.
What does the passage talk about mainly?
选项
A、Commercial production of ice.
B、Inventions that led to changes in the American diet
C、Causes of food spoilage.
D、Population movements in the 19th century.
答案
B
解析
可从文中的内容推知,即本文主要谈论的是各种发明导致了美国人饮食的变化。
转载请注明原文地址:https://kaotiyun.com/show/FwnO777K
0
考博英语
相关试题推荐
Youarerequiredtowriteacompositioninnolessthan220words.Youshouldwriterecordingtotheoutlinegivenbelow.1.
Title:TheFutureProsperityofOurCountryandthePeasantProblemOutline:A.Theencouragingeconomicsituationofourco
Inthepastfewyears,severalplagiarism(抄袭,剽窃)caseshavebeenexposedinChina;someinvolveprofessorsandfamousscholars
KevinRogersusedtobemyboss.Atthattimehewasahard-working,up-and-comingbusinessmanandarealslave-driver,always
TheUKgovernmenthassomewaytogoinbuildingtrustinitshandlingofgeneticmodificationinagriculture.Lessonslearn
TheUKgovernmenthassomewaytogoinbuildingtrustinitshandlingofgeneticmodificationinagriculture.Lessonslearn
Themostconvincingevidencefortheimportanceofadultinfluenceonachild’sintelligencecomesfromastudyof"atrisk"chi
Alaska’sTongassandChugachNationalForestsareAmerica’sfirstandsecondlargestnationalforests______.
Themarketformanufacturedgoodsiswhateconomistscall"imperfect,"becauseeachcompanyhasitsownstyle,itsownreputatio
TheUnitedNationsSecurityCouncilestablishedtheICTRin1995totrytheallegedperpetratorsofthe1994______inRwandath
随机试题
某油田2005年核实产油量为68×104t,2006年新井核实产油量6×104t,核实产量的综合递减率10.62%,年输差为6.5%。试计算2006年井口年产油量。
A、24小时B、16小时C、8小时D、4小时E、2小时二产程初产妇不得超过
引起相对传入性瞳孔障碍(RAPD)的眼病不包括
一台X线机带有2只X线管时,完成X线管切换的部件是
消化性溃疡并发上消化道出血的特点,不正确的是()
在一个研讨班上,学员对假劣药情形、使用法律和法律责任展开了讨论。讨论的情形主要包括四个,一是采用多加矫味剂生产儿童退热药;二是多加药用淀粉少用主药生产降压药;三是部分药品超过有效期;四是某抗菌药物的外包装上标示的适应症与批准的药品说明书中适应症表述不一致,
下列疾病常导致休克且休克不易纠正的疾病是()。
某桥梁工程项目的监理机构在某次质量检查中,对施工单位生产的某批构件进行全面检测,经检测,得出表2—2所示的统计数据。问题:根据检测结果,监理人员应如何分析在影响质量的这些因素中哪些是主要因素、次要因素和一般因素。
技术分析的理论基础是建立在()假设之上的。
Thesecreaturesaresotinythattheycannotalwaysbeseenwiththe______eye.
最新回复
(
0
)