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
The idea of a vacuum cleaner originates from the 19th century. The first vacuum cleaners had to be operated manually. Two person
The idea of a vacuum cleaner originates from the 19th century. The first vacuum cleaners had to be operated manually. Two person
admin
2014-01-07
22
问题
The idea of a vacuum cleaner originates from the 19th century. The first vacuum cleaners had to be operated manually. Two persons were needed for this: one to operate the bellows and the other to move the mouthpiece over the floor. The dust was blown into the air.
On August 30th 1901 Hubert Cecil Booth, a British engineer, received a British patent for a vacuum cleaner. It took the form of a large, horse-drawn, petrol-driven unit which was parked outside the building to be cleaned with long hoses being fed through the windows.
Until then vacuum cleaners blew the dust away, but Booth came up with the idea of sucking away dust, instead of blowing. Furthermore Booth equipped his cleaner with a filter, which kept the dust in the machine. All modern vacuum cleaners are based on Booth’s principle.
As Hubert Booth, demonstrated his vacuuming device in a restaurant in 1901, two Americans introduced variations on the same theme. Corinne Dufour invented a device that sucked dust into a wet sponge. David E. Kenney’s huge machine was installed in the cellar and connected to a network of pipes leading to each room in the house. A corps of cleaners moved the machine from house to house.
In 1903 wealthy society ladies threw "vacuum cleaner parties". Guests sipped their tea and lifted their feet for Booth’s uniformed attendants to vacuum the carpet. After giving a vacuum demonstration at the Royal Mint, Booth, on leaving, was promptly stopped by the police. He had forgotten to empty the dust bag, which contained a large quantity of gold dust from the Mint.
In 1910 Professor Stanley Kent of University College, Bristol found 355,500,000 living organisms in just one gramme of dust extracted from Marlborough House, the home of HRH The Princess of Wales.
In 1907, James Murray Spangler, a janitor in a Canton, Ohio department store, deduced that the carpet sweeper he used was the source of his cough. He tinkered with an old fan motor and attached it to a soap box stapled to a broom handle. Using a pillow case as a dust collector on the contraption, Spangler invented a portable electric vacuum cleaner. He then improved his basic model the first to use both a cloth filter bag and cleaning attachments, and received a patent in 1908, and formed the Electric Suction Sweeper Company. One of the first buyers was a cousin, whose husband, William H. Hoover, later became the president of the Hoover Company, with Spangler as superintendent. Hoover’s improvements resembled a bagpipe attached to a cake box, but they worked. Sluggish sales were given a kick by Hoover’s 10 day, free home trial, and eventually there was a Hoover vacuum cleaner in nearly every home.
John Thurman started a horse drawn(door to door service)vacuum system in St. Louis, similar to Booth’s. His vacuuming services were priced at $4 per visit in 1903. He invented his gasoline powered vacuum cleaner, in 1899 and some historians consider it the first motorized vacuum cleaner. Thurman’s machine was patented on October 3, 1899(patent #634,042).
The author mentions the demonstration at the Royal Mint in order to illustrate that Booth’s vacuum cleaner
选项
A、amazed the upper class.
B、could work efficiently.
C、was once very popular.
D、needed improvement.
答案
B
解析
第5段提到了“吸尘器派对”和在皇家造币厂的展示,前者是为了说明Booth的吸尘器很受欢迎,第2句末尾的a large quantity of gold表明提及在皇家造币厂的展示是为了说明Booth的吸尘器工作效率很高,由此可见,本题应选B。
转载请注明原文地址:https://kaotiyun.com/show/33FK777K
0
专业英语四级
相关试题推荐
Accordingtothepassage,howmanypeopleintheworldcanNOTgetenoughfoodtobehealthy?
WhichofthefollowingscanNOTbelearnedfromthenewsitem?
Fromthebeginningofhumanhistory,information’stravellingspeeddidNOTrelyon______.
Thewomanwas______beforewhenexamswerecoming.
TheUKisthe______biggestinvestorinrenewableenergytechnologies.
Whatdidspacesatellitescapturerecently?
Whatisthepossiblerelationshipbetweenthespeakers?
Recently,CongressionalDemocratsintroducedlegislationtomakeiteasierforolderworkerstowinagediscriminationlawsuits.
Thereareanumberofmethodsofjoiningmetalarticlestogether,dependingonthetypeofmetalandthestrengthofthejointw
Since1895theNationalTrusthasworkedforthepreservationofplacesofhistoric(1)_____andnaturalbeautyinEngland,Wales
随机试题
多个相邻的毛囊及其所属皮质腺的急性化脓性感染,称为
男性,66岁,突发胸痛6小时未缓解,给予硝酸甘油和组织型纤溶酶原激活剂(t-PA)治疗,1天后患者病情稳定,但发现心尖部出现收缩期杂音,未及震颤,应怀疑下述哪种可能性最大( )早期容易引起急性肺水肿的是( )
长期应用广谱抗生素常引起二重感染的病原体是
下列各项中,不属于普济消毒饮组成药物的是()
神昏不清,声音粗壮有力,妄言乱语,语无伦次,称为郑声,多为心,气虚不养心神所致。()
利用重置价格折旧法评估建筑物价格,其基本公式为()。
背景资料某机电安装施工单位在沿海城市承建一座植物油厂,施工时间在5月~11月。该工程施工难度较大的是六条栈桥吊装,总重500多吨,分布在8m~30m标高的不同区域内。项目经理部制定吊装方案时,针对现场具体情况,结合本单位起重吊装经验,提出了采用全部吊车、
缺少鞍座的摩托车未组装件(排气量为500毫升,装在木箱内)
你怎样评价日本的明治维新?
Forthispart,youareallowed30minutestowriteashortessayonthefollowingtopic.Youshouldwriteatleast120wordsbut
最新回复
(
0
)