首页
登录
职称英语
The idea of a vacuum cleaner originates from the 19th century. The first vac
The idea of a vacuum cleaner originates from the 19th century. The first vac
游客
2024-10-04
40
管理
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). [br] 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:http://tihaiku.com/zcyy/3786423.html
相关试题推荐
Theideaofavacuumcleaneroriginatesfromthe19thcentury.Thefirstvac
Theideaofavacuumcleaneroriginatesfromthe19thcentury.Thefirstvac
Theideaofavacuumcleaneroriginatesfromthe19thcentury.Thefirstvac
Theideaofavacuumcleaneroriginatesfromthe19thcentury.Thefirstvac
Theideaofavacuumcleaneroriginatesfromthe19thcentury.Thefirstvac
Languagebelongstoeachmemberofthesociety,tothecleaner______tothepro
Slaverywas______inAmericainthe19thcentury.A、abolishedB、cancelledC、abando
随机试题
[img]2014m3s/ct_etoeiclm_etoeiclzp_0401_201331[/img][br][originaltext](A)They
Thecompanyfelt______atPresidentObama’scriticism.[originaltext]Thepr
TheopinionofmanyengineersisthatthearchitectsthatdesignedtheNewY
东宇大学公开招聘3个教师职位,哲学学院、管理学院和经济学院各一个。每个职位都有来
A.氯霉素 B.红霉素 C.青霉素 D.磺胺类 E.头孢氨苄百日咳首选抗
如果保证合同未约定保证期间或约定不明,并且债权人一直未要求保证人承担保证责任,那
苏苏是某殡仪馆的社会工作者,主要负责提供临终关怀服务,但最近接受督导时苏苏情绪低
在()下,经营者应按规定缴纳风险抵押金。风险抵押金原则上由本人用现金向主管部门一
正虚喘脱型喘证的治法宜选用 A.解表清里,化痰平喘 B.清热化痰,宣肺平喘
临时用电工程专用的电源中性点直接接地的220V/380V三相四线制低压电力系统,
最新回复
(
0
)