首页
登录
职称英语
Until the invention of the modern washing machine, most people washed their
Until the invention of the modern washing machine, most people washed their
游客
2023-07-06
37
管理
问题
Until the invention of the modern washing machine, most people washed their clothes by hand. In the 20th century, however, washing machine became common, and washing clothes became much easier. Washing machines, though, have some serious disadvantages. One is that they need a great deal of clean water. Another is that, in many countries, hot water is used in the machines. This consumes a lot of energy. In the United Kingdom, for example, about one-third of household energy is used for heating water, including that used to wash clothes.
Now, a British company has invented a washing machine that solves these problems by using small plastic beads to absorb dirt and clean the clothes. First, a little water is added to the clothes to get them wet. Then, the beads are mixed with the clothes until they have taken away all the dirt and stains. When the process is over, the little beads are removed by the machine, and the clothes are left almost dry. Because the beads can be used over and over, the machine costs very little to operate.
The new machine is based on the research of Stephen Burkinshaw, a chemist at the University of Leeds in the U.K. For a long time, Burkinshaw has been studying ways to make plastic materials a different color. A few years ago, he noticed that many kinds of plastic, especially nylon, attract dirt in warm and wet conditions, the surface of the nylon remains clean. For this reason, beads made of nylon can be used repeatedly until they are completely full of dirt.
The new washing machine can save households a great deal of the money they spend on water and energy. At the same time, the machines are very good for the environment. The United States, for example, uses 1.25 billion metric tons of water on washing clothes every year. If the new machines were adopted there, 90 percent of this water could be saved. The saving of electricity, meanwhile, would help decrease the amount of carbon dioxide produced by power plants. For these reasons, the company is hoping that its new "waterless" washing machines will be widely used in the future. [br] What did Stephen Burkinshaw learn about nylon?
选项
A、It absorbs dirt from other objects in certain conditions.
B、It causes other plastic objects to stick to wet clothes.
C、It can be made into clothes that can be washed very easily.
D、It changes color when it comes into contact with dirty clothes.
答案
A
解析
细节题。文章第三段指出…nylon,attract dirt in warm and wet conditions…故答案为A。
转载请注明原文地址:https://tihaiku.com/zcyy/2811805.html
相关试题推荐
Whenyourfamilywantstobuyorreplaceacar,atelevision,orawashingm
Whenyourfamilywantstobuyorreplaceacar,atelevision,orawashingm
Whenyourfamilywantstobuyorreplaceacar,atelevision,orawashingm
[originaltext]Mostpeoplefeellonelysometimes,butitusuallyonlylasts
[originaltext]Mostpeoplefeellonelysometimes,butitusuallyonlylasts
[originaltext]Shypeopleoftenavoidsituationsthatforceclosecontactwi
Volumeshavebeenwrittenabouttechnology’sabilitytoconnectpeople.But
Volumeshavebeenwrittenabouttechnology’sabilitytoconnectpeople.But
Volumeshavebeenwrittenabouttechnology’sabilitytoconnectpeople.But
[originaltext]Withgrowingnumbersofpeoplelivingalone,eitherbychoice
随机试题
Whetheryouthinkyouneeddaytimerestornot,pickingupanap(午睡)habitis
Again,notetheuseoffigurativelanguage,inthiscasethesimileofthedr
FormostpeopleatripacrossEuropeancontinentisachancetoseethesigh
公路水运工程试验检测机构等级评定工作分为()。A.受理 B.资格审查 C.
银行对某企业提供的抵押物评估价值额为1000万元,拟向该企业贷款本息总额为800
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
通过员工的自我评价收集信息可运用的方法有()。A.写自传 B.志向和兴趣调查
下面关于已获利息倍数的计算公式,正确的是()。A:已获利息倍数=主营业务收入净额
(2021年真题)根据企业所得税法律制度的规定,下列各项中,在计算企业所得税应纳
男性,68岁。近2周来多饮,多尿,食欲减退,精神差,软弱无力。今晨发现神志不清而
最新回复
(
0
)