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
24
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
ThisWednesday,GordonBrownwillreplaceTonyBlairasthenewheadofBrit
Businessmemoisfrequentlyusedincompanies.Itiscalledanintra-company
It’stemptingtospendslowworkdaysthisholidayseasonshoppingforgifts
关于计日工费下列说法中不正确的有( )。A.计日工的工程项目大多数属于辅助用工
供残疾人使用的出入口的规定,下列哪条不符合规定?()A.室内设有电梯时出入口
王小姐今年33岁,她办理的普通护照的有限期限为( )年。A.3 B.5 C
质粒的分子结构为A、单条环状双螺旋双链DNA(dsDNA) B、两条环状dsD
建设单位应当将大型的人员密集场所和其他特殊建筑工程的消防设计文件报送公安机关消防
2015年10月,某自治州人大常委会出台了一部《关于加强本州湿地保护与利用的决定
A.激活弹力纤维酶 B.激活磷脂酶A C.激活胰舒血管素 D.激活胰蛋白酶
最新回复
(
0
)