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
2023-06-20
11
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://www.tihaiku.com/zcyy/2768491.html
相关试题推荐
Peoplewholiveinheavilyindustrializedareasdonotgetasmuchsunlight
Peoplewholiveinheavilyindustrializedareasdonotgetasmuchsunlight
Peoplewholiveinheavilyindustrializedareasdonotgetasmuchsunlight
Peoplewholiveinheavilyindustrializedareasdonotgetasmuchsunlight
Peoplewholiveinheavilyindustrializedareasdonotgetasmuchsunlight
Peoplewholiveinheavilyindustrializedareasdonotgetasmuchsunlight
Peoplewholiveinheavilyindustrializedareasdonotgetasmuchsunlight
Howdidtheearlypeopledotheircounting?Atfirst,theydidalltheircou
Howdidtheearlypeopledotheircounting?Atfirst,theydidalltheircou
Howdidtheearlypeopledotheircounting?Atfirst,theydidalltheircou
随机试题
若分出公司自留额是40万元,保险金额200万元,保险费10万元,赔款120万元,
A. B. C. D.
支配鼻腔的神经有( )A.嗅神经、自主神经 B.嗅神经、感觉神经 C.自主神
患者35周妊娠,食欲不振,伴恶心呕吐一周。查体:T:36.6℃,P:96次/分
根据X线片表现,最不稳定的骨折是A.粉碎性骨折 B.嵌插骨折 C.青枝骨折
交易所交易衍生工具是指在有组织的交易所上市交易的衍生工具,下列各项属于这类交易衍
2012年上半年,内地对台湾地区进出口总值为()亿美元。 A.125.5
男,27岁。左下后牙牙龈反复肿胀疼痛3个月,检查:缺失,近中倾斜,间邻面接触关系
关于商品房促销方式中人员促销的说法,错误的是()。A、人员促销不利于销售方式的调
甲、乙国有企业与另外9家国有企业拟共同投资设立“光中有限责任公司”(以下简称“光
最新回复
(
0
)