题目
题型:不详难度:来源:
E
Windows not only let light in to cut down an electricity use for lighting, but the light coming through the window also provides heat. However, windows are not something people typically associate with being a cutting edge technology. Researchers are now working on new technologies that enable a window to quickly change from clear to dark and anywhere in between with a turn of a switch.
“It took us a long time to figure out what a window really is,” says Claes Granqvist, a professor of solid—state physics at Uppsala University in Sweden.“It’s contact with the outside world. You have to have visual contact with the surrounding world to feel well.” So, windows and natural light are important for improving the way people feel when they’re stuck indoors.
Yet, windows are the weak link in a building when it comes to energy and temperature control. In the winter, cold air leaks in. When it’s hot and sunny, sunlight streams in. All of this sunlight carries lots of heat and energy. And all of this extra heat forces people to turn on their air conditioners. Producing cold air, which can feel so refreshing, actually suck up enormous amounts of electricity in buildings around the world.
Windows have been a major focus of energy research for a long time. Over the years, scientists have come up with a variety of strategies for coating, glazing, and layering windows to make them more energy efficient. Smart windows go a step further. They use some technologies involving changes of color.
Electrochromic windows use electricity to change color. For example, a sheet of glass coated with thin layers(层) of tungsten oxide(氧化钨) works a bit like a battery. Tungsten oxide is clear when an electric charge is applied and dark when the charge is removed, that is, when the amount of voltage(电压) is decreased, the window darkens until it’s completely dark after all electricity is taken away. So applying a voltage determines whether the window looks clear or dark.
One important feature that makes a smart window so smart is that it has a sort of “memory”. All it takes is a small shock of voltage to turn the window from one state to the other. Then, it stays that way. Transitions take from 10 seconds to a few minutes, depending on the size of the window. The development of smart windows could mean that massive air conditioning systems may no longer need.“In the future,” Granqvist says,“our buildings may look different.”
67.Which statement does not indicate the importance of windows as described in the first two paragraphs?
A.Windows can change from clear to dark to save energy.
B.Windows help to save energy by letting light in.
C.Windows help to save energy by providing heat.
D.Windows enable people to have contact with the outside world.
68.According to the passage, smart windows are windows_______.
A.that are coated B.that use electricity
C.the color of which can be changed D.that have many layers
69.To make electrochromic windows change color, what is applied to the window glass?
A.Electricity. B.Tungsten oxide. C.A battery. D.A voltage.
70.What will be the benefit if the research on smart windows turns out to be successful?
A.The buildings will look different.
B.Windows can be as large as you want.
C.We may not need air conditioners any more.
D.They are less expensive than traditional windows.
答案
67---70 ACBC
解析
核心考点
试题【EWindows not only let light in to cut down an electricity use for lighting, but 】;主要考察你对题材分类等知识点的理解。[详细]
举一反三
Long ago, operation had usually to be done while the sick man could feel everything. The sick man had to be held down on a table by force while the doctors did their best for him. He could feel all the pain if his leg or arm was being cut off, and his fearful cries filled the room and the hearts of those who watched.
Soon after 1770, Josept Priestley discovered a gas which is now called “laughing gas”.Laughing gas became known in America.Young men and women went to parties to try it. Most of them spent their time laughing,but one man at a party,Horace Wells,noticed that people didn"t seem to feel pain when they were using this gas.He decided to make an experiment on himself.He asked a friend to help him.
Wells took some of the gas,and his friend pulled out one of Well’s teeth.Wells felt no pain at all.
As he didn"t know enough about laughing gas, he gave a man less gas than he should have. The man cried out with pain when his tooth was being pulled out.
Wells tried again,but this time he gave too much of the gas,and the man died.Wells never forgot this terrible event.
56.It is ___________since a man being operated felt all the pain.
A.a few more years B.not long C.few years D.two thousand years
57. Long ago, when the sick man was operated on, he___________.
A.could feel nothing B.could not want anything
C.could feel all the pain D.could do anything
58.Using the laughing gas, the people did not seem to___________.
A.be afraid of anything B.feel pain C.want to go to the parties D.be ill
59.If a man took less laughing gas than he should have when an operation went on he___________.
A.felt nothing B.felt very comfortable C.still felt pain D.would die
完形填空(共15小题;每小题2分,满分30分)
阅读下面短文,掌握其大意,然后从21-35各题所给的四个选项中选出一个最佳答案。
Every person needs water and a diet of healthy foods. These foods should contain some fat, some fiber, a little salt and so on.
People need energy 21 . They eat different kinds of food which change into energy. The energy is 22 in calories(卡). Even when you 23, you are using energy – about 65 calories an hour. 24 you are at school, or walking home, your body is burning up 100 calories an hour. When playing football or basketball, you 25 be using 400 calories an hour. On Sports Day, during the relay race, you will use most of all, 26 as much as 650 calories an hour.
The Chinese diet is considered to be the healthiest in the world. It contains a lot of fruit and green vegetables. It is 27 in fiber and low in sugar and fat. The Chinese eat less sugar than many other countries in the world. That is 28 lots of people in China have healthy white teeth.
People in the Western world do not eat such healthy foods. They eat 29 fat and sugar and don’t take enough 30 . Because of this, they 31 weight very easily. Their diet contains a lot of 32 in the form of potato crisps, potato chips, butter, cream and chocolate. They eat a lot of sugar which exist in cakes, soft drinks, 33 and so on. The result is that many of them become fat. 34 some have bad teeth. In some parts of Britain, one person in ten, 35 the age of thirty, has no teeth left.
21. A. to sleep B. to live C. to eat D .to walk
22. A. measuring B. taken C. measured D. measure
23. A. are asleep B. have a dream C. have a rest D. go to bed
24. A. While B. During C. As D. If
25. A. must B. should C. need D. might
26. A. surely B. ever C. perhaps D. seldom
27. A. rich B. poor C. good D. bad
28. A. how B. why C. what D. that
29. A. much too B. many too C. too many D. too much
30. A. activities B. food C. work D. exercise
31. A. put on B. gain on C. get on D. put up
32. A. sugar B.fat C. salt D. fiber
33. A. sweets B. vegetables C. meat D. potato
34. A. But B. Or C. And D. As
35. A. during B. for C. with D. by
I’m not sure where the editor-in-chief reached the conclusion that I was “creative”. Maybe it was through the poems I wrote. Personally, I simply enjoy writing because it’s fun. There’s also the fact that I can’t draw or do anything else creatively, I’m equally sure that there are people in the boat on the other side who can make things look excellent, but can’t write a poem.
At this point you probably want to ask me what poetry and art have to do with engineering. For one, it makes you a more rounded person, making you a better engineer. More importantly, as an engineer, you will be faced with many problems every day. There are some that can be solved by consulting a textbook, but more often than not, you will need that thing in your brain to put together things in a completely original combination to solve the problem at hand.
Think of the wonderful things that creative engineers have done. Civil engineers have made the road more long-lasting so we don’t have to close them for repairs as often. Coming up with a new innovation (创新) is similar to writing a good poem. It’s not some-thing you plan to do. The critical moment comes unexpectedly in the middle of nowhere. You don’t think about what you’re doing, you simply do. After some mad struggling you take a look at the end product and say to yourself, “This is a masterpiece. ” This is perhaps the greatest personal satisfaction one can
experience.
So all you engineers out there get out and do something creative. I don’t care if it’s writing a poem or a computer program, just be natural and do something creative.
小题1:This passage mainly deals with .
A.the creativity of engineers | B.the power of editor-in-chief |
C.engineering in general | D.a way of thinking |
A.show one is creative | B.make him happy |
C.bring him in lots of money | D.have an effect on one’s mental health |
A.find the solutions to problems | B.learn to write poetry |
C.be courageous in face of challenges | D.get along well with others |
A.logically developed | B.strictly planned |
C.experience- based | D.naturally creative |
A.planning his work successfully | B.building things quickly |
C.finishing his work innovatively | D.writing good poems naturally |
Plastic as a material enjoys the biggest demand in the modern world, but it does have a number of drawbacks. First and foremost, plastic isn’t recyclable. Secondly, it contains toxins (毒物) helping develop cancerous diseases. Finally, it’s made of oil and oil reserves aren’t endless.
The liquid wood technology is likely to replace plastic and providing mankind with new materials for many years ahead. Norbert Eisenfreich, a senior researcher at the Faunhofer Institute for Chemical Technology in Germany (ICT), said that arboform, the new material, is made of lignin(木素质), which can be obtained from soft tissues of wood. Once mixed with several other matenals, it turns into solid and non-toxic alternative for plastics.
ICT team leader Emilia Regina Inone-Kauffmann said the wood-working industry separates wood into three basic components, including lignin. Lignin isn’t used for the production of paper. Specialists of ICT mixed lignin with several natural materials and thus invented the material which could be melted and molded (铸型).
When solid, arboform looks like plastic and possesses tho qualitie of polished wood. It can be used for the production of any items. Arboform is already used for the production of car parts which require extra strength. In addition, liquid wood can be recycled repeatedly. The material preserved all of its qualities even if it’s reprocessed ten times.
However, the new invention doesn’t enjoy an extensive use due to the high content of sulfur(硫) in it. German researchers are sure to reduce the amount of sulfur by 90% very soon to make arboform usable for home needs.
小题1:According to the passage, plastic .
A.helps us to reduce the use of petrol |
B.helps to protect our environment in some way |
C.does harm to our society in some way |
D.has been replaced by the newly discovered material |
A.It is easier made from natural oil. |
B.It is more widely used in household |
C.It is recyclable and friendly to environment. |
D.It contains no poisonous materials. |
A.lignin or arboform | B.soft tissues of wood |
C.plastics or wood | D.mixture of several materials |
A.the material’s extensive use | B.the content of sulfur in arboform |
C.the production cost of arboform | D.the qualities of liquid wood |
A.introduce liquid wood which will replace plastic |
B.show readers how to produce arboform |
C.advertise the new material-arboform |
D.advertise new products made of arboform |
阅读下面短文,从短文后所给各题的四处选项(A、B、C和D)中,选出可以填入空白处的最佳选项。
A cat which became famous in Britain for riding on the buses around the southern English city of Plymouth has died after being killed by a car.
Casper, a 12 -year-old black and white cat, 26 leave his house, trotted (慢跑) across the street to the bus stop, queued with bus passengers and"waited for his 27 .He then hopped(跳跃) on the number3 bus to find his 28 seat to curl up on before hopping off at his 29 .The cat was so clever that he knew 30 stop to get off and drivers made sure that he wouldn" t get off at some random(随意的) 31 .Also, the cat seemed to know where to get back 32 , and then he trotted off home.Many local people also knew Casper, who loved everyone and also enjoyed the 33 ourneys, It seemed that 12 -year-old Casper had discovered a very efficient way to 34 the English city of Plymouth in his golden years.
However, one day , 35 a motorist hit him and did not stop.Casper was then, in fact, crossing the street to lcatch his usual No.3 bus 36 he was struck by the car.Our friend, Caspar ___37 his injuries.On hearing the news of his death, many people were 38 . A company spokesman said in a statement that Casper _39_ many people" s lives and clearly had a very 40 life traveling around Plymouth.He also suspected that Casper was telling all the other cats in the heaven a bout the many 41_he had experienced.
Casper" s owner, 55 -year - old Susan Finden, said he had always been a free spirit and was named 42 the cartoon character Casper the Friendly Ghost, because of his habit of 43 off.Finden .posted a sign at Casper" s bus stop to let people know, that they" d no longer be enjoying the company of the cat of whom they"d grown so 44 .
Casper was a special cat and he had a wonderful life.A 45 of the cat will continue to be used on one of the company" s buses. He will be missed for ever.
26.A.used to B.liked to C.hated to D.had to
27.A.time B.turn C.place D.order
28.A.best B.favpritest C. most D.favorite
29.A.destination B.determination C.decision D.description
30.A.where B.at which C.what D.in which
31.A.station B.stop C.spot D.scene
32.A.up B.down C.off D.on
33.A.bus B.car C.rail D.air
34.A.get across B.get through C.get down D.get around
35.A.sadly B.luckily C.happily D.strangely
36.A.while B.as C.when D.then
37.A.died off B.died from C.died down D.died away
38.A.shocked B.interested C.surprised D.excited
39.A.changed B.touched C.turned D.challenged
40.A.discouraging B.discouraged C.excited D.exciting
41.A.adventures B.accidents C.friends D.incidents
42.A.by B.from C.through D.after
43.A.wondering B.wandering C.cutting D.going
44.A.familiar B.similar C.fond D.popular
45.A.picture B.signal C.movie D.card
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