What will power your house in the future？Nuclear，wind，or solar power？According to scientists at the Massachusetts Institute of Technology (MIT) in the US，it might be leaves — but artificial (人造的) ones.
Natural leaves are able to change sunlight and water into energy. It is known as photosynthesis (光合作用)．Now researchers have found a way to imitate this seemingly simple process.
The artificial leaf developed by Daniel Nocera and his colleagues at MIT can be seen as a special silicon chip with catalysts (催化剂)．Similar to natural leaves，it can split water into hydrogen and oxygen when put into a bucket of water. The hydrogen and oxygen gases are then stored in a fuel cell，which uses those two materials to produce electricity，located either on top of a house or beside the house.
Though the leaf is only about the shape of a poker card，scientists claimed that it is promising to be an inexpensive source of electricity in developing countries. “One can imagine villages in India and Africa not long from now purchasing an affordable basic power system based on this technology,” said Nocera at a conference of the American Chemical Society.
The artificial leaf is not a new idea. The first artificial leaf was invented in 1997 but was too expensive and unstable for practical use. The new leaf，by contrast，is made of cheap materials，easy to use and highly stable. In laboratory studies，Nocera showed that an artificial leaf prototype (原型) could operate continuously for at least 45 hours without a drop in activity.
The wonderful improvements come from Nocera's recent discovery of several powerful，new and inexpensive catalysts. These catalysts make the energy transformation inside the leaf more efficient with water and sunlight. Right now，the new leaf is about 10 times more efficient at carrying out photosynthesis than a natural one. Besides，the device can run in whatever water is available；that is，it doesn't need pure water. This is important for some countries that don't have access to pure water.
With the goal to “make each home its own power station” and “give energy to the poor”，scientists believe that the new technology could be widely used in developing countries，especially in India and rural China.
【小题1】Which of the following orders correctly shows how the artificial leaf is used to produce electricity?
a．artificial leaves split water into hydrogen and oxygen
b．the hydrogen and oxygen gases are stored in a fuel cell
c．the artificial leaves are put in water
d．the fuel cell uses hydrogen and oxygen to produce electricity
| A．c，a，b，d | B．c，b，a，d |
| C．b，c，a，d | D．c，a，d，b |
| A．build up more power stations in the world |
| B．provide cheaper energy for developing countries |
| C．offer people in developing countries access to pure water |
| D．gain a deeper understanding of the photosynthesis process |
| A．an introduction to the history of artificial leaves |
| B．a mixture of water power and solar energy |
| C．giving energy to the poor |
| D．an invention copying photosynthesis |
【小题1】A
【小题2】B
【小题3】D
解析试题分析：本文介绍了一项仿造叶子光合作用的发明—人工叶子的工作原理、工作性能和工作条件，可为发展中国家提供便宜的能源。
【小题1】细节题：根据第三段中“it can split water into hydrogen and oxygen when put into a bucket of water. The hydrogen and oxygen gases are then stored in a fuel cell，which uses those two materials to produce electricity，located either on top of a house or beside the house.”当把它投入一桶水中，可以把水分解成氢和氧。然后把氢和氧气体储存到放置在房间里或房子的旁边的燃料电池中,使用这两个材料来产生电能。由此可知正确顺序是A。故选A。
【小题2】细节题：根据第四段中“scientists claimed that it is promising to be an inexpensive source of electricity in developing countries.”科学家声称,它可为发展中国家提供廉价的电力来源。故选B。
【小题3】主旨题：阅读全文可知本文介绍了一项仿造叶子光合作用的发明—人工叶子的工作原理、工作性能和工作条件，可为发展中国家提供便宜的能源。故选D。
考点：考查科教类阅读
名校课堂系列答案科目：高中英语 来源： 题型：阅读理解
Will online courses transform world of education?
Some may wonder what it feels like to attend a class at Stanford University. The recently popular MOOCs (Massive Open Online Courses) can satisfy this desire. But they are also most likely to change the situation of higher education. Only last month，both Peking University and Tsinghua University announced plans to start open online course on the edX platform，one of the world’s major providers of MOOCs，to explore this new form of online education.
Gaining momentum(势头)
“It’s not only a change of platforms from offline to online. It’s more about a reform of
teaching methods，even the whole education system，”said Chen Jining，president of Tsinghua University.
The potential of MOOCs to reform education has been obvious in the US ever since the immediate popularity of the course Artificial Intelligence，taught by Stanford University professor Sebastian Thrun, who later co-founded Udacity, a platform with 1.6 million enrolled(注册) students in 200 countries. According to Nature magazine，by June 2013，74 percent of universities in the US offered some type of online course. Lu Fang, vice-president of Fudan University，explains the appeal of MOOCs as a simple case of supply and demand：“The demand for high quality educational resources from both enrolled students and professionals is feeding the rise of MOOCs，in which classes usually taught by top teachers are available to everyone，”said Lu.
Too early to replace
With easy access and free of charge, MOOCs are said to have the potential to change the present education system. But there are barriers，because hardly any universities offer degree certificates, as college administrators point out, it’s difficult to confirm if students are foaming anything in MOOCs，reposed USA Today．
The Wall Street Journal also reposed that，presently，a typical MOOC student is likely to have
already graduated from college and is using the course to explore an interest or acquire professional
skills. Even so, an increasing number of undergraduates are signing up.
“What we are really establishing(创建)are educational pathways for people who want skills that are related to contemporary jobs，”Thrun told The Wall Street Journal．
【小题1】MOOCs have been considered likely to reform education since___________．
| A．the founding of Udacity |
| B．the wide application of online education |
| C．the popularity of the course Artificial Intelligence |
| D．the opening of MOOCs on the edX platform in China |
| A．high quality educational resources are in demand |
| B．students can attend courses in famous universities |
| C．college students have access to famous teachers |
| D．MOOCs have brought about revolution in education |
| A．Most of the MOOCs focus on professional training for college graduates． |
| B．There are barriers for MOOCs to replace the present education system． |
| C．International companies prefer applicants who graduate from MOOCs． |
| D．More and more undergraduates have realized the limits of MOOCs． |
| A．doubtful | B．negative | C．critical | D．optimistic |
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科目：高中英语 来源： 题型：阅读理解
How far would you be willing to go to satisfy your need to know？Far enough to find out your possibility of dying from a terrible disease？These days that’s more than an academic question，as Tracy Smith reports in our Cover Story.
There are now more than a thousand genetic(基因的) tests，for everything from baldness to breast cancer，and the list is growing.Question is，do you really want to know what might eventually kill you？For instance，Nobel Prizewinning scientist James Watson，one of the first people to map their entire genetic makeup，is said to have asked not to be told if he were at a higher risk for Alzheimer’s(老年痴呆症)．
“If I tell you that you have an increased risk of getting a terrible disease，that could weigh on your mind and make you anxious，through which you see the rest of your life as you wait for that disease to hit you.It could really mess you up.” said Dr.Robert Green，a Harvard geneticist.
“Every ache and pain，” Smith suggested，could be understood as “the beginning of the end.”“That’s right.If you ever worried you were at risk for Alzheimer’s disease，then every time you can’t find your car in the parking lot，you think the disease has started.”
Dr.Green has been thinking about this issue for years.He led a study of people who wanted to know if they were at a higher genetic risk for Alzheimer’s.It was thought that people who got bad news would，for lack of a better medical term，freak_out.But Green and his team found that there was “no significant difference” between how people handled good news and possibly the worst news of their lives.In fact，most people think they can handle it.People who ask for the information usually can handle the information，good or bad，said Green.
【小题1】The first paragraph is meant to________.
| A．ask some questions |
| B．introduce the topic |
| C．satisfy readers’ curiosity |
| D．describe an academic fact |
| A．He is strongly in favor of the present genetic tests. |
| B．He is more likely to suffer from Alzheimer’s disease. |
| C．He believes genetic mapping can help cure any disease. |
| D．He doesn’t want to know his chance of getting a disease. |
| A．advisable not to let him know |
| B．impossible to hide his disease |
| C．better to inform him immediately |
| D．necessary to remove his anxiety |
| A．break down | B．drop out |
| C．leave off | D．turn away |
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科目：高中英语 来源： 题型：阅读理解
Researchers conducting a study of hospital stays for over two hundred and eighty six thousand older folks found something interesting in their data.
The number of hospitalizations for heart disease and stroke went down significantly among a certain group of people at a certain time of year. What folks, and what time of year, you ask? Flu season and the lucky people were the ones who got flu shots(流感疫苗).
It’s generally recommended that people over fifty get their flu shots every year. Influenza(流行性感冒) is no small thing. it’s responsible for around thirty six thousand deaths a year in the U. S. alone. Getting the shots also cuts down on the chances of getting pneumonia(肺炎), which is especially dangerous in seniors.
But what wasn’t known was that there seems to be an added benefit to getting a flu shots in terms of warding off heart problems. The data,in fact, are quite strong in suggesting this is the case.
In this study, flu shots cut clown the number of hospitalizations for heart disease by nineteen percent. Stroke went down sixteen percent one season and a whopping twenty-three percent a second season.These are big results.
So what's the connection between getting a flu shot and having a stronger heart? It isn’t yet known.
Researchers speculate that the flu virus itself may do damage to blood vessels(血管), possibly making clots(血块)more likely. Blood clots in the heart can cause heart attacks, and blood clots in the brain can cause strokes.
Whatever the specific details are, there's one more good reason to follow your doctor’ s advice and get that annual flu shot.
【小题1】According to the study, the number of hospitalizations for heart disease and stroke went down significanntly among the ones who _____.
| A．got flu shots after they were ill |
| B．got flu shots before they were ill |
| C．got flu shots at the flu season |
| D．got flu shots whenever convenient |
| A．it can cut down on the chances of getting pneumonia |
| B．it can cut down the number of hospitalizations for heart disease |
| C．it can kill the flu virus |
| D．if can make blood clots |
| A．keeping away | B．dealing with | C．setting off | D． picking up |
| A．work out to fight against influenza | B．get flu shot every year |
| C．follow our doctor's all advice | D．protect our blood vessels |
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科目：高中英语 来源： 题型：阅读理解
techniques , but he admitted there would be difficulties in meeting his goal .
“ For example , if you run out of ink while printing on paper , you will throw that paper away . But you cannot throw half-completed buildings away if your material gets stuck , ” he said . Although the printed house is not available to visit , there is a chance for people in Shanghai to see items printed in 3D.
The Belgium-based company Materialise NV held a 3D printing exhibition in Shanghai that started in late 2012 and ended in the middle of 2013 . The company is eager to show Asia what is possible with 3D printing .
“ All the pieces shown here are what cannot be made through traditional techniques . A good example of this customization is hearing aids . More than 10 million people already use 3D printed hearing aids, all made according to the size of their ears , ” said Wim Michiels , executive vice-president at Materialise NV .
“ You can produce anything whenever and wherever you like . You don’t need to set up production lines for pieces that only need a limited amount of products . Setting up a production line is a lot of work . It takes a long time and is very expensive for a limited number of pieces , ” said Michiels .
Kim Francois , managing director of Materialise China , said their European and American clients have already taken the next step toward additive manufacturing with small series production such as hearing aids .
【小题1】What is mainly talked about in the text ?
A. The development of 3D printing .
B. A 3D printing show in Shanghai .
C. Varieties of items printed in 3D .
D. The company Materialise NV .
【小题2】According to Behrokh Khoshnevis , what is the main difficulty in printing buildings ?
| A．Time . | B．Technique . | C．Space . | D．Material . |
| A．these items used to be impossible to make |
| B．3D printing has a large market share |
| C．3D hearing aids help people hear better |
| D．people need different sized hearing aids |
| A．mass production |
| B．making small items |
| C．small series production |
| D．reducing production costs |
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科目：高中英语 来源： 题型：阅读理解
The Royal Commission on Environmental Pollution has just published a report on new materials and has looked at the case of nanotechnology（纳米技术）, which describes the science of the very small. Nanotechnology covers those man-made materials or objects that are about a thousand times smaller than the microtechnology（微电子技术）we use, such as the silicon chips of computers.
Nanotechnology gets its name from the nanometer, which is a billionth of a meter. There are about 600 consumer products already on the market that use nanotechnology. Nanomedicine is also being developed to fight cancer and other fatal diseases.
The Royal Commission found no evidence of harm to health or the environment from nanomaterials, but this “absence of evidence” is not being taken as “evidence of absence”. In other words, just because there are no apparent problems, this is not to say that here is no risk now or in the future. The commission is concerned about the pace at which we are inventing and adopting new nanomaterials, which could result in future problems that we are ill-equipped to understand or even find with current testing methods.
One of the problems about nanotechnology is that when we make something very small out of a well known material, we may actually change the functionality of that material even if the chemical composition remains the same. Indeed, it is not the particle（颗粒）size that should concern us, but its functionality. Take gold, for example, which is a famously inert (惰性) substance, and valuable because of it. It doesn’t rust or corrode because it doesn’t interact with water or oxygen. However, a particle of gold that is between 2 and 5 nanometers in diameter becomes highly reactive. This is not due to a change in chemical composition, but because of a change in the physical size of the gold particles. How can a change in size result in a change of function? One reason is to do with surface area. Nanoparticles have relatively a much bigger surface area. It is like comparing the surface area of a basketball with the total surface area of many pea-sized balls with the same weight of the single basketball. The pea-sized balls have a surface area many hundreds, indeed thousands of times bigger than the basketball, and this allows them to interact more easily with the environment. It is this increased interactivity that changes their functionality—and makes them potentially more dangerous to health or the environment.
【小题1】Why does the writer mention microtechnology in the first paragraph?
| A．to introduce the topic of nanotechnology |
| B．to help us better understand nanotechnology |
| C．to help us know more about microtechnology |
| D．to compare microtechnology with nanotechnology |
| A．gold is valuable because it is an inert substance |
| B．an inert substance like gold doesn’t interact with water or oxygen |
| C．the function of gold is steady because it is an inert substance |
| D．the function of gold changes when made into something very small |
| A．expand surface area →increase interactivity → change functionality→cause possible dangers |
| B．expand surface area → change functionality → increase interactivity →cause possible dangers |
| C．increase interactivity → expand surface area → change functionality→cause possible dangers |
| D．increase interactivity → change functionality → expand surface area→cause possible dangers |
| A．the introduction of nanotechnology and its wide use |
| B．the present use of nanotechnology and its future |
| C．the potential danger nanotechnology may bring us |
| D．the proposal to stop nanotechnology due to the potential danger |
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科目：高中英语 来源： 题型：阅读理解
With 10, 600 bicycles in circulation，Paris city officials are hoping the program will provide people with more environmentally friendly transportation．
It seems both Parisians and tourists are taking advantage of the program．Since its launch a little over two weeks ago，Vélib has already seen almost half a million rentals．And，with the addition of 10，000 more bikes and 700 more stations in the next 12 months，city officials expect at least 200，000 regular users by year end．
Parisian Olivier Bioret has already gone for a spin on one of Vélib’s vehicles and plans to make use of them more often．
“It’s a real pleasure—when，like me，you don’t have space enough in your flat to have your
own bike—to be able to discover．to cross Paris and not have to take the subway，”he said．
As a socialist and longtime green activist，Mayor Bertrand Delanoe regards Vélib as just a part of his plan to reduce car traffic and，thus，lower pollution by 2020．
Apart from its environmental benefits，Vélib is also being praised as a way of collecting money for the city，for all the money from rentals goes to the city government．
Paris is not alone in its attempt to profit from the power of the bicycles．
Across the globe，cities such as Barcelona，which stated its bike-share program in March with 1,500 vehicles and 100 stations，and New York，which launched a five-day trial program last month，are using bicycles as a way to cut back on both traffic and pollution．
However，it remains to be seen whether people’s acceptance of these programs is simply a
passing fashion or whether this movement has the power to take root and transform the face of public transportation around the world．
【小题1】The real purpose of Vélib is________．
| A．to help people save money and space |
| B．to make some money for the city government |
| C．to provide convenience to both Parisians and tourists |
| D．to reduce traffic and pollution in the city |
| A．There will be 700 stations in one year’s time． |
| B．There will be over 20, 000 bikes in use in a year． |
| C．In the first two weeks there were nearly a million rentals． |
| D．There will be 200, 000 regular rentals each day by year end． |
| A．other cities also have such programs |
| B．Parisians can use the bicycles free of charge |
| C．Paris sets an example to many other cities |
| D．Paris is the first city to start such a program |
| A．critical | B．optimistic | C．uncertain | D．negative |
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科目：高中英语 来源： 题型：阅读理解
“The first and best of victories is for a man to conquer himself; to be conquered by himself is, of all things, the most shameful，” says Plato. Selfcontrol is at the root of all the advantages. Let a man give in to his impulses (冲动) and feelings, and from that moment he gives up his moral (道德上的) freedom.
A single angry word has lost many a friend. When Socrates found in himself any temper or anger, he would check it by speaking low in order to control himself. If you are conscious of being angry, keep your mouth shut so that you can hold back rising anger. Many a person has dropped dead in great anger. Fits of anger bring fits of disease. “Whom the gods would destroy they firstmake mad” “Keep cool”， says George Herbert, “for fierceness (狂怒) makes error a fault.”
To be angry with a weak man is to prove that you are not strong yourself. “Anger，” says Pythagoras, “brings with folly(愚蠢) and ends with regret.” You must measure the strength of a man by the power of the feelings he conquers, not by the power of those which conquer him.
Selfcontrol is man's last greatest victory.
If a man lacks selfcontrol he seems to lack everything. Without it he can have no patience, no power to govern himself; he can have no selfconfidence, for he will always be controlled by his strongest feeling. If he lacks selfcontrol, the very backbone and nerve of character are lacking also.
【小题1】What does the reader learn from the first paragraph?
| A．The greatest victory for a man is to conquer everything except himself. |
| B．One's moral freedom is based on the control of himself. |
| C．To control oneself is the most difficult in one's life. |
| D．If a person is too stubborn, he will feel most shameful. |
| A．If the gods want to kill you, they make you crazy first. |
| B．If you cannot control yourself, you will become crazy. |
| C．If you always lose your temper, you will soon be finished. |
| D．If you are mad, you will be punished by the gods. |
| A．the very backbone and nerve of character |
| B．the patience and power to control himself |
| C．selfconfidence |
| D．strong feelings |
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科目：高中英语 来源： 题型：阅读理解
(2013·宜春五校联考)Technology is making life easier for some dairy farmers.They use robotic systems to milk their cows.Cows are trained to follow a series of paths that lead to milking stations.Only one cow at a time can enter a station.
Once inside，the cow is rewarded with food.As the cow eats，a robotic arm cleans and connects the animal to the milking machine.A few minutes later，milking is complete.The gate is opened，the cow is released and the next cow enters.
The robotic systems are designed to operate 24 hours a day.The cows get to decide when they want to be milked.Cows are milked an average of about three times a day.Some are milked four to six times a day.
The cows wear collars around their necks that identify them to the system.A computer keeps records on their eating and milking.A cow is released from the station if the computer decides it should not be milked.
The automated system also measures the temperature and color of freshly produced milk.Milk is thrown away if it does not pass the tests.
Professor Plaut believes the systems will appeal especially to the next generation of farmers.She means young people who are more interested in technology and less interested in working all the time on the farm.Still，she says the price of robotic milking systems will continue to limit their use.
Doug and Tina Suhr have more than 100 cows on their family farm.Last year it became the fourth farm in southeast Minnesota to get a robotic milking system.A recent story in a local agricultural newspaper said the first robot costs 175,000 dollars.The second costs 150,000 dollars.
Doug told AgriNews that wages that would have been paid for one employee in five years will pay for one robot.He says the increase in milk production reaches a high of more than six kilograms per cow per day.
【小题1】From the first paragraph，we can infer ________.
| A．the robotic system is designed to reduce labor |
| B．cows can be raised by robots in the future |
| C．robots direct cows into milking stations |
| D．cows are kept clean by robots on some farms |
| A．adjust the temperature of milking stations |
| B．judge the quality of fresh milk |
| C．improve the appetite of cows |
| D．keep fresh milk for two weeks |
| A．Because young people have no interest in it. |
| B．Because it is difficult to learn how to use it. |
| C．Because people can't afford to buy it. |
| D．Because it usually causes the waste of milk. |
| A．$150,000～$175,000. |
| B．over $75,000. |
| C．$150,000～$30,000. |
| D．$30,000～$35,000. |
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