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.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 |
The purpose of the scientists at MIT in developing the new artificial leaf is to________.
| 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 |
The main idea of this passage is ________.
| 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 |
Do you want to live another 100 years or more? Some experts say that scientific advances will one day enable humans to last tens of years beyond what is now seen as the natural limit of the human life span.
"I think we are knocking at the door of immortality(永生)," said Michael Zey, a Montclair State University business professor and author of two books on the future. "I think by 2075 we will see it and that’s a conservative estimate".
At the conference in San Francisco, Donald Louria, a professor at New Jersey Medical School in Newark said advances in using genes as well as nanotechnology（纳米技术）make it likely that humans will live in the future beyond what has been possible in the past. "There is a great push so that people can live from 120 to 180 years," he said. "Some have suggested that there is no limit and that people could live to 200 or 300 or 500 years."
However, many scientists who specialize in ageing are doubtful about it and say the human body is just not designed to last about 120 years. Even with healthier lifestyles and less disease, they say failure of the brain and organs will finally lead all humans to death.
Scientists also differ on what kind of life the super aged might live. "It remains to be seen if you pass 120, you know; could you be healthy enough to have good quality of life?" said Leonard Pooh, director of the University of Georgia Gerontology(老龄学) Center. "At present people who could get to that point are not in good health at all."By saying "we are knocking at the door of immortality", Michael Zey means ________.
| A．they believe that there is no limit of living |
| B．they are sure to find the truth about long living |
| C．they have got some ideas about living forever |
| D．they are able to make people live past the present life span |
Donald Louria's attitude towards long living is that ________.
| A．people can live from 120 to 180 years |
| B．it is still doubtful how long humans can live |
| C．the human body is designed to last about 120 years |
| D．it is possible for humans to live longer in the future |
The underlined "it"（paragraph 4）refers to ________.
| A．a great push |
| B．the idea of living beyond the present life span |
| C．the idea of living from 200 to 300 years |
| D．the conservative estimate |
What would be the best title for this text?
| A．Living Longer or Not |
| B．Science, Technology and Long Living |
| C．No Limit for Human Life |
| D．Healthy Lifestyle and Long Living |
With a busy life and job, pressure can make you look tired and aged. Kissi Health-Beauty Center gives classes, makes training plans according to your physical conditions, and sets up an individual file. All these things will help you to get to know your body and the way to keep it fit.
1)BODY-BUILDING
Imported gym equipment will help you build up your body’s muscles, making you look full of energy and strength.
2)GYMNASTIC EXERCISES
A bright and large exercise room with excellent equipment and music will give your body a chance to enjoy movement with rhythm.
3)SPECIAL “LAZY-BONE” FITNESS CENTER
“Lazy-bone” fitness equipment is the first bodyshaping set of seven beds in Houston. Designed according to human anatomic (解剖学的) and kinematic（运动学的）theory, the seven special beds will help you to exercise your waist, abdomen（腹）, hips（臀）or legs. In the relaxing hours you may try them to strengthen your muscles and lose weight.
*Tuition: “Lazy-bone” fitness card, 1000 dollars /month (gymnastic classesincluded).
*Open Time: 10:30 a.m. —10:30 p.m. every Monday, Wednesday, Friday, Saturday and Sunday
*Tel: 59185700
*Address: 16 Johnson Street, Houston The purpose of this passage is to ______.
| A．give advice on health | B．introduce new ways of body-building |
| C．ask you to go to the center | D．introduce ways to lose weight |
If you want some exercise as well as relaxation after a busy day, you’ll go to the center and ______.
| A．learn anatomic and kinematic theory | B．lie still on the special beds |
| C．join in the gymnastic exercises | D．buy a special card |
Tom Everest who keeps a “Lazy-bone” fitness card can go to the center ______ this week.
| A．11:30 a.m. Monday | B．11:30 p.m. Monday |
| C．10:00 a.m. Tuesday | D．10:00 p.m. Tuesday |
According to the passage, the center wants to show it is _____ .
| A．the most convenient | B．the largest |
| C．the newest | D．the most advanced |
Astronomers (天文学家) say they are on the point of finding planets like Earth orbiting other stars, which is a key step in determining if we are alone in the universe.
A top NASA official and other leading scientists say that within four or five years they should discover the first Earth-like planet where life could develop, or may have already. A planet close to the size of Earth could even be found sometime this year.
At the annual American Astronomical Society conference this week, each discovery involving so-called “exoplanets” —those outside our solar system — pointed to the same conclusion：Quiet planets like Earth where life could develop probably are plentiful.
NASA’s Dew Kepler telescope and a lot of new research from the suddenly hot and competitive exoplanet field caused noticeable buzz at the meeting．Scientists are talking about being at “an incredible special place in history” and closer to answering the question. “Are we alone? For the first time, there’s an optimism that sometime in our lifetimes we’re going to get to the bottom of that,” said Simon Worden，an astronomer who heads NASA’s Ames Research Center. “If I were a betting man, which I am, I would bet we’re not alone.”
“These are big questions that reflect upon the meaning of the human race in the universe,” the director of the Vatican Observatory, the Rev. Jose Funes, said Wednesday in an interview at this week’s conference.
Worden told The Associated Press: “I would certainly expect in the next four or five years we’d have an Earth-sized planet in the habitable (可居住的) zone.”What is very important in determining if we are alone in the universe?
| A．Finding an Earth-like planet |
| B．Orbiting other stars. |
| C．Developing new telescopes |
| D．Finding more exoplanets. |
What’s an exoplanet?
| A．It’s a planet like Earth |
| B．It’s a planet outside our solar system. |
| C．It’s a planet orbiting the sun |
| D．It’s a planet where life have developed. |
The underlined phrase “get to the bottom of” probably means “__________”.
| A．understand fully | B．make full use of |
| C．search for | D．do more research on |
From the passage we can learn that __________.
| A．an Earth-like planet has been found |
| B．it’s been proved we are not alone in the universe |
| C．Jose Funes has found the meaning of the human race in the universe |
| D．the discovery of an Earth-like planet could happen in the near future |
It is important that you make a good impression at work. If you make a good impression on your boss, he or she is more likely to give you more responsibilities which can lead to promotions (晋级) and raises. Here are some ways to make a good impression at work.
Use Proper Office Etiquette (礼仪)
Using proper manners will help you make a good impression on your boss and also your co-workers. Office etiquette includes everything from the proper way to e-mails to knowing when, where, and how to use your cell phone at work.
Face up to Your Mistakes
When you make a mistake at work, which everyone inevitably (不可避免地) does at some points, face up to it. Don’t ignore your error or place the blame on others. Take responsibility and come up with a solution to fix your mistake. Your boss may not be too happy about it, but she will at least be impressed with your response.
Know to Call in Sick
Do you think coming to work when you are sick instead of staying at home will impress your boss? Reasonable bosses know that a sick employee not only is unproductive but also he or she can spread an illness around the office. Call in sick(打电话请病假) when you are ill.
Come Through in a Crisis
When the unexpected happens at work, who will make a better impression on the boss? Of course it’s the employee who deals with the crisis quickly and effectively.What would be the best title for the passage?
| A．How to Use Good Etiquette |
| B．How to Deal with Mistakes at Work |
| C．How to Be a Good Worker in the Future |
| D．How to Make a Good Impression at Work |
What should you do if you make a mistake at work?
| A．Try to ignore the mistake. |
| B．Put the blame on others. |
| C．Think out a solution to your mistake. |
| D．Leave the company as soon as possible. |
According to the writer, when you are ill you’d better _________.
| A．go to work on time as usual |
| B．stay at home without telling others |
| C．go on working but stay away from others |
| D．stop working and ask for a leave |
Who will make good impressions on the boss?
| A．Employees who deal with the crisis quickly and effectively. |
| B．Employees who often make mistakes. |
| C．Employees who go to work though they are ill. |
| D．Employees who often use their cell phones at work. |
Once there was an 11-year-old boy who went fishing with his father in the middle of a New Hampshire lake. On the day before bass (巴斯鱼) season opened, they were fishing early in the evening, catching other fish with worms. Then the boy tied on a small silver lure (鱼饵) and put it into the lake. Suddenly he felt that something very big pulling on the lure. His father watched with admiration as the boy skillfully brought the fish beside the bank. Finally he lifted the tired fish from the water. It was the largest one he had ever seen, but it was a bass.
The boy and his father looked at the big fish. The father lit a match and looked at his watch. It was 10 pm – two hours before the season opened. He looked at the fish, then at the boy. “You’ll have to put it back, son,” he said.
“Dad!” cried the boy, “There will be other fish,” said his father. “Not as big as this one,” cried the boy. He looked around the lake. No other fishermen or boats were in sight in the moonlight. He looked again at his father.
Even though no one had seen them, nor could anyone ever know what time he had caught the fish, the boy could tell from his father’s voice that the decision couldn’t be changed. He threw the huge bass into the black water. The big fish disappeared. The boy thought that he would never again see such a big fish.
That was 34 years ago. Today the boy is successful architect in New York City. He often takes his own son and daughters to fish at the same place.
And he was right. He has never again caught such a large fish as the one he got that night long ago. But he does see that same fish … again and again … every time he has an ethical (伦理的，道德的) decision to make. For, as his father had taught him, ethics are simple matters of right and wrong. It is only the practice of ethics that is difficult.What happened when the big fish turned out to be a bass?
| A．The boy cooked the big fish. |
| B．The boy threw the bass back into the water willingly. |
| C．The father lit a match in order to check the time. |
| D．They worried other fishermen may discover what they had done. |
From the text we know that the father _________.
| A．didn’t love his son | B．always disagreed with his son |
| C．disliked the huge fish | D．was firm and stubborn |
The successful architect went fishing with his children at the same place because _________.
| A．they might catch a big fish there |
| B．he was taught a moral lesson there |
| C．it was a most popular fishing spot |
| D．their children enjoyed fishing there |
What does the story imply?
| A．It is easy to say something, but difficult to do |
| B．An ethical decision is always easy to make. |
| C．It’s hard to tell right from wrong sometimes |
| D．Fishing can help one to make right decisions. |