Ronald Hoffman born in 1937 is Polish-born American organic chemist and Nobel laureate(桂冠). As a theoretical chemist, Hoffmann studied energy levels in chemical bonds during chemical reactions. He put computers to use to solve his problems and, despite the complexity of his research, was able to explain his theories and discoveries to the non-specialist. For his work he was awarded the 1981 Nobel Prize in chemistry, which he shared with Fukui Kenichi.
Born in Poland, Hoffmann settled in New York City as a child and became a United States citizen. He received his undergraduate degree in premedical studies from Columbia College in 1958. He attended Harvard University, where he received his PhD. degree in chemical physics in 1962. He joined the faculty of Cornell University in the mid-1960s and remained there throughout his career.
Hoffmann and Nobel laureate chemist Robert Burns Woodward developed rules, based on quantum mechanics, to determine how energy levels in atomic electron orbits influence how a chemical reaction takes place. These simple rules, known as the Woodward-Hoffmann rules, allowed chemists to predict reaction results and was quickly accepted and put to use in a wide variety of situations.
Hoffmann later turned his research to a variety of problems related to discovering the molecular structure of inorganic and organometallic compounds. Hoffmann is also known for what is called the Isolobal Analogy, which is yet another discovery linking all areas of chemistry. It is useful in predicting the behavior of new molecules based on the orbit structure of the components used to form them.
Aided by computers, Hoffmann was able to generate a vast amount of data to support his ideas. Unlike the scientific papers of many chemists, Hoffmann's publications contain little raw data but instead are filled with diagrams and pictures to explain his results. His drawings of shaded balloons to indicate eigenvectors, a unit used in mathematics, are now the accepted scientific notation for illustrating this value.
What can be inferred from the above passage about Hoffman?
| A．He left his homeland when he got the Nobel Prize. |
| B．He went to the United States to gain his Nobel Prize. |
| C．He might find the Unites States a better place to learn chemistry. |
| D．His family may have settled in the United States. |
How did Hoffman make his research popular?
| A．He applied some computer skills to help explain his ideas. |
| B．He established a special computer system to help. |
| C．He drew some forms explaining his ideas. |
| D．He did series of experiments to prove his ideas. |
The underlined word “generate” in this passage might most probably mean “______”.
A. bring in B. break down
B. move away D. keep secret
Why was Ronald Hoffman awarded the 1981 Nobel Prize for chemistry?
| A．He established rules to predict chemical reactions . |
| B．He succeeded applying computer science to chemistry research. |
| C．He shared what he had achieved with another scientist named Fukui Kenichi. |
| D．He succeeded in both chemistry and computer researches. |
In business, there’s a speed difference: It’s the difference between how important a firm’s leaders say speed is to their competitive(竞争的) strategy(策略) and how fast the company actually moves.The difference is important regardless of industry and company size. Companies fearful of losing their competitive advantage spend much time and money looking for ways to pick up the speed.
In our study of 343 businesses, the companies that chose to go, go, go to try to gain an edge ended up with lower sales and operating incomes than those that paused at key moments to make sure they were on the right track.What's more, the firms that “slowed down to speed up” improved their top and bottom lines, averaging 40% higher sales and 52% higher operating incomes over a three-year period.
How did they disobey the laws of business physics, taking more time than competitors yet performing better? They thought differently about what “slower” and “faster” mean.Firms sometimes fail to understand the difference between operational speed (moving quickly) and strategic speed (reducing the time it takes to deliver value)．Simply increasing the speed of production, for example, may be one way to try to reduce the speed difference.But that often leads to reduced value over time, in the form of lower-quality products and services.
In our study, higher-performing companies with strategic speed always made changes when necessary. They became more open to ideas and discussion.They encouraged new ways of thinking.And they allowed time to look back and learn.By contrast (相比而言), performance suffered at firms that moved fast all the time, paid too much attention to improving efficiency, stuck to tested methods, didn't develop team spirit among their employees, and had little time thinking
about changes.
Strategic speed serves as a kind of leadership.Teams that regularly take time to get things right, rather than plough ahead full bore, are more successful in meeting their business goals.That kind of strategy must come from the top.What does the underlined part “gain an edge” in Paragraph 2 mean?
| A．Increase the speed. | B．Reach the limit. |
| C．Get an advantage. | D．Set a goal. |
The underlined part “the laws of business physics” in Paragraph 3 means ________.
| A．spending more time and performing worse |
| B．spending more time and performing better |
| C．spending less time and performing worse |
| D．spending less time and performing better |
What can we learn from the text?
| A．How fast a firm moves depends on how big it is. |
| B．How competitive a firm is depends on what it produces. |
| C．Firms guided by strategic speed take time to make necessary changes. |
| D．Firms guided by operational speed take time to develop necessary team spirit. |
Which could be the best title for the text?
| A．Improve quality? Serve better. | B．Deliver value? Plough ahead. |
| C．Reduce time? Move faster. | D．Need speed? Slow down. |
Although there is no possibility of living completely free of stress , it is possible to prevent stress as well as reduce its effect when it can’t be avoided. The US Department of Health and Human Services offers the following suggestions for the ways to deal with stress.
Try physical activity
When you are nervous, angry or upset, try reducing the pressure through exercise of physical activity. Running, walking, playing tennis or working in your garden are just some of the activities you might try. Physical exercise will relieve your anxiety and worry and help you to relax. Your body and your mind will work together to ease the stress in your life.
Share your stress
It helps to talk to someone about your anxiety and worries. Perhaps a friend, family member, teacher or even your leader can help you a better view of what is troubling you. If you feel your problem is serious, you might seek professional help from psychologist or a doctor. Knowing when to ask for help is an important step in avoiding serious problem later
Take care of yourself
You should make every effort to eat well and get enough rest. If you easily get angry and cannot sleep well enough, or if you are not eating properly, it will be more likely that you will fall into stressful situations. If stress repeatedly keeps you from sleeping, you should consult a doctor
Make time for yourself
Schedule time for both work and entertainment. Don’t forget, play can be just as important to your over-all well-being as work. You need a break from your daily routine to just relax and have fun. Go window-shopping or work on a hobby. Allow yourself at least a half hour each day to do something you enjoy.
Make a list of things you need to do
Stress can result from disorganization and a feeling that “there is so much to do, and not enough time.” Trying to take care of everything at once can be too much for you and as a result, you may not achieve anything. Instead, make a list of everything you have to do, then do one thing at a time, checking off each task as it is completed. Set out to do the more important tasks first.
Go ahead and cry
A good cry can a healthy way to bring relief to your anxiety. It might even help you avoid a headache or other physical effect of anxiety and stressWhat is most probably the writer’s purpose in writing the article?
| A．To release his or her working pressure |
| B．To help solve the universal problem of stress |
| C．To reduce her or his own anxiety |
| D．To help more people cry out |
Physical activity can help people release stress in that ______
| A．only your body movement can help you relax |
| B．your mind can work better to free you of anxiety |
| C．your body and mind can cooperate(合作) in releasing your stress |
| D．physics can always play in important part in reducing nervousness |
What is the similarity between “Share your stress” and “ Go ahead and cry”?_____
| A．They both help you let out your feelings |
| B．They both need physical movement |
| C．They both require mental relaxation |
| D．They can help you live an orderly life |
The sentence “ Trying to take care of everything at once can be too much for you and as a result, you may not achieve anything” is close to the meaning of ______
| A．Strike the iron while it is hot | B．Practice makes perfect |
| C．More hurry, less speed | D．Quietness wins time |
Louis Armstrong had two famous nicknames (绰号). Some people called him Bagamo. They said his mouth looked like a large bag. Musicians often called him Pops, as a sign of respect for his influence on the world of music.
Born in 1901 in New Orleans, he grew up poor, but lived among great musicians. Jazz was invented in the city a few years before his birth. Armstrong often said, “Jazz and I grew up together.”
Armstrong showed a great talent for music when he was taught to play the cornet (短号) at a boy’s home. In his late teens, Armstrong began to live the life of a musician. He played in parades, clubs, and on the steamboats that traveled on the Mississippi River. At that time, New Orleans was famous for the new music of jazz and was home to many great musicians. Armstrong learned from the older musicians and soon became respected as their equal.
In 1922 he went to Chicago. There, the tale of Louis Armstrong begins. From then until the end of his life, Armstrong was celebrated and loved wherever he went. Armstrong had no equal when it came to playing the American popular song.
His cornet playing had a deep humanity (仁爱) and warmth that caused many listeners to say, “Listening to Pops just makes you feel good all over.” He was the father of the jazz style and also one of the best-known and most admired people in the world. His death, on July 6, 1971, was headline news around the world.Armstrong was called Pops because he _________.
| A．looked like a musician |
| B．was a musician of much influence |
| C．showed an interest in music |
| D．traveled to play modern music |
The third paragraph is developed _________.
| A．by space | B．by examples | C．by time | D．by comparison |
Which statement about Armstrong is true?
| A．His tale begins in New Orleans. |
| B．He was born before jazz was invented. |
| C．His music was popular with his listeners. |
| D．He learned popular music at a boy’s home. |
Which would be the best title for the text?
| A．The Invention of the Jazz Music | B．The Spread of Popular Music |
| C．The Making of a Musician | D．The Father of the Jazz Style |
Two friends have an argument that breaks up their friendship forever, even though neither one can remember how the whole thing got started. Such sad events happen over and over in high schools across the country. In fact, according to an official report on youth violence, “In our country today, the greatest threat to the lives of children and adolescents is not disease or starvation or abandonment, but the terrible reality of violence”. Given that this is the case, why aren’t students taught to manage conflict the way they are taught to solve math problems, drive cars, or stay physically fit?
First of all, students need to realize that conflict is unavoidable. A report on violence among middle school and high school students indicates that most violent incidents between students begin with a relatively minor insult. For example, a fight could start over the fact that one student eats a peanut butter sandwich each lunchtime. Laughter over the sandwich can lead to insults, which in turn can lead to violence. The problem isn’t in the sandwich, but in the way students deal with the conflict.
Once students recognize that conflict is unavoidable, they can practice the golden rule of conflict resolution: stay calm. Once the student feels calmer, he or slid should choose words that will calm the other person down as well. Rude words, name-calling, and accusation only add fuel to the emotional fire. On the other hand, soft words spoken at a normal sound level can put out the fire before it explodes out of control.
After both sides have calmed down, they can use another key strategy for conflict resolution: listening. Listening allows the two sides to understand each other. One person should describe his or her side, and the other person should listen without interrupting. Afterward, the listener can ask non-threatening questions to clarify the speaker’s position. Then the two people should change roles.
Finally, students need to consider what they are hearing. This doesn’t mean trying to figure out what’s wrong with the other person. It means understanding what the real issue is and what both sides are trying to accomplish. For example, a shouting match over a peanut butter sandwich might happen because one person thinks the other person is unwilling to try new things.Students need to ask themselves questions such as these: How did this start? What do I really want? What am I afraid of? As the issue becomes clearer, the conflict often simply becomes smaller.Even if it doesn’t, careful thought helps both sides figure out a mutual solution.
There will always be conflict in schools, but that doesn’t mean there needs to be violence. After students in Atlanta started a conflict resolution program, according to Educators for Social Responsibility, “64% of the teachers reported less physical violence in the classroom; 75% of the teachers reported an increase in student cooperation; and 92% of the students felt better about themselves”. Learning to resolve conflicts can help students deal with friends, teachers, parents, bosses, and coworkers. In that way, conflict resolution is a basic life skill that should be taught in schools across the country.This article is mainly about .
| A．the lives of school children |
| B．the cause of arguments in schools |
| C．how to analyze youth violence |
| D．how to deal with school conflicts |
From Paragraph 2 we can learn that .
| A．violence is more likely to occur at lunchtime |
| B．a small conflict can lead to violence |
| C．students tend to lose their temper easily |
| D．the eating habit of a student is often the cause of a fight |
Why do students need to ask themselves the questions stated in Paragraph 5?
| A．To make clear what the real issue is. |
| B．To get ready to try new things. |
| C．To find out who is to blame. |
| D．To figure out how to stop the shouting match. |
After the conflict resolution program was started in Atlanta, it was found that .
| A．more teachers felt better about themselves in schools |
| B．there was less student cooperation in the classroom |
| C．there was a decrease in classroom violence |
| D．the teacher-student relationship greatly improved |
The writer’s purpose for writing this article is to .
| A．complain about problems in school education |
| B．teach students different strategies for school life |
| C．inform teachers of the latest studies on school violence |
| D．advocate teaching conflict management in schools |
Someday a stranger will read your e-mail without your permission or scan the Website you’ve visited，Or perhaps someone will casually glance through your credit card purchases or cell phone bills to find out your shopping preferences or calling habits.
In fact, it’s likely some of these things have already happened to you. Who would watch you without your permission? It might be a spouse, a girl friend, a marketing company, a boss, a cop or a criminal. Whoever it is, they will see you in a way you never intended to be seen --- the 21st century equivalent of being caught naked.
Psychologists tell us boundaries are healthy, that it's important to reveal yourself to friends, family and lovers in stages, at appropriate times.But few boundaries remain. The digital bread crumbs (碎屑) you leave everywhere make it easy for strangers to reconstruct who you are, where you are and what you like. In some cases, a simple Google search can reveal what you think. Like it or not, increasingly we live in a world where you simply cannot keep a secret.
The key question is: Does that matter?
For many Americans, the answer apparently is “no.”
When opinion polls ask Americans about privacy, most say they are concerned about losing it. A survey found an overwhelming pessimism about privacy, with 60 percent of respondents saying they feel their privacy is “slipping away, and that bothers me.”
But people say one thing and do another. Only a tiny fraction of Americans change any behaviors in an effort to preserve their privacy. Few people turn down a discount at tollbooths (收费站) to avoid using the EZ-Pass system that can track automobile movements. And few turn down supermarket loyalty cards. Privacy economist Alessandro Acauisti has run a series of tests that reveal people will surrender personal information like Social Security numbers just to get their hands on a pitiful 50-cents-off coupon (优惠卷).
But privacy does matter - at least sometimes. It’s like health: When you have it, you don’t notice it. Only when it’s gone do you wish you’d done more to protect it.What does the author mean by saying “the 21st century equivalent of being caught naked” (Lines 3-4, Para. 2)?
| A．People's personal information is easily accessed without their knowledge. |
| B．In the 21st century people try every means to look into others’ secrets. |
| C．People tend to be more frank with each other in the information age. |
| D．Criminals are easily caught on the spot with advanced technology. |
What would psychologists advise on the relationships between friends?
| A．Friends should open their hearts to each other. |
| B．Friends should always be faithful to each other. |
| C．There should be a distance even between friends. |
| D．There should be fewer disputes between friends. |
Why does the author say “we live in a world where you simply cannot keep a secret” ( Line5, para. 3)?
| A．Modern society has finally evolved into an open society. |
| B．People leave traces around when using modern technology. |
| C．There are always people who are curious about others’ affairs. |
| D．Many search engines profit by revealing people’s identities. |
What do most Americans do with regard to privacy protection?
| A．They change behaviors that might disclose their identity. |
| B．They use various loyalty cards for business transactions. |
| C．They rely most and more on electronic devices. |
| D．They talk a lot but hardly do anything about it. |
According to the passage, privacy is like health in that .
| A．people will make every effort to keep it |
| B．its importance is rarely understood |
| C．it is something that can easily be lost |
| D．people don’t cherish it until they lose it |