It happened one morning 20 years ago. A British scientist Alec Jeffrey came across DNA fingerprinting: He identified the patterns of genetic material that are unique to almost every individual. His discovery changed everything from the way we do criminal investigations to the way we decide family law. But the professor of genetics at the University of Leicester, UK, is still surprised, and a bit worried, by the power of the technology he released upon the world.
The patterns within DNA are unique to each individual, except identical twins, who share the same pattern. The ability to identify these patterns has been used to convict(证明…有罪) murderers and to clear people who are wrongly accused. It is also used to identify the victims of war and settle disputes over who is the father of a child.
Jeffrey said he and his colleagues made the discovery by accident while tracking genetic
variations(变异). But, within six months of the discovery, genetic fingerprinting had been used in an immigration case, to prove that an African boy really was his parents’ son.·In 1986, it was used for the first time in a British criminal case: It cleared one suspect after being accused of two murders and helped convict another man.
DNA testing is now very common. In Britain, a national criminal database established in 1995 now contains 2.5 million DNA samples. The U.S. and Canada are developing similar systems. But there are fears about the stored DNA samples and how they could be used to harm a person’s privacy. That includes a person’s medical history, racial origin or psychological profile. “There is the long-term risk that people can get into these samples and start getting additional information about a person’s paternity(父子关系) or risk of disease,” Jeffrey said.
DNA testing is not an unfailing proof of identity. Still, it is considered a reasonably reliable system for determining the things it is used for. Jeffrey estimates the probability of two individuals’ DNA profiles matching in the most commonly used tests at one in a billion.
62. According to the text, DNA testing can NOT be used in _______ .
A. doing criminal investigations B. deciding faraily law
C. clearmg wrongly accused people D. telling twins apart
63. DNA samples are not popular with all the people because _______ .
A. the government in Britain establishes a criminal database
B. the US and Canada develop similar systems
C. DNA samples can be used to harm a person’s privacy
D. DNA testing is too expensive and dangerous now
64. Where will you most probably find this article?
A. In a guidebook. B. In a storybook.
C. In a science fiction. D. In a scientific magazine.
65. Which is the best title for the passage?
A. Discovery of DNA testing by Jeffery B. Practice of DNA testing in court
C. DNA testing in the present situation D.Benefits and side effects of DNA testing
One of the best-known American writers of children’s books is Alfred Strong, or Doctor Strong, as he is better known to readers everywhere. Now, an art show called “Doctor Strong from then to now” is traveling around the United States. The pictures and drawings show the history of Doctor Strong.
Doctor Strong first became famous almost fifty years ago when his first children’s book was published. Since then, he has written forty-five books that have sold more than hundred million copies around the world.
Doctor Strong’s books are known for their easy use of words and colorful, hand-drawn pictures. These drawings bring life to his imaginary creatures. The Cat in the Hat, Horton the elephant, The Grinch Who Stole Christmas, and hundreds of others.
The San Diego Museum, in California, organized the art show. It included about three hundred Doctor Strong’s original(最早的) drawings and some of his writings.
Most of Doctor Strong’s books, although written in a funny way, have serious messages. For example, in Mc Elligot’s Pool, he describes the danger of pollution. He discusses the arms race in The Butter Battle Book, written in 1984.
Doctor Strong is almost eighty-four years old now. He says he never planned to write stories just for children. He says he uses easy words so that everyone, even a child, can understand.Alfred Strong is a famous __________ in the United States.
| A．doctor | B．artist | C．writer | D．reader |
Doctor Strong first became famous in __________.
| A．his eighties when an art show was traveling around the United States |
| B．his fifties when his drawings and writings were published |
| C．1984 when his book McElligot’s Pool was published |
| D．his thirties when his first book was published |
Doctor Strong’s books are very popular in America because _________.
| A．they are stories about animals such as cats, elephants and so on |
| B．they are written in easy words with colorful pictures |
| C．he organized the art show in California |
| D．they are written in a funny way |
His purpose in writing many such books is _________.
| A．to show his original pictures and drawings |
| B．to organize a special art show of his own |
| C．to make his readers laugh or smile when they read his books |
| D．not only to interest people but to expose(揭露) some serious social problems |
Television, which made its first serious appearance in 1939, did not become common until the early 1950s. Since then, millions of children have grown up in front of the set, and many people now worry about the effect that TV has on the young, and on society in general. Educators, psychologists, and crime experts wonder if television should be abolished(取消). Many ordinary parents wish it had never been invented. Why are they so afraid? Is television as harmful as they think it is?
Like almost anything else, television has its good and its bad sides. One should surely thank its inventors for the joy and interest that they have brought into the lives of the old, the sick, and the lonely -- all those who, without it, would have no pleasure and no window on the world.
In truth, television has opened windows in everybody's life. No newspaper has ever reached so many people and shown so clearly what was happening right now in their own country and everywhere else. TV not only gives the news instantly, it also shows it in pictures more powerful than words. It can be said that TV has brought reality to the public. Millions of people now have seen the effects of a battle, a flood, a fire, a crime, disasters of every sort on the screen.
Unfortunately, television's influence has been extremely harmful to the young. Children do not have enough experience to realize that TV shows present an unreal world. They want to imitate what they see. They do believe that the violence they see is normal and acceptable. By the time they are out of high school, most young people have watched about 15,000 hours of television, and have seen about 18,000 killings or other acts of violence. All educators and psychologists agree that the "television generations" are more violent than their parents and grandparents,
According to the same experts, the young are also less patient. Used to TV shows, where everything is quick and entertaining, they do not have the patience to read an article without pictures; to read a book that requires thinking; to listen to a teacher who doesn't do funny things like the people on children's programs. And they expect all problems to be solved happily in ten, fifteen or thirty minutes. That's the time it takes on the screen.
It is certain that television has deeply changed our lives and our society. It is certain that, along with its benefits, it has brought many serious problems. To these problems we must soon find a solution because, whether we like it or not, television is here to stay.First TV set was made ______.
| A．in 1939 | B．in the 1950s |
| C．in the 1940s | D．in 1919 |
Which of the following people have a view on TV different from the others?
| A．Educators. | B．TV producers. |
| C．Crime experts. | D．Psychologists. |
According to the author, who need TV most?
| A．Educators. |
| B．Crime experts. |
| C．The old and the lonely. |
| D．The children and their parents. |
We can conclude that ‘television generations’ are_______.
| A．lonely | B．more patient |
| C．more violent | D．more gentle |
People have been painting pictures for at least 30,000 years. The earliest pictures were painted by people who hunted animals. They used to paint pictures of the animals they wanted to catch and kill. Pictures of this kind have been found on the walls of caves in France and Spain. No one knows why they were painted there. Perhaps the painters thought that their pictures would help them to catch these animals. Or perhaps human beings have always wanted to tell stories in pictures.
About 5,000 years ago, the Egyptians and other people in the Near East began to use pictures as kind of writing. They drew simple pictures or signs to represent things and ideas, and also to represent the sounds of their language. The signs these people used became a kind of alphabet.
The Egyptians used to record information and to tell stories by putting picture-writing and pictures together. When an important person died, scenes and stories from his life were painted and carved on the walls of the place where he was buried. Some of these pictures are like modern comic strip stories. It has been said that Egypt is the home of the comic strip. But, for the Egyptians, pictures still had magic power. So they did not try to make their way of writing simple. The ordinary people could not understand it.
By the year 1,000 BC, people who lived in the area around the Mediterranean Sea had developed a simpler system of writing. The signs they used were very easy to write, and there were fewer of them than in the Egyptian system. This was because each sign, or letter, represented only one sound in their language. The Greeks developed this system and formed the letters of the Greek alphabet. The Romans copied the idea, and the Roman alphabet is now used all over the world.
These days, we can write down a story, or record information, without using pictures. But we still need pictures of all kinds: drawing, photographs, signs and diagrams. We find them everywhere: in books and newspapers, in the street, and on the walls of the places where we live and work. Pictures help us to understand and remember things more easily, and they can make a story much more interesting. Pictures of animals were painted on the walls of caves in France and Spain because ______.
| A．the hunters wanted to see the pictures |
| B．the painters were animal lovers |
| C．the painters wanted to show imagination |
| D．the pictures were thought to be helpful |
The Greek alphabet was simpler than the Egyptian system for all the following reasons EXCEPT that _______.
| A．the former was easy to write |
| B．there were fewer signs in the former |
| C．the former was easy to pronounce |
| D．each sign stood for only one sound |
Which of the following statements is TRUE?
| A．The Egyptian signs later became a particular alphabet. |
| B．The Egyptians liked to write comic-strip stories. |
| C．The Roman alphabet was developed from the Egyptian one. |
| D．The Greeks copied their writing system from the Egyptians. |
In the last paragraph, the author thinks that pictures ___________.
| A．should be made comprehensible |
| B．should be made interesting |
| C．are of much use in our life |
| D．have disappeared from our life |
To understand the marketing concept, it is only necessary to understand the difference between marketing and selling. Not too many years ago, most industries concentrated primarily on the efficient production of goods, and then relied on "persuasive salesmanship" to move as much of these goods as possible. Such production and selling focuses on the needs of the seller to produce goods and then convert them into money.
Marketing, on the other hand, focuses on the wants of consumers. It begins with first analyzing the preferences and demands of consumers and then producing goods that will satisfy them. This eye - on - the - consumer approach is known as the marketing concept, which simply means that instead of trying to sell whatever is easiest to produce or buy for resale, the makers and dealers first endeavor to find out what the consumer wants to buy and then go about making it available for purchase.
This concept does not imply that business is benevolent(慈善的) or that consumer satisfaction is given priority over profit in a company. There are always two sides to every business transaction -- the firm and the customer -- and each must be satisfied before trade occurs. Successful merchants and producers, however, recognize that the surest route to profit is through understanding and meeting to customers. A striking example of the importance of meeting to the consumer presented itself in mid - 1985, when Coca Cola changed the flavor of its drink. The non - acceptance of the new flavor by a significant part of the public brought about a prompt(果断的) restoration(恢复) of the Classic Coke, which was then marketed alongside new. King Customer ruled! The marketing concept discussed in the passage is, in fact, __________.
| A．the practice of turning goods into money |
| B．making goods available for purchase |
| C．the customer- centered approach |
| D．a form of persuasive salesmanship |
What was the main concern of industrialists before the marketing concept was widely accepted?
| A．The needs of the market. |
| B．The efficiency of production. |
| C．The satisfaction of the user. |
| D．The preferences of the dealer. |
According to the passage, the underlined part "to move as much of these goods as possible" ( Para. 1 ) means _________.
| A．to sell the largest possible amount of goods |
| B．to transport goods as efficiently as possible |
| C．to dispose of these goods in large quantities |
| D．to redesign these goods for large - scale production |
What does the restoration of the Classic Coke best illustrate?
| A．Traditional goods have a stronger appeal to the majority of people. |
| B．It takes time for a new product to be accepted by the public. |
| C．Consumers with conservative tastes are often difficult to please. |
| D．Products must be designed to suit the taste of the consumer. |
A survey by an international temporary service agency found that U. S. managers believe that people with a sense of humour do better at their jobs, compared with those who have little or no sense of humour. In fact, about 96 percent of those surveyed said people with a sense of humour do better.
The survey went on to point out that the results suggest that a sense of humour may help light-hearted employees keep their jobs during tough times. And, what's more, it may push them up the corporate ladder past their humourless colleagues. Why? It seems that those with a sense of humour are better communicators and better team players.
Studies have shown that happy workers are more productive. In fact, a researcher at California State University found that humour could help the employees to release tension.
Research done by psychologist Dr. Ashton Trice at Mary Baldwin College in Virginia showed that humour helps us think. When people feel stuck on important projects, they tend to feel angry or depressed. According to Dr. Trice's research, taking time out to laugh can help us to get rid of negative feelings and allow us to return to a task or move on to another project unaffected by past defeat.
If humour is really this important, then why don't we use it more often on the job? Most likely, the main reason is that many people are unaware of the positive effects of humour in the workplace. However, it is important to realize that some humour is not suitable for the workplace, and that it is often used at wrong times. Most people think a sense of humour can ________.
| A．help you to do your work better |
| B．make you have a rich life |
| C．make you pleased with your work |
| D．help you to make more friends |
Many people don't use humour more in the workplace because __________.
| A．they like keeping silent when working |
| B．they don't know the positive effects of humour |
| C．they think they should obey the rules |
| D．they don't like joking or laughing |
A person without a sense of humour is easier __________.
| A．to feel surprised |
| B．to get along with |
| C．to be worried |
| D．to be successful |
What is probably the best title for the article?
| A．People with a Sense of Humour. |
| B．Humour Is Important in the Workplace. |
| C．Humour and Humourless. |
| D．Everyone Likes Humour. |