B
Although we already know a great deal about flu, and although the World Health Organizations is constantly collecting detailed information from its chain of flu reference laboratories throughout the world, it is extremely difficult for epidemiologists, who study infectious diseases, to predict when and where the next flu epidemic will occur, and how serious it will be.
There are three kinds of flu virus, known as A, B and C. flu C virus is relatively stable and causes mild infections that do not spread far through the population. The A and B types are unstable, and are responsible for the epidemics that cause frequent concern. Following any virus attack, the human body builds up antibodies （抗体） which can be changed into immunity to that type of virus but a virus with the ability to change its character is able to bypass this protection. Variability（可变性） is less developed in the flu B virus, which affects only human beings. As flu B virus may cause a widespread epidemic but will have little effect if introduced into the same community soon afterwards, since nearly everyone will have built up antibodies and will be immune. The flu A virus, which affects animals also, is extremely unstable and is responsible for some of the worst outbreaks of the disease, such as the world epidemic, of 1918&1919, when about half the world's population were infected and about twenty million people died, some from pneumonia caused by the virus itself and some from secondary complication caused by bacteria. Accurate prediction is difficult because of the complication of the factors. A particular virus may be related to one to which some of the population have partial involved immunity. The extent to which it will spread will depend on factors such as its own strength, or virulence （病毒性）, the ease with which it can be transmitted and the strength of the opposition it encounters （遇到）. Scientists, however, have a reliable general picture of the world situation.
55. Which of the following is the most appropriate title for the passage?
A. Symptoms of Flu B. Man Vs Flu Virus
C. WHO: The Major Organization against Flu Virus D. Variability of Flu Virus
56. What does the author say about the flu B virus?
A. B Virus is relatively stable and causes mild infections that do not spread far through the population.
B. B Virus is unstable, and is responsible for the epidemics that cause frequent concern.
C. B virus is extremely unstable and is responsible for some of the worst outbreaks of the disease.
D. B virus has a very developed variability, and it affects only human beings.
57. Which of the following is NOT mentioned as a factor contributing to the extent to which a virus spreads?
A. The strength of the virus. B. The ease with which the virus can be transmitted.
C. The strength of the opposition. D. The immunity the virus can bring about.
58. This article is quite probably ________.
A. a piece of news B. a special science report
C. an introduction to a book D. a scientific fiction
My mind seems always to return to the day when I met Carl. The city bus stopped at a corner to pick up the daily commuters (someone who travels regularly to and from work), a group in which I was included. Boarding the bus, I looked for a place to sit. At last, I found a place near the back.
The occupant of the seat next to the one I was going for was an older man in a grey suit, well-worn dress shoes, and a black hat like I always pictured reporters wearing, but without the little press card. Seated myself, I began to read the book I had been carrying, which was Jack Kerouac’s On the Road. The man in the seat next to me introduced himself by asking if I had read any other book like the one I was holding. When I told him I had, he seemed to become interested, and so did I. He introduced himself as Carl and asked if I liked jazz, and I told him that I didn’t really listen to it, and that I liked rock and roll. Waiting for Carl to tell me that I should listen to real music, I was shocked when he just smiled and nodded. He said, “You remind me of myself when I was your age. I remember how my parents hated jazz, how they couldn’t see how I could listen to that awful noise. I bet your parents say the same thing, don’t they?” Now it was my turn to smile, amused with how right he was.
As the bus ferried us from one side of the city to the other, Carl and I talked about a lot of different things. The more we talked, the more amazed I became at how much the two of us really had in common, despite the age difference. I haven’t seen him since we parted, but the thought of our connection that day rarely leaves my mind.
Carl really made me think about how much we can learn from each other if we just break through the blocks between us we’ve got. I mean, I would have never thought before that day that I could have anything in common with someone so much older than I, just because of age. But Carl taught me that no matter what, we are all just people, and that we should make an extra effort to try and get to know our neighbors and people we see every day, regardless of age, race, religion, sex, or anything else. If we all take the time to attempt to understand each other, I think that the world would be a much better place that we could share together, as humans.From the first paragraph we know that the author _______.
| A．did not mind whether there was a seat or not |
| B．hoped to have a seat when getting on the bus |
| C．thought the bus was overcrowded |
| D．looked for a seat but failed |
The author usually imagined a reporter as one who _______.
| A．liked jazz music |
| B．enjoyed talking with others |
| C．liked reading Jack Kerouac’s works |
| D．usually wore a black hat and press card |
After talking with Carl, the author realized that _______.
| A．older people were nice to talk to |
| B．he should have known Carl earlier |
| C．his parents were so different from Carl’s in listening to music |
| D．age was not necessarily a problem in heart-to-heart communication |
It can be inferred from the passage that _______.
| A．the author hasn’t seen the old man since then |
| B．jazz music used to be more popular than rock and roll |
| C．the author was not satisfied with human relationships in the world |
| D．Carl made the author realize how much people could learn from each other |
I live in Hollywood. You may think people in such an attractive, fun-filled place are happier than others. If so, you have some mistaken ideas about the nature of happiness.
Many intelligent people still equate happiness with fun. The truth is that fun and happiness have little or nothing in common. Fun is what we experience during an act. Happiness is what we experience after an act. It is a deeper, more long-lasting emotion. Going to an amusement park or ball game, watching a movie or television, are fun activities that help us relax, temporarily forget our problems and maybe even laugh. But they do not bring happiness, because their positive effects end when the fun ends.
I have often thought that if Hollywood stars have a role to play, it is to teach us that happiness has nothing to do with fun. These rich, beautiful individuals have constant access to exciting parties, fancy cars, expensive homes, everything that spells “happiness”. But in memoir(回忆录) after memoir, celebrities reveal the unhappiness hidden beneath all their fun: depression, alcoholism, drug addiction, broken marriages, troubled children, and long-time loneliness.
The way people hold on to the belief that a fun-filled, pain-free life equates happiness actually decreases their chances of ever attaining real happiness. If fun and pleasure are equated with happiness, then pain must be equated with unhappiness. But, in fact, the opposite is true: More times than not, things that lead to happiness involve some pain.
As a result, many people avoid the very efforts that are the source of true happiness. They fear the pain inevitably brought by such things as marriage, raising children, professional achievement, religious commitment, charitable work and self-improvement.According to the passage, “fun activities” ____________.
| A．are the things we do before we find happiness |
| B．may help us relax and forget our problems sometimes |
| C．will lead us to the true happiness |
| D．could provide long-last positive effects |
In the author’s opinion, those Hollywood stars ____________.
| A．possess happiness because they are rich and famous |
| B．experience almost all kinds of happy things |
| C．tell us happiness isn’t equal to fun using their own stories |
| D．have to suffer a lot before they become successful |
It is difficult for people to find real happiness because ____________.
| A．they believe happiness is the fun life without pain |
| B．they find pain equals unhappiness |
| C．they fear to lose what they already have in life |
| D．they are afraid all their efforts were in vain |
The main purpose of the text is to ____________.
| A．describe the difference between happiness and fun |
| B．show the true meaning of happiness |
| C．encourage people to pursue fun activities |
| D．advise people to find their real life |
Gene technology to benefit people
Among all the fast growing science and technology, the research of human genes, or biological engineering as people call it, is drawing more and more attention now. Sometimes it is a hot topic talked about by people.
The greatest thing that gene technology can do is to cure serious diseases that doctors at present can almost do nothing with, such as cancer and heart disease. Every year, millions of people are murdered by these two killers. And to date, doctors have not found an effective way to cure them. But if the gene technology is applied, not only can these two diseases be cured completely, bringing happiness and more living days to the patients, but also the great amount of money people spend on curing their diseases can be saved, therefore it benefits the economy as well. In addition, human life can be longer.
Gene technology can help people to give birth to more healthy and clever children. Some families, with the English imperial family being a good example, have hereditary (遗传的) diseases. This means their children will for sure have the family disease, which is a great trouble for these families. In the past, doctors could do nothing with hereditary diseases. But gene technology can solve this problem perfectly. The scientists just need to find the wrong gene and correct it, and a healthy child will be born.
Some people are worrying that the gene research can be used to make human beings in large quantities. In the past few years, scientists have succeeded in cloning babies will not come out in large quantities, for most couples in the world can have babies in very normal way. Of course, the governments must take care to control gene technology.What does “these two killers” in the second paragraph refer to?
| A．Gene technology and another treatment of the two diseases. |
| B．The two murderers who killed the cloned baby. |
| C．Hereditary disease and cancer. |
| D．Cancer and heart disease. |
In what way can gene technology help to treat hereditary diseases?
| A．Using gene technology, a scientist finds the wrong gene and corrects it. |
| B．Using gene technology, people with hereditary diseases can live longer. |
| C．Using gene technology, human babies can also be cloned. |
| D．Doctors can cure cancer and heart disease with the help of gene technology. |
What is the main purpose of writing the text?
| A．Explaining that gene technology will also do great harm to human race. |
| B．Telling the readers the positive effects gene technology has on people’s life. |
| C．Expressing the writer’s idea that gene technology will benefit people. |
| D．Informing people that gene technology helps clone babies in large quantities. |
The Basics of Math—Made Clear
Basic Math introduces students to the basic concepts of mathematics, as well as the fundamentals of more tricky areas. These 30 fantastic lectures are designed to provide students with an understanding of arithmetic(算数) and to prepare them for Algebra (代数) and beyond.
The lessons in Basic Math cover every basic aspect of arithmetic. They also look into exponents (指数), the order of operations, and square roots. In addition to learning how to perform various mathematical operations, students discover why these operations work, how a particular mathematical topic relates to other branches of mathematics, and how these operations can be used practically.
Basic Math starts from the relatively easier concepts and gradually moves on to the more troublesome ones, so as to allow for steady and sure understanding of the material by students. The lectures offer students the chance to “make sense” of mathematical knowledge that may have seemed so frightening. They also help students prepare for college mathematics and overcome their anxiety about this amazing — and completely understandable — field of study.
By the conclusion of the course, students will have improved their understanding of basic math. They will be able to clear away the mystery (神秘性) of mathematics and face their studies with more confidence than they ever imagined. In addition, they will strengthen their ability to accept new and exciting mathematical challenges.
Professor H. Siegel, honored by Kentucky Educational Television as “the best math teacher in America,” is a devoted teacher and has a gift for explaining mathematical concepts in ways that make them seem clear and obvious. From the basic concrete ideas to the more abstract problems, he is a master in making math lectures learner-friendlier and less scary.
With a PhD in Mathematics Education from Georgia State University, Dr. Siegel teaches mathematics at Central Arizona College. His courses include various make-up classes and a number of lectures for future primary school teachers.
If the course fails to provide complete satisfaction to you, you can easily exchange it for any other course that we offer. Or you can get your money back.What does the course Basic Math mainly cover?
| A．Arithmetic. | B．College Mathematics. |
| C．Algebra. | D．Mathematics Education. |
What benefits can students expect from Basic Math?
| A．Stronger imaginative ability. |
| B．Additional presentation skills. |
| C．Greater chances of becoming teachers. |
| D．More mathematical confidence. |
What can we learn about Professor H. Siegel?
| A．He is a guest lecturer at Kentucky Educational Television. |
| B．He works in Georgia State University. |
| C．He is to deliver 30 lectures in Basic Math. |
| D．He specializes in training teachers. |
Where is the passage most likely to have been taken from?
| A．A news report. | B．An advertisement |
| C．A lesson plan. | D．A book review |
You’ve just come home, after living abroad for a few years. Since you’ve been away, has this country changed for the better or for the worse?
If you’ve just arrived back in the UK after a fortnight’s holiday, small changes have probably surprised you—anything from a local greengrocer suddenly being replaced by a mobile-phone shop to someone in your street moving house.
So how have things changed to people coming back to Britain after seven, ten or even 15 years living abroad? What changes in society can they see that the rest of us have hardly noticed—or now take for granted? To find out, we asked some people who recently returned.
Debi: When we left, Cheltenham, my home town, was a town of white, middle-class families—all very conservative (保守的).The town is now home to many eastern Europeans and lots of Australians, who come here mainly to work in hotels and tourism. There are even several shops only for foreigners.
Having been an immigrant (移民) myself, I admire people who go overseas to find a job. Maybe if I lived in an inner city where unemployment was high, I’d think differently, but I believe foreign settlers have improved this country because they’re more open-minded and often work harder than the natives.
Christine: As we flew home over Britain, both of us remarked how green everything looked. But the differences between the place we’d left behind and the one we returned to were brought sharply into focus as soon as we landed.
To see policemen with guns in the airport for the first time was frightening — in Cyprus, they’re very relaxed — and I got pulled over by customs officers just for taking a woolen sweater with some metal-made buttons out of my case in the arrivals hall. Everyone seemed to be on guard. Even the airport car-hire firm wanted a credit card rather than cash because they said their vehicles had been used by bank robbers. But anyway, this is still a green, beautiful country. I just wish more people would appreciate what they’ve got.After a short overseas holiday, people tend to ______ .
| A．expect small changes | B．notice small changes |
| C．welcome small changes | D．exaggerate (夸大) small changes |
How does Debi look at the foreign settlers?
| A．Cautiously. | B．Skeptically. | C．Positively. | D．Critically. |
When arriving at the airport in Britain, Christine was shocked by ______ .
| A．the tight security | B．the messy arrivals hall |
| C．the relaxed policemen | D．the bank robbers |
Which might be the best title for the passage?
| A．Life in Britain. | B．Britain in Memory. |
| C．Britain in Future. | D．Back in Britain. |