In today’s world, we rely on computers as never before. They are used for everything from ordering a pizza to running hospitals and military defense systems. Banking and credit card information is stored and accessed by computers. So what happens when a computer gets infected with a virus? One effect is that people’s access to their e-mail accounts is cut off. A more serious possible consequence is that billions of dollars could be lost.
A virus is a computer program that copies itself onto other programs and infects them. Similar to an easily spread disease, a computer virus goes from computer to computer, either adding to or changing the tasks a program is designed to do.
The first computer viruses were created in the mid’80s and had varying effects. Some caused files to be deleted, or made the letters on the screen appear to fall off. Others displayed a specific message once the computer was turned on.
Viruses today are much more widespread and dangerous than ever before. Perhaps the most damaging has been the “I Love You” virus. “I Love You” appeared in May 2000 and has possibly been the most destructive virus in terms of monetary loss.
The virus is released（释放） when an attachment（附件） to a fake e-mail message is opened. By changing the names of files on computers, “I Love You” makes them difficult to access. It also searches for important personal information, including passwords, which it sends to a Web site for others to see.
It is estimated that more than 45 million people in 20 countries have had their computers infected by the “I Love You” virus. Some say the cost of repair and lost business has been more than US$10 billion.
If you own a computer, it is important to keep it in good health by installing（安装） an anti-virus program. If updated frequently, it will protect your e-mail access-----not to mention y
our wallet.
51. What does “virus” mean in the article?
A. An easily spread disease.
B. A contagious (传染的) computer program.
C. An extremely small organism（微生物）which causes disease.
D. A parasite（寄生虫）in computer.
52. How dose “I Love You” virus spread?
A. It is spread when an e-mail account is opened.
B. It is spread through on-line chatting.
C. It is spread through e-mail.
D. It spread from web site to web site.
53. Which of the following is one of the damages brought by “I Love You” virus?
A. It deletes files.
B. It automatically turns on computers.
C. It automatically turns off computers.
D. It makes it difficult to access files.
54. Which of the following is the best way to guard against virus?
A. To load an up-to-date anti-virus program into our computer.
B. Not to use an e-mail account.
C. To upgrade our computer.
D. Not to use the Internet.
55. What is the purpose of the article?
A. To warn us against virus.
B. To remind us the imp
ortance of being healthy.
C. To stress the importance of computer.
D. To alert us to economic loss.
China is going green.In order to reduce air pollution and oil shortages, automobile manufacturers have announced their plans to develop hybrid vehicles (混合燃料汽车) for the Chinese market. Toyota's hybrid car Prius will be ready to drive in China this week. Let's have a look at the new car.
Any vehicle is a hybrid when it combines two or more sources of power. Hybrid cars run off a rechargeable battery and gasoline. Hybrid cars have special engines, which are smaller than traditionalgasoline engines. They run at 99 percent of their power when the car is cruising (匀速行驶). A speciallydesigned battery motor provides extra power for running up hills or when extra acceleration is needed.
Step into a Prius, and turn on the engine. The first thing you notice is how much quieter it is than atraditional car. At this point, the car's gasoline engine is dormant (休眠). The electric motor will providepower until the car reaches about 24 km/h. If you stay at a low speed, you are effectively driving an electric car, with no gasoline being used, and no waste gas gives off.
The onboard(车载的) computer makes the decision about when to use a gas engine, when to goelectric, and when to use a combination of the two. If you go over 24 km/h, when you step on the gas pedal (油门), you are actually telling the computer how fast you want to go.
The electronic motor recharges automatically using a set of batteries. When driving at high speed, the gasoline engine not only powers the car, but also charges the batteries. Any time you use the brake, the electric motor in the wheels will work like a generator and produce electricity to recharge the batteries.As a consequence, the car's batteries will last for around 200,000 miles.The author writes this passage mainly to________.
| A．teach people how to drive a hybrid car |
| B．show how to save their gasoline when driving a car |
| C．introduce a new kind of "green" car |
| D．announce plans to develop hybrid vehicles for China |
The first sentence probably refers to ________.
| A．there will be more and more green land in China |
| B．China has started producing environmentally friendly cars |
| C．China's new cars are combinations of different green models |
| D．China is still young and lacking experience |
What is the most important feature of hybrid cars?
| A．They have smaller engines than traditional gasoline ones. |
| B．They are much quieter than traditional cars. |
| C．They only use 99 percent of their power to run up hills. |
| D．They are powered by both a rechargeable battery and gasoline. |
It was time for Mr. Rocco to shut up shop when I hurried into the florist’s. “Now, what is it that you want?” Mr. Rocco turned to me. “I want the most beautiful flower you have.” I replied, “And just how much do you have to pay for this most beautiful flower?” I held out a wet hand showing a quarter and dime. He nodded, and then showed me a plant on the counter “I can give you this one for 35 cents.” he said，“ Aw, gee,” I protested, “it looks like a weed!” About l 8 inches high, the plant was in a small pot covered with faded red paper.“ Now trust me, boy---I promise that tomorrow morning when you get up, you will find your most beautiful flower. ”said Mr. Rocco. I knew him to be a good honest man, so I agreed to take it.
It was almost midnight when I arrived home. Mom was seriously sick and using the front bedroom. I looked in to see if she was asleep, and then quietly tiptoed in and set the plant on the table beside her bed. I wanted her to be surprised when she woke on Mother’s Day. The next morning, I dressed and hurried downstairs. The sun was shining through kitchen window as I looked into Mom’s room. She motioned for me to come in, then glanced over at the table where the plant was. Holy mackerel! There were three big yellow trumpet-shaped blooms. It was just like Mr. Rocco said---the most beautiful flower I ever saw! When I looked at Mom, she was smiling as tears streamed down her cheeks. She held out her hand for me to come near, then pulled me close and hugged till it hurt. Then, remembering her contagious condition and that she wasn’t supposed to touch me, she quickly let me go.
My dear Mom died the next night. The moment she hugged me turned out to be the most wonderful moment of my life. Not only had that beautiful plant helped show just how much I loved her, but I'd always know how much she loved me. The author didn’t like the plant recommended by Mr. Rocco at first because ________.
| A．the packing of the plant was shabby |
| B．the plant was actually a weed |
| C．the plant appeared too ordinary to be the most beautiful |
| D．he thought Mr. Rocco was reluctant to do the deal with him |
Mother’s condition was contagious (Line 6, Para 3) for .
| A．she was at the death’s door |
| B．she suffered from the illness |
| C．others were sick of her appearance |
| D．virus might spread from her to others |
When mother hugged the author tightly, she was showing that ____ .
| A．she liked being given gifts |
| B．she valued what the author had done for her |
| C．she was aware of the approaching death |
| D．she was touched by the beauty of the flower |
Which may be the best title of the passage?
| A．Flowers of Love | B．A Son’s Love for Mother |
| C．Low Price, High Value | D．A Special Mother’s Day |
All over the world, and for many different reasons, there are millions of people who rarely or never eat meat. These people are called vegetarians. To people who eat meat, being a vegetarian may seem like a very strange thing, diets for several different reasons.
First, vegetarians have an enormous health advantage. One of the major health problems in modern societies is not too much protein but too much fat, especially in the form of animal fats. Medical evidence suggests that animal fats, including butter, contribute to the development of cholesterol in the human body. High amount of cholesterol seem to be part of the cause of heart disease. Most vegetarians have low level of cholesterol. High amounts of animal fats also seem to lead to certain kinds of cancer, and vegetarians are typically less vulnerable to these cancers than people who eat a lot of meat. Overall, studies comparing the health of vegetarians and meat-eaters show that the meat-eaters are twice as likely to die of heart disease as vegetarians are.
Better health is one reason that people choose to become vegetarians. Another reason is religion. Some religions forbid the eating of meat. The largest of these is the Hindu religion, which has about 600 million believers in the world. Although not all Hindus are vegetarian, many are, and there are many believers of other religions such Buddhism and even some Christian religions that also do not eat meat.
Many vegetarians do not eat meat simply because they do not like the taste of it. They have no religious or philosophical reasons; they just do not like meat. Another important reason that vegetarians give for not eating meat is the health advantages that were given above. Lastly, there are many people who do not eat meat because they just do not like the idea of killing animals for food. They believe that life, all life, is valuable , and that we do not have to destroy life to feed ourselves when there are other good sources of food.According to the passage, people choose to be vegetarians for the following reasons EXCEPT________.
| A．they want to stay healthy |
| B．they are too kind to put the idea of killing animals |
| C．they live in areas where meat supply is not adequate |
| D．they should not eat meat due to their religious belief |
Which of the following is true according to Paragraph 2 ?
| A．Vegetarians enjoy a more healthy life than the meat eaters. |
| B．Heart disease and cancer are caused by large amounts of protein. |
| C．There are twice as many meat-eaters as vegetarians who die of cancer. |
| D．There are less health problems in modern society due to advanced medical care. |
What does “vulnerable” mean in Paragraph 2?
| A．Having low level of cholesterol. |
| B．Having high level of cholesterol. |
| C．Having weak ability to resist diseases and harms. |
| D．Having strong ability to resist disease and harms. |
It can be inferred from the passage that __________.
| A．being a vegetarian may be a very strange thing |
| B．vegetarians eat meat on some special occasions |
| C．all vegetarians have reasons for their not eating meat |
| D．most vegetarians believe that life without meat is happy. |
A new planet-hunting technique has detected the most earth-like planet yet around a star other than our sun, raising hopes of finding a space rock that might support life, astronomers (天文学家) reported recently.
“This is an important discovery to answer the question ‘Are we alone?’” said Michael Turner of the National Science Foundation.
“The team has discovered the most earth-like planet yet, and more importantly, has proved the power of a new technique that is sensitive (灵敏的) to detecting planets that are fit for people to live on,” Turner said in a statement.
In the last decade, astronomers have detected more than 160 planets moving around stars outside our solar system. Most of these have been gas giant planets like Jupiter, which are unfit for life.
But an international team has detected a cold planet about 5.5 times more massive than the earth — still small enough to be considered earth-like — moving around a star about 20,000 light years away, close to the center of the Milky Way.
To find this new planet, the team used a technique called gravitational microlensing (引力微观透镜法). When a planet is circling the closest star, the planet’s gravity can add its own signature to the light. This kind of light signature was observed on July 11 by a group of telescopes in a project known as OGLE, short for Optical Gravitational Lensing Experiment.
“The main advantage of microlensing is the signals for low-mass planets: They’re not weak signals. They’re just rare,” Bennett of the University of Notre Dame in Indiana said by telephone. “If there happens to be a straight line between a foreground star with its planet and the background source star, then you’re able to detect that planet.”The underlined word “detected” in Paragraph 1 probably means “_________”.
| A．discovered | B．destroyed |
| C．created | D．searched |
The author’s purpose in writing this passage is to ____.
| A．prove that scientists have a lot of difficulties in doing scientific research |
| B．explain why this planet moves around a star like our sun |
| C．teach the readers some basic knowledge about the universe |
| D．tell people about a new technique that finds the most earth-like planet moving round another star |
From the news report we can infer that _________.
| A．the planet is like the earth because it is close to the center of the Milky Way |
| B．it is quite possible that life may exist on other planets in the universe |
| C．people have no interest in finding a planet that might support life |
| D．the question “Are we alone” is too difficult for scientists to answer |
Which of the following statements is NOT true according to the passage?
| A．The signals coming from low-mass planets are too weak to be noticed. |
| B．Most of the discovered planets are not fit for people to live on. |
| C．If a star with its planet happens to be in line with the source star, then the planet can be found. |
| D．The power of the new technique is proved by the discovery of the earth-like planet. |
When students and parents are asked to rate subjects according to their importance, the arts are unavoidably at the bottom of the list. Music is nice, people seem to say, but not important. Too often it is viewed as mere entertainment, but certainly not an education priority（优先）. This view is shortsighted. In fact, music education is beneficial and important for all students.
Music tells us who we are. Because music is an expression of the beings who create it, it reflects their thinking and values and the social environment it came from. Rock music represents a lifestyle just as surely as does a Schubert song. The jazz influence that George Gershwin and other musicians introduced into their music is obviously American because it came from American musical traditions. Music expresses our character and values. It gives us identity as a society.
Music provides a kind of perception（感知）that cannot be acquired any other way. Science can explain how the sun rises and sets. The arts explore the emotive meaning of the same phenomenon. We need every possible way to discover and respond to our world for one simple but powerful reason: No one way can get it all.
The arts are forms of thoughts as powerful in what they communicate as mathematical and scientific symbols. They are ways we human beings “talk” to each other. They are the language of civilization through which we express our fears, our curiosities, our discoveries, our hopes. The arts are ways we give form to our ideas and imagination so that they can be shared with others. When we do not give children access to an important way of expressing themselves such as music, we take away from them the meanings that music expresses.
Science and technology do not tell us what it means to be human. The arts do. Music is an important way we express human suffering, celebration, the meaning and value of peace and love.
So music education is far more necessary than people seem to realize.According to Paragraph 1, students _______.
| A．disagree with their parents on education |
| B．regard music as a way of entertainment |
| C．view music as an overlooked subject |
| D．prefer the arts to science |
In Paragraph 2, the author uses jazz as an example to _______.
| A．compare it with rock music |
| B．introduce American musical traditions |
| C．show music identifies a society |
| D．prove music influences people’s lifestyles |
According to the passage, the arts and science _______.
| A．approach the world from different angles |
| B．explore different phenomena of the world |
| C．express people’s feelings in different ways |
| D．explain what it means to be human differently |
What is the main idea of the passage?
| A．Music is an effective communication tool. |
| B．Music should be of top education priority. |
| C．Music makes students more imaginative |
| D．Music education deserves more attention. |