On October 12,1989,some British scientists were working at the computers to look for the information they needed.Suddenly they saw a lot of very bright points crossing the computer screens.At the same time the computers were working much slower.To find out what was happening they stopped their work to check some parts of the computers.To their horror,they found out that most of their stored information was got rid of by computer viruses(病毒)!Clearly all these computers had been infected by computer viruses.
It is said that the computer viruses were made by a group of young men fond of playing tricks.They all had excellent education.They created the viruses just to show their intelligence. These kinds of computer viruses are named Jerusalem Viruses.These viruses can stay in computers for a long time.When the time comes they will attack(袭击)the computers by lowering the functions,damaging their normal programs or even getting rid of all the information.
We now come to know that Jerusalem Viruses often attack computers on Friday and that they are spreading(传播)to a lot of computers.Among the countries that were attacked by computer viruses last year are Britain,Australia,Switzerland and the U.S.But till now,how to get rid of the terrible viruses remains a problem.
【小题1】When the viruses attack the computers,the computers will work________.
A.normally | B.slowly | C.faster | D.well |
A.damage the computers |
B.test their ability |
C.tell people that they were intelligent |
D.play a trick on users of the computers |
A.have been in nature for years |
B.stay in any computers |
C.be difficult to get rid of at present |
D.be able to be got rid of in the near future |
A.Last year six countries found their computers were infected by viruses. |
B.The viruses will come to a new computer after staying in the old one for some time. |
C.Scientists are trying to find a way to get rid of the viruses. |
D.The Jerusalem Viruses are dangerous to human health. |
【小题1】B
【小题2】C
【小题3】C
【小题4】C
解析【小题1】答案 B [细节理解题。根据第一段第三句话At the same time the computers were working much slower.可知,感染病毒的计算机速度减慢。]
【小题2】答案 C [细节理解题。由第二段中的“just to show their intelligence”推知。]
【小题3】答案 C [推理判断题。本文最后一句But till now,how to get rid of the terrible viruses remains a problem.暗示现在人们还未找到消除计算机病毒的好办法。]
【小题4】答案 C [细节理解题。科学家们正在想办法消除病毒。]
科目:高中英语 来源: 题型:阅读理解
A team of engineers at Harvard University has been inspired by Nature to create the first robotic fly. The mechanical fly has become a platform for a series of new high-tech integrated systems. Designed to do what a fly does naturally, the tiny machine is the size of a fat housefly. Its mini wings allow it to stay in the air and perform controlled flight tasks.
“It’s extremely important for us to think about this as a whole system and not just the sum of a bunch of individual components (元件),” said Robert Wood, the Harvard engineering professor who has been working on the robotic fly project for over a decade. A few years ago, his team got the go-ahead to start piecing together the components. “The added difficulty with a project like this is that actually none of those components are off the shelf and so we have to develop them all on our own,” he said.
They engineered a series of systems to start and drive the robotic fly. “The seemingly simple system which just moves the wings has a number of interdependencies on the individual components, each of which individually has to perform well, but then has to be matched well to everything it’s connected to,” said Wood. The flight device was built into a set of power, computation, sensing and control systems. Wood says the success of the project proves that the flying robot with these tiny components can be built and manufactured.
While this first robotic flyer is linked to a small, off-board power source, the goal is eventually to equip it with a built-in power source, so that it might someday perform data-gathering work at rescue sites, in farmers’ fields or on the battlefield. “Basically it should be able to take off, land and fly around,” he said.
Wood says the design offers a new way to study flight mechanics and control at insect-scale. Yet, the power, sensing and computation technologies on board could have much broader applications. “You can start thinking about using them to answer open scientific questions, you know, to study biology in ways that would be difficult with the animals, but using these robots instead,” he said. “So there are a lot of technologies and open interesting scientific questions that are really what drives us on a day to day basis.”
【小题1】The robotic fly project has been conducted __________.
A.just by accident |
B.within a decade |
C.just by a professor |
D.for more than ten years |
A.they had no model in their mind |
B.they did not have sufficient time |
C.they had no ready-made components |
D.they could not assemble the components |
A.The robotic flyer is designed to learn about insects. |
B.Animals are not allowed in biological experiments. |
C.There used to be few ways to study how insects fly. |
D.Wood’s design can replace animals in some experiments. |
A.Father of Robotic Fly |
B.Inspiration from Engineering Science |
C.Robotic Fly Imitates Real Life Insect |
D.Harvard Breaks Through in Insect Study |
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科目:高中英语 来源: 题型:阅读理解
The health of millions could be at risk because medicinal plants are being used up.These plants are used to make traditional medicine,including drugs to fight cancer.“The loss of medicinal plants is a quiet disaster,”says Sara Oldfield,secretary general of the NGO Botanic Gardens Conservation International.
Most people worldwide (including 80 percent of all Africans)rely on herbal medicines(草药)which are got mostly from wild plants.But some 15,000 of the 50,000 medicinal species are under threat of dying out,according to a report from the international conversation group Plantlife.Shortages have been reported in China,India,Kenya,Nepal,Tanzania and Uganda.
Over?harvesting does the most harm,though pollution and competition from invasive(侵略性的)species are both responsible.“Businessmen generally harvest medicinal plants,not caring about sustain ability,”the Plantlife report says.“Damage is serious partly because they have no idea of it,but it is mainly because such collection is unorganized.” Medicinal trees at risk include the Himalayan yew and the African cherry,which are used to treat some cancers.
The solution,says the report's author,Alan Hamilton,is to encourage local people to protect these plants.Ten projects studied by Plantlife in India,Pakistan,China,Nepal,Uganda and Kenya showed this method can succeed.In Uganda the project has kept a sustainable supply of low?cost cancer treatments,and in China a public run medicinal plant project has been created for the first time.
“Improving health,earning an income and keeping cultural traditions are important in encouraging people to protect medicinal plants,”says Hamilton.“You have to pay attention to what people are interested in.” Ghillean Prance,the former director of the Royal Botanic Gardens at Kew in London,agrees that medicinal plants are in need of protection.
“Not nearly enough is being done,”he told New Scientist.“We are destroying the very plants that are of most use to us.”
【小题1】What is the passage mainly about?
A.The function of medicinal plants. |
B.The importance of traditional medicine. |
C.More and more people rely on herbal medicines. |
D.The dangerous situation of medicinal plants and ways of protecting them. |
A.About 30% of medicinal species are at risk of dying out. |
B.Medicinal plants are mainly used to treat cancers. |
C.80% of African countries are reported to be short of medicinal plants. |
D.The problem of the loss of medicinal plants appeared suddenly. |
A.A lack of knowledge of sustainability. |
B.Invasion by other species. |
C.Environmental pollution. |
D.Improper harvesting. |
A.Improving people's health. |
B.Letting people earn more. |
C.Working together with the government. |
D.Persuading the locals to protect them. |
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科目:高中英语 来源: 题型:阅读理解
Choosing the Right Resolution (决定)
Millions of Americans began 2014 with the same resolution they started 2013 with, a goal of losing weight. However, setting weight loss as a goal is a mistake.
To reach our goal of losing weight --- the output, we need to control what we eat --- the input ( 输入). That is, we tend to care about the output but not to control the input. This is a bad way to construce goals. The alternative is to focus your resolution on the input. Instead of resolving to lose weight, try an actionable resolution: “I’ll stop having desert for lunch,” or “I’ll walk every day for 20 minutes.” Creating a goal that focuses on a well-specified input will likely be more effective than concentrating on the outcome.
Recently a new science behind incentives (激励) , including in education, has been discussed. For example, researcher Roland Fryer wanted to see what works best in motivating children to do better in school. In some cases, he gave students incentives based on input, like reading certain books, while in others, the incentives were based on output, like results on exams. His main finding was that incentives increased achievement when based on input but had no effect on output. Fryer’s conclusion was that the intensives for inputs might be more effective because do not knoe how to do better on exam, aside from general rules like “study harder.” Reading certain books, on the other hand, is a well-set task over which they have much more control.
As long as you have direct control over your goal, you have a much higher chance of success. And it’s easier to start again if you fail, because you know exactly what you need to do.
If you want to cut down on your spending, a good goal would be making morning coffee at home instead of going to a cafe, for example. This is a well-specified action-based goal for which you can measure your success easily. Spending less money isn’t a goal because it’s too general. Similarly, if you want to spend more time with your family, don’t stop with this general wish. Think bout an actionable habit that you could adopt and stick to, like a family movie night every Wednesday.
In the long run, these new goals could become a habit.
【小题1】The writer thinks that setting weight loss as a goal is a mistake because _______ .
A.it is hard to achieve for most Americans |
B.it is focused too much on the result |
C.it is dependent on too many things |
D.it is based on actionable decisions |
A.they obeyed all the general rules |
B.they paid more attention to exams |
C.they were motivated by their classmates |
D.they were rewarded for reading some books |
A.“I’ll give up desert.” |
B.“I’ll study harder.” |
C.“I’ll cut down my expense” |
D.“I’ll spend more time with my family” |
A.develop good habits and focus on the outcome |
B.be optimistic about final goals and stick to them |
C.pick specific actions that can be turned into good habits |
D.set ambitious goals that can balance the input ang output |
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科目:高中英语 来源: 题型:阅读理解
If you could be anybody in the world, who would it be? Your neighbour or a super star? A few people have experienced what it might be like to step into the skin of another person, thanks to an unusual virtual reality(虚拟现实)device. Rikke Wahl, an actress, model and artist, was one of the participants in a body swapping experiment at the Be Another lab, a project developed by a group of artists based in Barcelona. She swapped with her partner, an actor, using a machine called The Machine to Be Another and temporarily became a man. "As I looked down, I saw my whole body as a man, dressed in my partner's pants," she said. "That's the picture I remember best."
The set-up is relatively simple. Both users wear a virtual reality headset with a camera on the top. The video from each camera is sent to the other person, so what you see is the exact view of your partner. If she moves her arm, you see it. If you move your arm, she sees it.
To get used to seeing another person's body without actually having control of it, participants start by raising their arms and legs very slowly, so that the other can follow along. Eventually, this kind of slow synchronised(同步的)movement becomes comfortable, and participants really start to feel as though they are living in another person's body.
Using such technology promises to alter people's behaviour afterwards-potentially for the better. Studies have shown that virtual reality can be effective in fighting racism-the bias(偏见)that humans have against those who don't look or sound like them. Researchers at the University of Barcelona gave people a questionnaire called the Implicit Association Test, which measures the strength of people's associations between, for instance, black people and adjectives such as good, bad, athletic or awkward. Then they asked them to control the body of a dark skinned digital character using virtual reality glasses, before taking the test again. This time, the participants' bias scores were lower. The idea is that once you've "put yourself in another's shoes" you're less likely to think ill of them, because your brain has internalised the feeling of being that person.
The creators of The Machine to Be Another hope to achieve a similar result. "At the end of body swapping, people feel like holding each other in their arms," says Arthur Pointeau, a programmer with the project. "It's a really nice way to have this kind of experience. I would really, really recommend it to everyone."
【小题1】The word "swapping" (paragraph 1) is closest in meaning to______.
A.building | B.exchanging | C.controlling | D.transplanting |
A.our feelings are related to our bodily experience |
B.we can learn to take control of other people's bodies |
C.participants will live more passionately after the experiment |
D.The Machine to Be Another can help people change their sexes |
A.they fought strongly against racism |
B.they scored lower on the test for racism |
C.they changed their behaviour dramatically |
D.they were more biased against those unlike them |
A.technology helps people realize their dreams |
B.our biases could be eliminated through experiments |
C.virtual reality helps promote understanding among people |
D.our points of view about others need changing constantly |
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科目:高中英语 来源: 题型:阅读理解
Depression (抑郁症) is a serious problem today.Depression causes workers to be unproductive,causing companies and countries to lose billions of dollars.One expert says that depression is like cancer because it is “widespread,costly and deadly”.Depression hits one person in five around the world.
Although people have believed depression to be a problem among the rich and educated,studies show that depression is a problem among everyone.Over any sixmonth period,between five to seven percent of the world’s population will be suffering from a serious depression.Suicide rates among people suffering from the disease in its extreme,or clinical form were 80 percent higher than in the population at large,and sufferers were four times more likely to have heart attacks.People who suffer from depression often have problems sleeping,getting up on time,and doing work productively.
Depression,which researchers agree has its origin in the genes,brings loss of confidence and ability to concentrate—making it impossible for employees and managers to work efficiently.
Depression is made more serious in China by Chinese’s inability to face it.Many people believe that depressed people are either weak or lazy.Besides,there is no good treatment,with few specialists available.“Most patients in China just don’t get help,”a Chinese doctor says.“In my hospital,I have to see 30 or 40 patients in a morning,just have time to say ‘Hello,how do you feel?’”
In Western countries,people are not afraid to admit that they have depression,but most do not tell it to their boss,because they fear that they will be stricken_off_the_rolls.“In my experience,aging bosses are the most willing to admit they have it.Because they feel the most secure about themselves,” an American doctor says.
Hopefully,in the near future,people around the world will be able to admit that they have depression so that they can get the right treatment.
【小题1】Which of the following is true according to the passage?
A.It is widely believed that everyone may suffer from depression. |
B.Depression brings great problems to its sufferers in their life and work. |
C.Depression is a commonlyexisting problem only in rich countries. |
D.The poorer and the less educated a person is,the less he will suffer from depression. |
A.very unconfident and often absentminded |
B.easy to avoid being hit by heart attacks |
C.working efficiently and productively |
D.either weak or lazy |
A.the understanding of the problem |
B.the lack of treatment and doctors |
C.their unwillingness to tell it to their boss |
D.the doctors’ careless work |
A.People are suffering from depression because of the shortage of specialists. |
B.The aging bosses around the world dare to say they are depressed. |
C.More and more patients will turn to specialists for help. |
D.Western people are braver than Chinese people. |
A.Hired. | B.Dismissed. |
C.Promoted. | D.Recommended. |
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科目:高中英语 来源: 题型:阅读理解
What's going to happen in the future? Will robots take over our planet? Will computers become smarter than us? Not likely. But here are some things that scientists say are most likely to happen 10 to 30 years later from now, according to the BBC.
1.Digital money
We used to pay with cash for everything we bought. Now when we swipe(刷) our bus pass or use a credit card to shop online, money is spent without us even seeing it. In fact, we are already using one type of digital money.
You have to admit that using a card is much easier than searching your pockets for change. It is also safer than carrying a lot of cash.
When ATM cards were first introduced, they were not accepted everywhere. But now it's hard to live without them. People in Sweden completely stopped using cash last year, according to the Associated Press, and the US might be next.
2.Bionic(能力超人的)eye
It's no longer something only in a scifi movie. People who are blind may have a chance to get their sight back—by wearing bionic eyes.
A blind eye can no longer sense light, but a bionic eye can use a camera to “see” the environment and send data directly to the brain.
Although the bionic eye that's out now only allows patients to see lights and unclear shapes, a highresolution(高清晰度的) version could be just a few years away.
3.Selfdriving cars
Everything is going automatic these days—washing machines, ticket selling machines and even cars. Unlike a human driver, a selfdriving car won't get distracted by a phone call, the radio or something outside the window. Sensors and cameras on the car would allow it to stick strictly to the rules of the road and keep a safe distance from other cars. This would greatly reduce the number of road accidents. You could even take a nap while the car drives itself.
Many vehicle companies are now planning selfdriving cars. “By 2040, driverless vehicles will be widely accepted and possibly be the dominant vehicles on the road,” said Jeffrey Miller, professor at the University of Alaska Anchorage, US, in Wired magazine.
【小题1】The underlined word “distracted” in the article is closest in meaning to “________”.
A.directed | B.discouraged |
C.attacked | D.disturbed |
A.optimistic | B.pessimistic |
C.doubtful | D.cautious |
A.Learning Kit | B.Campus Trends |
C.Entertainment | D.Technology |
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科目:高中英语 来源: 题型:阅读理解
Scientists at Royal Holloway, University of London and Queen Mary, University of London have discovered that bees learn to fly the shortest possible route between flowers even if they discover the flowers in a different order. Bees are effectively solving the “traveling salesman problem”, and they are the first creatures found to do this.
The traveling salesman must find the shortest route that allows him to visit all locations on his route. Computers solve it by comparing the length of all possible routes and choosing the shortest, and it can keep computers busy for days. However, bees solve it without computer assistance using a brain the size of grass seed. Dr. Nigel Raine, from the School of Biological Sciences at Royal Holloway explains, “Bees solve traveling salesman problems every day. They visit flowers at multiple locations and because bees use lots of energy to fly, they find a route which keeps flying to a minimum. ”
The team used the computer to control artificial flowers to test whether bees would follow a route defined by the order in which they discovered the flowers or if they would find the shortest route. After exploring the location of the flowers, bees quickly learned to fly the shortest route.
As well as improving our understanding of how bees move around the landscape pollinating(授粉)crops and wild flowers, this research, which is due to be published in The American Naturalist, has other applications. Our lifestyle relies on networks such as traffic on the roads, information flow on the Web and business supply chains. By understanding how bees can solve their problems with such a tiny brain, we can improve our management of these everyday networks without needing lots of computer time. Dr. Raine adds, “Despite their tiny brains, bees are capable of extraordinary feats of behavior. We need to understand how they can solve the traveling salesman problem without a computer. ”
【小题1】 What would be the best title of the passage?
A.Bees help salesmen travel |
B.Tiny-brained bees solve a complex mathematical problem |
C.How bees discover the flowers |
D.How to solve the “traveling salesman problem” |
A.can be solved by a computer easily |
B.can’t even be solved by a computer |
C.can puzzle both people and computers |
D.remains to be solved by scientists |
A.provide further proof for the research |
B.tell us how bees can fly the shortest route between flowers |
C.tell us how the research about bees’ flying route was conducted |
D.explain the importance of the research |
A.all creatures are smarter than computers |
B.the research about bees’ flying route can be applied to many fields |
C.our networks are more complex than bees’ ones |
D.with the help of the computer we can find out how bees can solve the “traveling salesman problem” |
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科目:高中英语 来源: 题型:阅读理解
Are you interested in country music?I like it very much !It will take me away for a while after I am tired .The guitars and songs will take me to mountains and fields.
Country music usually talks of everyday life and feelings.It’s the spirit of America ,easy to understand ,slow and simple.
Country music developed in the Southern United States.It was the folk music of American countryside.Many of songs tell about the lives of farmers .They talk about love,crops or death.
The life of the countryside can be hard,so the words in country music are often sad.At first,people played the music only at family parties.But it became more popular later. In the 1920s,people played country songs on the radio,and they made them into records.
When people in the countryside moved to towns and cities to look for work,they took their music with them.Country music continued to change and became popular across America.
John Denver was one of America’s most famous country singers in the 1970s.His song “Take Me home,Country Roads”is well-known and people still play it today.
【小题1】Country music is usually about _______.
A.everyday life and feelings | B.farmers’s feelings |
C.the lives of workers | D.the lives of students |
A.in John Denver’s city |
B.in the Southern United States. |
C.in the Northern United States |
D.in the middle of United States |
A.in the 1920s | B.in 1920 | C.in the 1970s | D.in 1970 |
A.Because city people liked the music. |
B.Because farmers moved to cities with their music and it continued to change. |
C.Because country music talked about city people’s lives. |
D.Because country music is very famous |
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