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Recently, several thousand computers in the United States were attacked by a virus. The co

mputers were slowed or shut down. But no information was lost. A computer virus is similar to a biological virus--an organism (生物体) that can harm the human body. A computer virus is a series of electronic commands that can harm a computer or the information in the computer. It infects the device (设备) secretly. It tells the computer to do something the computer's owner does not want it to do. For example, a virus could enter a bank's computer system. It might tell the system to destroy all information about money belonging to everyone with the first name United States several months ago. The virus was created by a university student studying computer science. The computers affected by the virus were in major universities, government agencies (政府机关) and private (私人) companies. They were part of a United commands in a computer at his school. The computer sent the commands to other computers through the linked telephone lines.

The virus told each computer to make many copies of itself. Within a few minutes, all the computers' power was being used to make copies of the virus. The computer could do no other work. It finally slowed down greatly, or simply stopped working. Computer experts spent many days trying to destroy the virus in the computer system.

The experts agree the virus could have been much worse. They say it could have sent orders to destroy huge amounts of electronic information.

Many experts believe, the recent computer virus showed the need for better computer security (安全). But that is a problem. The affected system provides a free exchange (交换) of ideas and information among universities, private companies and government offices. Increasing security too much would destroy this exchange. It would slow progress on many important research projects.

Which of the following statements is true？

A．Many computers were attacked by a virus in the U. S.

B．Many computers attacked by a virus in the U.S. lost their information.

C．A computer virus can harm human body.

D．A computer virus can help the computer owner do many things.

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更多“Recently, several thousand com…”相关的问题
第1题
Recently the newspapers have reported several ______ on the boundaries of Israeland Jordan

Recently the newspapers have reported several ______ on the boundaries of Israel and Jordan.

A．accidents

B．incidents

C．events

D．happenings

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第2题
听力原文：Decreasing circulation has been a problem for newspapers for some years. The Inte

听力原文： Decreasing circulation has been a problem for newspapers for some years. The Internet is just the most recent competitor for people's time.

American media are privately owned. Newspapers get some of their money from renders. But mostly they depend on businesses to buy advertising space in their pages. The larger the circulation, the more a newspaper can charge advertisers. But recently, several newspapers have admitted lying about their number of readers.

The Tribune Company announced that it had overstated sales of two of its papers. These were Newsday and the Spanish-language paper Hoy. The Tribute Company also owns the Los Angeles Times and the Chicago Tribune. In July, the Audit Bureau of Circulations punished Newsday and Hoy. The two newspapers will have to report their circulation numbers more often than usual for the next two years.

Recently the Belo Corporation announced it had overstated the circulation of the Dallas Morning News, in Texas. The publisher will repay 23 million dollars to advertisers. It will also provide four million dollars in free advertising. Other publishers that falsely reported their circulations will also be repaying advertisers trillions of dollars.

An Audit Bureau spokeswoman says eases like these recent ones appear to be ram. But the Securities and Exchange Commission announced that it would expand its investigation to oilier newspapers.

(33)

A．The decreasing circulation of American newspapers.

B．The investigation on American newspapers.

C．The false circulation reports of American newspapers.

D．The punishment on American newspapers.

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第3题
Researchers have recently found a connection between disease and stressful situations. To
test this theory, psychologists are trying to find a link between the brain and the immune system.

The immune system in our bodies fights the bacteria and viruses which cause disease. There- fore, whether or not we are likely to get various diseases depends on how well our immune system works. Biologists used to think that the immune system was a separate, independent part of our bodies. Recently, however, they have found that our brain can affect our immune system. This discovery indicates that there may be a connection between emotional factors, such as stress or depression, and illness.

Although many doctors in the past suspected a connection between emotional factor and disease, they had no proof. Scientists have only recently discovered how the brain and the immune sys- tem function. Before this, no one could see a link between them. As a result, medical science never seriously considered the idea that psychological factors could cause disease.

Several recent studies showed a connection between stress and illness, for example, researchers went to an American military school to study the students. They found that the sick students there had a lot of academic pressure and wanted to achieve, but they were not very good students. In a similar study, researchers studied a group of student nurses and found that the nurses who developed cold sores were the ones who described themselves as generally unhappy people.

In addition to these results, which support their theory, researchers are also looking for proof that stress can damage the immune system. Researchers studied recently bereaved people, i. e. , people whose loved ones have just died, because they are more likely to become ill or die. By examining the immune system of recently bereaved people, the researchers made an important discovery. They examined some white blood cells which are an important part of the immune system. They were not functioning properly. The fact that they were not working correctly indicates that severe psycho- logical stress, such as a loved one's death, may damage an important part of our immune system.

There is still no positive proof of a connection between the immune system and psychological factors. Researchers also say that the results of the studies on bereaved people could have a different explanation. For example, bereaved people often sleep and eat less than normal, or may drink alcohol or take medication. These factors can also affect the immune system. More research is needed to clearly establish the connection between the immune system and psychological factors.

The study on the military school students indicated that ______.

A．life in the school was very stressful

B．disease could be caused by psychological factors

C．the good students were likely to fall ill

D．stress often made students unhappy

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第4题
Halloween （October 31) is a holiday widely celebrated with different names in many co

Halloween (October 31) is a holiday widely celebrated with different names in many countries. (万圣节(10月31日)是一个在很多国家用不同名字广泛庆祝的节日。)Although it originated as a religious holiday, it has lost its religious connections in the United States. It is now celebrated largely as a children's day, and many American children look forward to it for days and weeks beforehand.

The orange pumpkin is harvested at this time of year and is hollowed out, a funny face cut into it, and a candle placed inside as decorations in the window. City folks, nowadays, sometimes use paper pumpkins for decorations. Some years ago, the holiday was celebrated by dressing up in strange and frightening costumes and playing tricks on one's neighbors and friends, such as ringing door bells, throwing bits of corn on the window panes, and in other ways making minor disturbances. More recently, children come to the door to have friends and neighbors admire their costumes and guess who they are behind the false faces and receive treats of candy, fruit or cookies. They say, "Trick or Treat", meaning "I will play a trick on you if you do not give me a treat."

This practice has even more recently developed into a significant international activity. Instead of or along with candy, the children collect money for UNICEF (United Nations International Children's Emergency Fund). This special collection of money by children for needy children throughout the world is known as "UNICEF Trick or Treat". Begun only recently, it results in several million dollars each year contributed to UNICEF. The collection box is orange, reminiscent of the pumpkin.

1.What does Halloween originate from？

A.A children's day.

B.A children's trick.

C.A religious day.

D.A UNICEF day.

2.What is the symbol of Halloween？

A.Pumpkin

B.Candle

C.Costumes

D.Money

3.The holiday was celebrated in the following ways some years ago EXCEPT ______.

A.putting on strange and frightening costumes

B.receiving treats of candy, fruit or cookies

C.playing tricks on one's neighbors and friends

D.ringing door bells

4.Why do children collect money in the Halloween？

A.They love money.

B.They want to get enough money to buy themselves candy.

C.The adults are willing to give them money.

D.They want to help other children.

5.The collection box is dyed orange because ______.

A.children love orange

B.orange stands for happiness

C.orange is the color of pumpkins

D.orange is loved by adults

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第5题
Crying and waking up in the middle of night are routine during any newborns first few mont
hs. But if those crying episodes continue on a regular【C1】______past the first year, then they may signal possible behavioral problems【C2】______. Thats what researchers in Europe found when they【C3】______nearly two dozen studies on something developmental experts call regulatory problems—which include trouble sleeping, continuous crying and difficulty feeding. The researchers【C4】______in the journal Archives of Disease in Childhood that infants who consistently cry and wake up at night past their third month are nearly twice as likely to【C5】______problems such as attention deficit hyperactivity disorder (ADHD), depression, anxiety, aggressive behavior. or【C6】______disorders by the time they begin school. The most【C7】______behavioral difficulties these children had involved【C8】______of self-control, and an inability to calm themselves down or act【C9】______in different social situations. How exactly are【C10】______crying jags and picky eating during infancy【C11】______later behavioral problems？ Dieter Wolke, one of the study co-authors and a professor of developmental psychology at University of Warwick in England, says the data dont support any【C12】______link, but there are several possibilities. One, the crying and waking up at night are simply the first signs of behavioral problems that the babies can not【C13】______themselves very well. Every baby wakes up several times a night and may start crying, but most will eventually learn to calm themselves down and【C14】______back to sleep. They learn that enough is e-nough and inevitably【C15】______that Mom and Dad wont come running every time they cry. If babies are already【C16】______to contracting a behavioral disorder, 【C17】______, they may not be able to learn such self-control, and their crying episodes may continue well past their first year. 【C18】______, says Wolke, some infants may be genetically susceptible to problems regulating their behavior; specifically, scientists have recently identified a version of a【C19】______concerning dopamine function, which governs mood and emotions as well as motor function, that may make some infants more【C20】______to behavioral problems.

【C1】

A．agenda

B．schedule

C．basis

D．interval

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第6题
Human beings need to drink for their survival. Water ranks【61】on the list of all-time safe
fluids. But not all water is as safe as once【62】. Recent tests of water fountains in several U. S. cities show that many fountains give water containing large【63】of lead (铅) , a poisonous metal. A recent study of 900 water fountains in Los Angeles【64】that half of the fountains【65】contained higher amounts of lead than the【66】the experts consider【67】. In other cities【68】results of tests were announced; too much lead in many, though【69】, drinking fountains. Water doesn't normally contain any lead, but when it passes through pipes, it can【70】. People who drink the water【71】the lead. An adult' s body passes most of the lead【72】the body, but children' s【73】retains more than half the lead【74】. This makes children more likely to be affected. Lead can damage the kidneys, cause【75】and impair learning and memory.【76】four million children in U. S. A. already have high levels of lead in their bodies. Most of this lead comes from【77】polluted with the metal. They can【78】it up from eating dirt or paint chips containing lead. In【79】to limit the lead in water fountains, officials recently suggested that fountains【80】to have too much lead be replaced or repaired. And that certainly requires a lot of money.

(61)

A．high

B．highly

C．higher

D．height

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第7题
Recently, one of my best friends Jennie, with whom I have shared just about everything sin
ce the first day of kindergarten, spent the weekend with me. Since I moved to a new town several years ago, we have both always looked forward to the new times a year when we can see each other.

Over the weekend, we spent hours and hours, staying up late into the night, talking about the people she was hanging around with. She started telling me stories about her new boy friend, about how he experimented with drugs and was into other self-destructive behavior. I was blown away! She told me how she had been lying to her parents about where she was going and even stealing out to see this guy because they didn't want her around him. No matter how hard I tried to tell her that she deserved better, she didn't believe me. Her self-respect seemed to have disappeared.

I tried to convince her that she was ruining her future and heading for big trouble. I felt like I was getting nowhere. I just couldn't believe that she really thought it was acceptable to hang with a bunch of losers, especially her boy friend.

By the time she left, I was really worried about her and exhausted by the experience. It had been so frustrating that I had come close to telling her several times during the weekend that maybe we had just grown too far apart to continue our friendship, but I didn't.I put the power of friendship to the ultimate test. We'd been friends for far too long. I had to hope that she valued me enough to know that I was trying to save her from hurting herself. I wanted to believe that our friendship could conquer anything.

A few days later, she called to say that she had thought long and hard about our conversation, and then she told me that she had broken up with her boy friend. I just listened on the other end of the phone with tears of joy running down my face. It was one of the truly rewarding moments in my life. Never had I been so proud of a friend.

What word best sums up Jennie's boy friend？

A．A drug user.

B．A loser.

C．A trouble maker.

D．A criminal.

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第8题
I was a freshman in college when I met the Whites. They were completely different from my
own family. Jane White and I became friends at school, and her family welcomed me like along-lost cousin.

In my family it was always important to place blame when anything bad happened. But the Whites didn't worry about who had done what. Mr. and Mrs. White had six children: three sons and three daughters.

In July, the White sisters and I decided to take a car trip to New York. The two oldest, Sarah and Jane, were college students, and the youngest, Amy had recently got a driver' s license, and was excited about practicing her driving on the trip.

The big sisters let Amy take over. She came to an intersection with a stop sign, but Amy continued without stopping. The driver of a large truck, crashed into our car.

Jane was killed instantly.

When Mr. and Mrs. White arrived at the hospital, they hugged us all.

To both of their daughters, and especially to Amy, over and over they simply said, "We' re so glad that you're alive."

I was astonished. No blame.

Later, I asked the Whites why they never talked about the fact that Amy was driving and had run a stop sign.

Mrs. White said, "Jane's gone, and nothing we say or do will bring her back. But Amy has her whole life ahead of her. How can she lead a full and happy life if she feels we blame her for her sister' s death？"

They were right. Amy graduated from college and got married several years ago, She works as a teacher of learning-disabled students. She' s also a mother of two little girls of her own, the oldest named Jane.

The writer of the article is ______ .

A．Mrs. White's niece

B．the Whites' cousin

C．Sarah' s friend at college

D．Jane' s friend at school

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第9题
The largest shark known to us, Megalodon, is extinct. Or is it？ Carcharodon Megalodon, com
monly known as Megalodon, is believed to have lived between I million and 5 million years ago and thought to have been 52 feet long. It is (or was) a shark that had a jaw 7 or more feet wide. Fairly recently, there has been some speculation about whether it is extinct or just out of reach. But few people believe that Megalodon has found a home deep in the ocean.

There are many known "Living Fossils": Coelacanth, Sea Cucumbers, Sea Urchins, Lobsters, Sea Stars. The common ones like lobsters and sea urchins are not really looked on as anything amazing. They've been around for thousands of years or more, and axe easily accessible to us. What if they weren't accessible and yet still existed？ We would label them extinct. The discovery of a live Coelacanth, a fish long believed extinct, challenged some scientists' long-held beliefs on extinction. There have been recent discoveries Of incredibly large squid, and deep-sea fish never before seen by scientists.

In the 1960s the U.S. Navy set up underwater microphones around the world to track Soviet submarines. The network, known as the Sound Surveillance System, still lies deep below the ocean's surface in a layer of water known as the "deep sound channel'. The temperature and pressure of the channel allow sound waves to travel undisturbed. NOAA's Acoustic Monitoring Project has been using the Sound Surveillance System to listen for changes in ocean structure like ocean currents or volcanic activity. Most of the sounds recorded are common and of no concern. One sound, identified in 1977 by U.S. Navy "spy" sensors, was odd. It was obviously a marine animal but the call was more powerful than any of the calls made by any other reported sea creature. It was too big for a whale. Could it be a deep-sea monster？ One possibility was a giant squid, but no one is sure. It was named "Bloop". Could it be Megalodon？ If Megalodon is still alive down in the bottom of the ocean, we may some day soon discover it. Then what？ Deep sea diving will never be the same, that's for sure!

The following is commonly known EXCEPT ________.

A．Megalodon, the largest shark, is extinct

B．Megalodon is not extinct but just out of reach

C．Megalodon was 52 feet long and had a jaw 7 or more feet wide

D．Megalodnn lived between several million years ago

点击查看答案
第10题
The largest shark known to us, Megalodon, is extinct. Or is it？ Carcharodon Megalodon, com
monly known as Megalodon, is believed to have lived between 1 million and 5 million years ago and thought to have been 52 feet long. It is (or was) a shark that had a jaw 7 or more feet wide. Fairly recently, there has been some speculation about whether it is extinct or just out of reach. But few people believe that Megalodon has found a home deep in the ocean.

There are many known "Living Fossils": Coelacanth, Sea Cucumbers, Sea Urchins, Lobsters, Sea Stars. The common ones like lobsters and sea urchins are not really looked on as anything amazing. They've been around for thousands of years or more, and are easily accessible to us. What if they weren't accessible and yet still existed？ We would label them extinct. The discovery of a live Coelacanth, a fish long believed extinct, challenged some scientists' long-held beliefs on extinction. There have been recent discoveries of incredibly large squid, and deep-sea fish never before seen by scientists.

In the 1960s the U.S. Navy set up underwater microphones around the world to track Soviet submarines. The network, known as the Sound Surveillance System, still lies deep below the ocean's surface in a layer of water known as the "deep sound channel". The temperature and pressure of the channel allow sound waves to travel undisturbed. NOAA's Acoustic Monitoring Project has been using the Sound Surveillance System to listen for changes in ocean structure like ocean currents or volcanic activity. Most of the sounds recorded are common and of no concern. One sound, identified in 1977 by U.S. Navy "spy" sensors, was odd. It was obviously a marine animal but the call was more powerful than any of the calls made by any other reported sea creature. It was too big for a whale. Could it be a deep-sea monster？ One possibility was a giant squid, but no one is sure. It was named "Bloop". Could it be Megalodon？ If Megalodon is still alive down in die bottom of the ocean, we may some day soon discover it. Then what？ Deep sea diving will never be the same, that's for sure!

The following is commonly known EXCEPT ______.

A．Megalodon, the largest shark, is extinct

B．Megalodon is not extinct but just out of reach

C．Megalodon was 52 feet long and had a jaw 7 or more feet wide

D．Megalodon lived between several million years ago

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