题目内容

Computer ______ useful in ______ life.

[　　]

A．proves...everyday　　　B．show...everyday

C．tests...every day　　　D．believes...every day

答案：A
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On October 12, 1989, some Chinese scientists were working at the computers to look for information they needed. Suddenly they saw a lot of very bright spots crossing the computers’s 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 ! Obviously 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（耶路撒冷）Viruses. These viruses can stay in computers for a long time. When the time comes they will attack 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 Fridays and that they are spreading to a lot of computers. Among the countries that suffered computer viruses last year are Britain, Australia, Switzerland and the U.S. But fill now , how to get rid of the terrible viruses remains a problem.

1.The group of young men created the virus to________.

A．damage the computers

B．test their ability

C．tell the world that they were intelligent

D．play a trick on operators of the computers

2.According to the passage, computer viruses seem to________.

A．have been in nature for years

B．exist in any computers

C．be difficult to get rid of at present

D．be able to be got rid of in the near future

3.The most serious damage caused by the viruses is that________.

A．the computer’s functions are lowered

B．the normal programs are damaged

C．all the information stored in the computers is gone

D．the computers infected by the viruses can no longer be used

 

Internet has become part of young people’s life. You can do lots of things on line such as chatting, sending messages and emails, getting useful knowledge and information, buying things without going to the shops, visiting cool websites, and so on. But it’s also easy to be cheated online. Here’s a story about a girl named Mary.

Mary is an 18-year-old girl who lives in New York. The people in Mary’s family are so busy that they hardly have time to be with her. In fact, Mary is quite lonely. So she spends a lot of time on QQ.

Last year Mary made a very special friend on QQ. His name was David and he lived in San Francisco. David was full of stories and jokes. He and Mary had a common interest in rock music and modern dance. So it always took them hours to talk happily on QQ and sometimes they even forgot the time. David sent Mary a picture of “himself”: he was a tall, good-looking young man with a big, happy smile. As time went by, they became good friends and often sent cards and small things to each other.

Before David’s birthday, Mary wanted to give him a surprise. She flew to San Francisco. But when Mary knocked on David’s door, she found that the special friend was a twelve-year-old boy named Jim!

So when you make friends on the Internet, please be careful. Here are some rules to make sure you are safe and have fun on the Internet.

u    Don’t give your password to anyone else, and never let out the following information: your real name, home address, age, school, phone number or other personal information.

u    Never agree to meet someone you met on the Internet without your parents’ permission. Never meet anyone you met online alone.

u    Always remember that people online may not be who they say they are. Treat everyone online as if they were strangers.

u    Remember — not everything you read on the Internet is true.

1.Why does Mary spend a lot of her time on QQ?

A．Because she feels lonely.

B．Because she doesn’t like learning.

C．Because she wants to make a boyfriend.

D．Because she likes computer games.

2.Mary thought David was special because __________.

A．he was tall and good-looking               B．he sent her a picture of himself

C．he was from San Francisco                D．he made her quite happy on QQ.

3.It’s good for children to _________ on the Internet.

A．give password to others

B．get useful knowledge and information

C．give phone number to others

D．believe everything they read

4.What shouldn’t be done when you are online according to the passage?

A．Sending messages and emails.

B．Visiting cool websites.

C．Giving your real name to others.

D．Treating everyone online as strangers.

5.What’s the main idea of this passage?

A．Things might not be real on the Internet.

B．It’s not good to chat on QQ.

C．Don’t meet some one you get to know on QQ.

D．Don’t buy anything on line.

 

The invention of the electric telegraph gave birth to the communications industry.Although Samuel B．Morse succeeded in making the invention useful in 1837，it was not until 1843 that the first important telegraph line was constructed.By 1860 more than 50,000 miles of lines connected people east of the Rockies.The following year，San Francisco was added to the network.

The national telegraph network strengthened the ties between East and West and contributed to the rapid expansion of the railroads by providing an efficient means to monitor schedules and routes.Furthermore，the extension of the telegraph，combined with the invention of the steam－driven rotary printing press by Richard

M．Hoe in 1846，revolutionized the world of journalism.Where the business of news gathering had been dependent upon the mail and on hand－operated presses，the telegraph expanded the amount of information a newspaper could supply and allowed for more timely reporting.The creating of the Associated Press as a central wire service in 1846 marked the arrival of a new era (纪元) in journalism.

1.The main topic of the passage is ________.

A．the history of journalism

B．the origin of the national telegraph

C．how the telegraph network contributed to the expansion of railroads

D．the contributions and development of the telegraph network

2.This passage would most likely be found in a________.

A．U.S. history book                        B．book on trains

C．science textbook                        D．computer magazine

3.It can be inferred from the passage that ________.

A．Samuel Morse did not make a significant contribution to the communications industry

B．Morse’s invention did not immediately achieve its full potential (潜力)

C．the extension of the telegraph was more important than its invention

D．journalists have the Associated Press to thank for the birth of the communications industry

 

It's 10:30 pm, and 11-year-old Brandon Blanco is sound asleep at home. Suddenly, a loud noise wakes him up. Naturally, Brandon reaches for his cell phone. The message becomes clear: "R U awake?"

Brandon' s use of technology doesn' t stop there. He also has a computer, a TV and three video-game consoles (控制台 ) in his room. With so many choices, it' s no surprise that when he isn' t at school, he spends nearly every waking minute using one or more of these devices

Brandon is hardly alone. According to a recent study by the Kaiser Family Foundation, kids aged 8 to18 are spending more time than ever before using electronic devices. How much time? More than seven and a half hours a day on average, the study found.

The jump is the result of a huge explosion in mobile devices, says Victoria Rideout, the lead author of the study. Today, nearly seven out of ten kids have cell phones. Just five years ago, it was four out of ten.

Often, kids multitask, or use more than one device at a time. " If you’ve got a chance to do something on your computer and take a phone call and have the TV on in the background, why not?" media expert Cheryl Olson says.

Most experts agree technology has much to offer kids. But some worry the kids could be missing out on other activities like playing outside or hanging out with friends. " It' s a matter of balance," says Olson." You’ve got to work on it. "

Multitasking while doing homework is another concern. Some kids listen to music, watch TV or use the phone while doing their homework. "It' s important to make sure that you can stop and concentrate on one thing deeply, " says Rideout.

With new and exciting devices hitting stores every year, keeping technology use in check is more important than ever. " Kids should try," adds Rideout. " But parents might have to step in sometimes. "

1.Why do children spend more time in using electronic devices?

A．Because more electronic devices are available to them.

B．Because electronic devices are more exciting than before.

C．Because they have less other activities.

D．Because they have less homework to do.

2.It is known from the passage that  ____.

A．Brandon Blanco feels very annoyed about his late-night text

B．the teenagers using mobile devices have increased by 30% in the past five years

C．Cheryl Olson is not surprised about kids' increasing use of mobile devices

D．most experts think teenagers should not use electronic devices for their studies

3.Which of the following is an example of multitasking according to the passage?

A．Watching TV while using the computer.

B．Talking on the phone while staying with others.

C．Playing video games on the Internet.

D．Listening to music while relaxing.

4.According to the passage, Victoria Rideout would probably agree that ____.

A．kids should do homework while surfing the Internet

B．kids should do homework in a place without disturbance

C．kids should spend more time on homework

D．kids should have more homework than before

 

LONDON----Here’s a new warning from health experts: Sitting is deadly.

     Scientists are increasingly warning that sitting for prolonged periods — even if you also exercise regularly — could be bad for your health. And it doesn’t matter where the sitting takes place — at the office, at school, in the car or before a computer or TV — just the overall number of hours it occurs. Several studies suggest people who spend most of their days sitting are more likely to be fat, have a heart attack or even die.

　　In an editorial published this week in the British Journal of Sports Medicine, Elin EkblomBak of the Swedish School of Sport and Health Sciences suggested that authorities rethink how they define physical activity to highlight the dangers of sitting.

　　While health officials have issued guidelines recommending minimum amounts of physical activity, they haven’t suggested people try to limit how much time they spend in a seated position.

　　"After four hours of sitting, the body starts to send harmful signals," Ekblom-Bak said. She explained that genes regulating(调节) the amount of glucose（葡萄糖） and fat in the body start to shut down.

　　Even for people who exercise, spending long periods of time sitting at a desk is still harmful. Tim Armstrong, a physical activity expert at the World Health Organization, said people who exercise every day — but still spend a lot of time sitting — might get more benefit if that exercise were spread across the day, rather than in a single bout.（一回）

　　Still, in a study published last year that tracked more than 17,000 Canadians for about a dozen years, researchers found people who sat more had a higher death risk, independently of whether or not they exercised.

　　"We don’t have enough evidence yet to say how much sitting is bad," said Peter Katzmarzyk of the Pennington Biomedical Research Center in Baton Rouge, who led the Canadian study. "But it seems the more you can get up and interrupt this sedentary behavior, the better."

　　Figures from a U.S. survey in 2003-2004 found Americans spend more than half their time sitting, from working at their desks to sitting in cars.

　　Experts said more research is needed to figure out just how much sitting is dangerous, and what might be possible to offset those effects.

　　"People should keep exercising because that has a lot of benefits," Ekblom-Bak said. "But when they’re in the office, they should try to interrupt sitting as often as possible," she said.

1.What is the best title for the text?

A. Not Sitting Too Much While Working      B. How To Avoid Sitting Too Much

C. Sitting Too Much Could Be Deadly          D. More And More People Sit Too Much

2.According to the research,______________.

A. the more time you spend in exercising in a single bout, the healthier you will be.

B. those who often sit too much are sure to grow fat or suffer from a heart attack.

C. regular exercise is effective to get rid of the side effect of sitting too much.

D. you had better not sit for more than four hours in a single bout.

3.How does the danger of sitting too much affect the human body?

A. It results in a higher death risk.

B. It increases glucose and fat in the body.

C. It makes a person unable to exercise long enough in a day.

D. It causes the gene to fail to balance the glucose and fat in the body.

4.In the opinion of Ekblom-Bak, you’d better have a rest in the office by________.

A. sending your friends e-mails           

B. having a walk around your office

C. chatting online or playing computer games 

D. listening to music with your head on the desk.

 

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