Recent research from the Pew Internet Project suggests that 90% of Americans aged from 12 to 17 use the Inter...

题型：阅读选择题类：模拟题难易度：普通

Recent research from the Pew Internet Project suggests that 90% of Americans aged from 12 to 17 use the Internet, and 51% of those teens use social networks. However, there are many possible problems with social networking sites and the teenagers who use them.

Apart from the social advantages, social networking sites can be used to record school research, develop artistic talents and experiment with other forms of subject creation. They provide a way to communicate with others who share the same interests and to get helpful advice on ongoing projects.
Along with these advantages come some dangers. For example, most social networking sites are open to all, especially MySpace, which is the most popular social network among teens in America. It means that they could be put in unpleasant and frightening situations.
A greater danger is that teens may become objects of the people with secret purposes. The secrecy of some social networking sites makes it easy for dangerous people to find young teens and invite them into dangerous conversations. It's easy for them to pretend as teens and draw children into dangerous real-world communication as well. Then further hurt might be on its way.
Another danger is identity stealing, which can happen when teens share too much information about their names, dates of birth and locations.
Therefore, it's very important to make sure teens are safe when they use social networks.
Many of the same rules that work for online chat work for these sites:
※Don't use your real name.
※ Don't give out personal information to people you don't know. A last name and a town are enough for a bad guy to find where you are.
※ Don't believe that people are who they say to be.
※ Immediately end any communication that makes you uncomfortable and report it to a parent.
Only if you are sure of your safety, can you enjoy the fun brought by social networking. Besides, trying to deal with all problems on your own can lead to terrible results. Remember, asking your parents or school officials for help doesn't mean you are unable to do anything but wiser than many others.

（1）、How many dangers of using social networks are mentioned in the passage?

A、2 B、3 C、4 D、5

（2）、The writer takes MySpace as an example to show that ________.

A、students could be put into unreal situations on the Internet B、teenagers are facing unknown dangers on the social networks C、Internet provides more social websites to American teenagers D、social networks are very popular among teenagers in America

（3）、We can infer from the passage that ________.

A、the dangers are similar when chatting online and surfing social networks B、more than half American teenagers aged from 12 to 17 use social networks C、teens who ask for help are wiser when meeting problems on social networks D、there are more disadvantages than advantages for teens to use social networks

举一反三

    The giant panda is one of the most popular animals in the world. A giant panda can grow up to 1.5 meters long and weigh up to 160kg. People think the giant panda is very lovely. ①So it is not surprising that the World Wide Fund for Nature chose the giant panda as its symbol. The WWF tells people about animals that they are in danger and raises money to save them.
    The giant panda only lives in the wild in China. In the early 1980s, were only 1,000 left in the wild. The main reason why pandas are endangered is that the area where pandas can live has become smaller.
    The WWF works to help giant pandas in the wild in many ways. One of the ways that helps them is to increase the size of panda reserves(自然保护区). Some reserves need to be joined together by planting bamboo between them to make “corridors”. These are paths that lead from one reserve to another. No one may harm the pandas in these areas. The corridors let pandas move from one habitat (栖息地) to another to look for food. ②People are working very hard to make sure the giant panda does not die out.

    In most parts of the world, many students help their school make less pollution. They join in “environment(环境) clubs”. In an environment club, people work together to make our environment clean.
    Here are the things students often do.
    Turn off the water! Do you know that some toilets can waste(浪费) twenty to forty tons of water an hour?
    In a year, that would fill a small river! In environment clubs, students mend those broken toilets.
    No-car day. On a no-car day, nobody comes to school in a car—not the students and not the teachers! Cars give pollution to our air, so remember:
    Walk, jump, bike or run.
    Use your legs! It's lots of fun!
    No-garbage(垃圾) lunches. How much do you throw away after lunch? Environment clubs ask students to bring their lunches in bags that can be used again. Every week they will choose the classes that make the least garbage and report them to the whole school!
   We love our environment. Let's work together to make it clean!

    The computers changed our lives in the 1980s, the Internet changed our lives in the 1990s, and the robots will change our lives in the new century.
    Do you think there will be robots in people's homes? It's not a dream that every home will have a robot.
Now, robots are not only able to help people do the housework, they can also help the doctors do the difficult operations, play chess with people, play the piano and so on.
    A new cooking robot is used in Beijing. It can cook all the dishes on the menu, you only need to wait two to four minutes, in the future, the robot will be a nurse, a security guard, or a partner in your life.
    Experts(专家) believe robots will be used everywhere from the industrial( 工业的) robots to service robots. In the future, robots will become part of the family, and provide else service for people. We all look forward to the new robot age.

阅读理解

Do you know why different animals or pests (昆虫) have their special colors? Colors in them seem to be used mainly to protect themselves.

Some birds like eating locusts (蝗虫), but birds cannot easily catch them. Why? It is because locusts change their colors together with the change of the colors of crops(庄稼). When crops are green, locusts look green. But as the harvest time comes, locusts change to the same brown color as crops have. Some other pests with different colors from plants are easily found and eaten by others. So they have to hide themselves for lives and appear only at night.

If you study the animal life, you'll find the main use of coloring is to protect themselves. Bears, lions and other animals move quietly through forests. They cannot be easily seen by hunters (猎人). This is because they have the colors much like the trees.

Have you ever noticed an even stranger act? A kind of fish in the sea can send out a kind of very black liquid (液体)when it faces danger. While the liquid spreads over (散开), its enemies (敌人)cannot find it. And it immediately swims away. So it has lived up to now though it is not strong at all.

阅读理解

You and I can tell one face from another easily, but can computers do the same with few mistakes? At an earlier time, many thought it was impossible, but progress in facial recognition(识别)software has made it come true. Technology is quickly catching up with the human ability to read faces.

Some facial recognition systems use a digital picture and measure(测量) different points on the face. Measurements include the distance between the eyes, the width of the nose, the length of the jaw(下巴) line and more. A detailed map, or faceprint, of the face is developed, stored and later used as a basis for comparison and matching.

Some government agencies, airports and banks use facial recognition technology for safety purposes. Apple and Facebook use it to provide their users with added convenience. For example, Apple's new iPhone is expected to use it to unlock the home screen. Other companies use it to help them in better recognizing their customers' needs. For example, some stores are checking into the use of the technology to catch sight of return customers. Then they can offer special deals, based on the customers' buying habits.

In America, facial recognition is used by universities to check students' attendance. This year Welsh police used it to catch a terrorist outside a football game. In China it checks on the identities of ride-hailing drivers, permits tourists to enter some places of interest quickly and lets people pay for things with a smile.

While some systems are used with the knowledge of the persons, others aren't, and that raises worries. For many people, however, convenience outbalances the worries, in other words, meaning that facial recognition technology is likely here to stay.

阅读短文，回答问题

A few days ago, the British polar explorer and environmentalist (极地探险家及环境学家) Robert Swan visited our school and we asked him to give a talk on his trips. He was the first person walking to both the North and South Poles and he did something really amazing by reaching the South Pole only on renewable energy (可再生能源) .

Swan's stories of his trips really impressed me. It was more than 30 years ago when he first went to the South Pole. There was nothing they could use to talk to people outside there and the nearest person to him and his teammates was 2, 500 kilometers away. So they had to face all the problems by themselves. He also told us that when taking a shower during the trip, you had to take off all your clothes in the temperature of -30℃ and finished the shower as fast as you could.

In 2017, Swan set foot on the South Pole again, this time with his son. The trip was highly great, not only because Swan was already 61 years old, but also because it was the world's first trip to Antarctica (南极洲) to be made only using renewable energy.

Also, he talked about the importance of saving energy and taking good care of our planet (星球). After his talk, I was sure what I should do and the hope for the wonderful future washed over me.

相关试卷

公司介绍

服务介绍

帮助中心