For many adolescents, “screen time” is almost a full-time job that could lead to obesity, diabetes and other health issues, a Canadian researcher says.

Adolescents now spend an average of six hours a day in front of some type of screen, whether it’s a television or computer screen or one of the many portable devices now popular with young people, studies done by Dr. Ian Michael Janssen show. “They spend more hours daily in front of a screen than they do in a classroom in a given year,” said Janssen, a researcher at Queen’s University in Kingston, Canada. The result is a rise in obesity rates among adolescents. Unfortunately, fixing the problem isn’t as easy as simply cutting down screen time, Janssen cautions. “Decreasing screen time will not automatically increase physical activity levels,” said Janssen, Some active kids also spend a lot of time in front of television and computer screens, and some kids who have low screen times also have low levels of physical activity, he points out.

As well, screen time is not necessarily bad, Janssen said. “The tricky part is that children today need to be using computers,” he said. Computers are required for schoolwork, and technological skills are important for future job prospects. The quality of screen time matters too, along with the quantity---consider the negative health messages found in food advertising during children’s shows, he said. Ideally, children should aim for no more than two hours of recreational screen time a day.

Janssen’s real worry about the rise in childhood obesity rates is not that there are now rare cases of type 2 diabetes in kids, where once there were none, hut the health problems these children are likely to face in the future as adults, including high blood pressure, high cholesterol and cardiovascular disease.

1.Which one doesn’t belong to “screen time” according to the passage?

A. Watching TV. B. Surfing the Internet.

C. Seeing a film on an MP4. D. Making a telephone call.

2.In Janssen’s opinion, kids had better to keep healthy.

A. lose weight. B. decrease screen time

C. take physical activities D. go on a diet

3.What’s the researcher’s attitude towards “screen time of adolescents" ?

A. Concerned. B. Passive.

C. Positive. D. Frightened.

4.We can learn from the passage that .

A. many of the people having full-time jobs suffer from obesity and diabetes.[

B. decreasing screen time can’t really solve the problem

C. children today most use computers to finish their school work

D. a new type of obesity in kids becomes Janssen’s real worry

練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語 來源：河南省安陽市2016-2017學(xué)年高一下學(xué)期期中考試英語試卷 題型：短文填空

Wang Peng sat in his empty restaurant 1. (feel) frustrated because no customers had come to his restaurant ever since he got up early in the morning. What was the matter? His restaurant should be full of people 2. (usual) by now. He thought something terrible 3. have happened and he wanted to find out why. He hurried out and 4. (follow) Li Chang, 5. was one of his regular customers, into a newly-opened restaurant. He was surprised 6. (find) that the owner named Yong Hui was serving slimming foods to make people thin. 7. (curious) drove Wang Peng inside to take a close look at the menu. He was 8. (amaze) at what he saw. He couldn’t have Yong Hui getting away 9. telling people lies, so he went to the library to do some research. After a lot of reading, he realized that Yong Hui’s food would make people become tired quickly 10. it had far too little fat. Arriving home, Wang Peng made a new sign. The competition between the two restaurants was on!

查看答案和解析>>

科目：高中英語 來源：云南省2017屆高考適應(yīng)性月考（八）英語試卷（有答案） 題型：閱讀理解

Before leaving his job in Brooklyn, Brian Peter had one thing he wanted to do on his last day-say thank you to the city he loves. Peter decided to use the money he made for a day’s work, as well as the $10 per year he earned for his service, to give back to his community.

“I've got nothing but good things from the city and the citizens,” Peter said. “I take what I make in a day and add that $120 that the police association was going to give me, and I’ll just add it up to $500 and get some gift cards for people.”

So after fourteen years’ serving as a police officer, Peter spent his last day doing that. Using his own money, Peter purchased five gift cards from Target and five gift cards from the grocery chain Cub Foods worth $ 50 each and handed them out to strangers in Brooklyn Center.

It took him about two hours to give away the cards and that he could put smiles on a lot of people’s faces, including one woman he stopped after noticing the condition of her car. “Her car was really old and really damaged. I saw her windshield wipers were stuck in the up position,” Peter recalled. “I explained what I was doing and gave her a gift card, and immediately, she lit up with a smile.”

Once people overcame the initial shock of what he was doing, Peter said he received a lot more hugs that day. Monique Drier, who stayed with Peter, said Peter has always wanted to give back and didn’t really want the attention. “He didn’t even have a going-away party,” Drier said.

Peter, who started his new job three days ago, said he still wanted to continue giving back to the community. “Community service is extremely important, and when you’re fortunate in life, you should give back to others who aren’t as fortunate as you,” Peter said. “That’s what makes the world go round.”

1.We can learn from the passage that Peter______.

A. decided to retire from his position as a police officer

B. was interested in making friends with some strangers

C. showed his kindness to strangers before leaving his job

D. earned ten dollars a year for his service as a police officer

2.The woman in a car is mentioned in the passage in order to show____.

A. how Peter’s gift card influenced her attitude

B. how Peter added happiness into others’ daily life

C. how Peter found others in trouble and helped them

D. how Peter received hugs from those who were grateful

3.How does Peter think the world can go round according to the passage?

A. By involving other in community service.

B. By sharing what we have with the unfortunate.

C. By giving rewards to those who help others.

D. By offering new jobs to unfortunate people.

4.What is the main idea of this passage?

A. A police officer knew how to cheer up people in trouble.

B. Peter spent his last day giving gift cards to strangers.

C. The best way to help a community can be learnt from Peter.

D. Peter returned what he earned in his work to the police station.

查看答案和解析>>

科目：高中英語 來源：重慶一中2016-2017學(xué)年高二下學(xué)期期中考試試卷 英語 Word版含答案 題型：完形填空

Many years ago, my father suffered from a serious heart condition. He was put on _______ disability and was unable to work at a steady job.

However, he wanted to do something to keep himself ______, so he decided to volunteer at the local children ______. My dad loved kids. It was the ______ job for him. He would talk to them and play with them. Sometimes, he would ______ one of these kids. In certain instance, he would tell the sad parents that he would soon be able to ______ their children in heaven and that he would take care of them until they got there. His assurance seemed to help those parents with their ______.

One of these kids was a girl who had been admitted with a rare disease that paralyzed (癱瘓) her from the neck down. She could do ______ and she was very ______. My dad decided to help her. He started ______ her in her room, bringing paints, brushes and paper. He stood the paper up ______ a backing, put the paintbrush in his mouth and began to paint. He didn’t use his ______ at all. All the while he would tell her: See, you can do ______ you set your mind to.

____, she began to paint using her ______, and she and my dad became friends. Soon after, the little girl was discharged (出院) and my dad also left the hospital because he became ______. Sometime later after my dad had ______ and returned to work, he was at the volunteer counter of the hospital one day. He noticed the front door open. In came the little girl who had been paralyzed; only this time she was walking. On seeing my dad, she ______ straight over to him and gave him a ______ she had done using her hands. At the bottom it read: thank you for helping me walk.

My dad would say sometimes love is more powerful than ______, and my dad, who died just a few months after the little girl gave him the picture loved every single child in that hospital.

1.A. permanent B. temporary C. mild D. slight

2.A. confident B. comfortable C. wealthy D. occupied

3.A. center B. hospital C. park D. camp

4.A. normal B. perfect C. awkward D. tiring

5.A. protect B. teach C. lose D. miss

6.A. bury B. praise C. spot D. accompany

7.A. sadness B. happiness C. nervousness D. forgiveness

8.A. anything B. nothing C. Everything D. something

9.A. disappointed B. bored C. depressed D. embarrassed

10.A. visiting B. observing C. avoiding D. contacting

11.A. on B. in C. over D. against

12.A. eyes B. neck C. hands D. head

13.A. whoever B. whatever C. wherever D. whenever

14.A. Gradually B. Briefly C. Suddenly D. Naturally

15.A. hands B. feet C. fingers D. mouth

16.A. better B. worse C. healthier D. fitter

17.A. took out B. turned away C. picked up D. knocked over

18.A. ran B. wheeled C. slid D. turned

19.A. card B. picture C. note D. photo

20.A. words B. exercise C. faith D. medicine

查看答案和解析>>

科目：高中英語 來源：四川省2017屆高三5月月考英語試卷 題型：短文改錯(cuò)

假定英語課上老師要求同桌之間交換修改作文，請(qǐng)你修改你同桌寫的以下作文。文中共有10處語言錯(cuò)誤，每句中最多有兩處。每處錯(cuò)誤僅涉及一個(gè)單詞的增加、刪除或修改。

增加：在缺詞處加一個(gè)漏字符號(hào)(∧)，并在其下面寫出該加的詞。

刪除：把多余的詞用斜線(\)劃掉。

修改：在錯(cuò)的詞下畫一橫線，并在該詞下面寫出修改后的詞。

注意：1.每處錯(cuò)誤及其修改均僅限一詞；

2．只允許修改10處，多者(從第11處起)不計(jì)分。

The Dragon Boat Festival has a history of over 2,000 years. There are many tales about their origin. The most popular is that the festival is celebrated in honor of Qu Yuan. Qu Yuan was more concerned about his country but was not understanding by the rulers. Feeling desperately, he jumped into the Miluo River on the 5th day of the 5th lunar month, 278 BC. Before he died, the fishermen sailed their boats to look up for his body. People throw zongzi into the water, hoping to keep fish attacking his body. That’s because people later celebrate the festival through such activity as dragon boat racing and eating zongzi on that special day.

查看答案和解析>>

科目：高中英語 來源：寧夏2014-2015學(xué)年高一下學(xué)期第三次月考英語試卷 題型：完成句子

1.每年，美國有800次龍卷風(fēng)，造成80人死亡，1500人受傷。

There are 800 tornadoes in the USA each year,_________about 80_______and 1500_________.

2.我突然想到要出國留學(xué)。

___________ __________ ___________ __________that I will study aboard.

3.人們一致認(rèn)為毛主席是有史以來最偉大的人。

It is generally agreed that chairman Mao is the greatest man_______ _______ ________.

4.埋頭看書，他沒有注意到媽媽進(jìn)來了。

______ ________ his book, He didn’t notice his mother came in..

5.到龍卷風(fēng)結(jié)束為止，700多人遇難。

By the time the tornado ended , more than 700 people ______ ______ ________ .

6.總計(jì)，有83萬人失去生命。

_________ ___________, 830,000 people ___________ _________ __________.

7.隨著社會(huì)的發(fā)展，人們的收入越來越高了。

With the ________of society , the ____ of people is becoming higher and higher.

8.盡管我自己也需要錢，但我愿意幫助你。

Though I need money for myself ,I ____________ _________ ____________help you.

9.他最終成為這家公司的老板。

He_________ ________ __________ the head of the company.

10.高速公路上擠滿了車。

The freeway ________ __________cars.

查看答案和解析>>

科目：高中英語 來源：寧夏2014-2015學(xué)年高一下學(xué)期第三次月考英語試卷 題型：閱讀理解

Long, long ago there were a lot of donkeys. The donkeys worked hard every day. They had no time to play or to relax, but they never felt appreciated (得到賞識(shí)的) for the work they did.

One day two donkeys got bored. They wanted to live a comfortable life, so the donkeys went to see a wise old man. They told him their problem. The wise old man agreed they worked too hard, and he wanted to help the donkeys. “I have an idea,” he said.

“What is your idea?” asked the donkeys.

“I will paint you and no one will know you are donkeys,” said the man.

The man went off to find some paint and he returned in just a matter of minutes. He had two pots of paints. One pot was filled with white paint, and the other black paint.

The old man first painted them white, and then painted stripes(斑紋 ) over the white paint. When he finished, the donkeys did not look like donkeys at all. “You no longer look like donkeys,” the old man said. “Everyone will be fooled (欺騙). I will call you something else, zebras( 斑馬).”

The zebras went to a field to eat grass. Now they did not have to work.

Soon, other donkeys saw the zebras. They asked the zebras where they came from. When the zebras told the donkeys their secret, the donkeys all rushed to see the old man.

“Please make us into zebras, too,” they pleaded. So the wise old man painted more donkeys. As he did, more and more donkeys came.

The old man could not paint fast enough. Soon the donkeys became impatient（不耐煩的）. They began to kick about, and they knocked over the paint pots.

There was no more paint. The painted donkeys ran off to become zebras. The unpainted donkeys, because of their impatience, had to return to work.

1.The two donkeys went to see a wise old man in order to _____.

A. become patient B. ask him for help

C. change into zebras D. have a rest

2.What does the underlined word “pleaded” (in Paragraph9) mean?

A. relaxed B. knocked

C. agreed D. begged

3.What finally happened to the impatient donkeys?

A. They looked for another wise man to paint them

B. They were still donkeys working hard all the time.

C. They won praise for the work they did.

D. They hated the zebras and fought with them

4.What can we infer from the passage?

A. Being patient is very important

B. Both donkeys and zebras had to work hard

C. The wise old man was killed by these impatient donkeys.

D. There is always a good way not to work hard

查看答案和解析>>

科目：高中英語 來源：2017年全國普通高等學(xué)校招生統(tǒng)一考試英語（浙江卷正式版） 題型：七選五

根據(jù)短文內(nèi)容，從短文后的選項(xiàng)中選出能填入空白處的最佳選項(xiàng)。選項(xiàng)中有兩項(xiàng)為多余選項(xiàng)。

How to Do Man-on-the-Street Interviews

The man-on-the-street interview is an interview in which a reporter hits the streets with a cameraman to interview people on the sport. _____ But with these tips, your first man-on-the-street interview experience can be easy.

? When your boss or professor sends you out to do man-on-the-street interviews for a story, think about the topic and develop a list of about ten general questions relating to it. For example, if your topic is about environmental problems in America, you might ask, “Why do you think environmental protection is important in America?” _____

? Hit the streets with confidence. _____ Say, “Excuse me, I work for XYZ News, and I was wondering if you could share your opinion about this topic.” This is a quick way to get people to warm up to you.

Move on to the next person if someone tells you she is not inter

Don’t get discouraged.

● Each interview that you get on the street shouldn’t be longer than ten minutes. As soon as you get the answer you need, move on to the next person. Make sure that as you go from interview to interview, you are getting a variety of answers. If everyone is giving you the same answer, you won’t be able to use it. A safe number of interviews to conduct is about six to ten.

● If your news station or school requires interviewees to sign release forms to appear on the air, don’t leave work without them.

A. Limit your time.

B. As you approach people, be polite.

C. If you don’t own a camera, you can buy one.

D. For new reporters, this can seem like a challenging task.

E. To get good and useful results, ask them the same question.

F. That number of interviews should give you all the answers you need.

G. With a question like this, you will get more than a “Yes” or “No” reply.

查看答案和解析>>

科目：高中英語 來源：2017年全國普通高等學(xué)校招生統(tǒng)一考試英語（北京卷正式版） 題型：單項(xiàng)填空

People ______ better access to health care than they used to, and they’re living longer as a result.

A. will haveB. haveC. hadD. had had

查看答案和解析>>

同步練習(xí)冊(cè)答案