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LONDON—Here’s a new warning from health experts:Sitting is deadly.
Scientists are increasingly warning that sitting for long 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,”said EkblomBak.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 was spread across the day,rather than in a single bout(一回).
Still,in a study published in 2009 that tracked more than 17,000 Canadians for about a dozen years,researchers found people who sat more had a higher death risk,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 20032004 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,” EkblomBak said.“But when they’re in the office,they should try to interrupt sitting as often as possible,” she said.
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

According to the research,________.

A.the more time you spend in exercising in a single bout(一回),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 effects of sitting too much
D.you had better not sit for more than four hours in a single bout

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.

The underlined word “offset” in Paragraph 10 most probably means “________”.

A.improve B.avoid
C.ignore D.achieve
科目 英语   题型 阅读理解   难度 中等
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相关试题

【2015·安徽】C
As Internet users become more dependent on the Internet to store information, are people remember less? If you know your computer will save information, why store it in your own personal memory, your brain? Experts are wondering if the Internet is changing what we remember and how.
In a recent study, Professor Betsy Sparrow conducted some experiments. She and her research team wanted to know the Internet is changing memory. In the first experiment, they gave people 40 unimportant facts to type into a computer. The first group of people understood thatthe computer would save the information. The second group understood that the computer would not save it. Later, the second group remembered the information better. People in the first group knew they could find the information again, so they did not try to remember it.
In another experiment, the researchers gave people facts to remember, and told them where to find the information on the Internet. The information was in a specific computer folder (文件夹). Surprisingly, people later remember the folder location (位置) better than the facts. When people use the Internet, they do not remember the information. Rather, they remember how to find it. This is called "transactive memory (交互记忆)".
According to Sparrow, we are not becoming people with poor memories as a result of the Internet. Instead, computer users are developing stronger transactive memories; that is, people are learning how to organize huge quantities of information so that they are able to access it at a later date. This doesn't mean we are becoming either more or less intelligent, but there is no doubt that the way we use memory is changing.
The passage begins with two questions to ______.

A.introduce the main topic.
B.show the author's altitude.
C.describe how to use the Interne.
D.explain how to store information.

What can we learn about the first experiment?

A.Sparrow's team typed the information into a computer.
B.The two groups remembered the information equally well.
C.The first group did not try to remember the formation.
D.The second group did not understand the information.

In transactive memory, people ______.

A.keep the information in mind
B.change the quantity of information
C.organize information like a computer
D.remember how to find the information

What is the effect of the Internet according to Sparrow's research?

A.Weare using memory differently.
B.We arebecoming more intelligent.
C.We have poorer memories than before.
D.We need a better way to access information.

【2015·重庆】E
The values of artistic works, according to cultural relativism(相对主义), are simply reflections of local social and economic conditions. Such a view, however, fails to explain the ability of some works of art to excite the human mind across cultures and through centuries.
History has witnessed the endless productions of Shakespearean plays in every major language of the world. It is never rare to find that Mozart packs Japanese concert halls, as Japanese painter Hiroshige does Paris galleries, Unique works of this kind are different from today’s popular art, even if they began as works of popular art. They have set themselves apart in their timeless appeal and will probably be enjoyed for centuries into the future.
In a 1757 essay, the philosopher David Hume argued that because“the general principles of taste are uniform(不变的) in human nature,”the value of some works of art might be essentially permanent. He observed that Homer was still admired after two thousand years. Works of this type, he believed, spoke to deep and unvarying features of human nature and could continue to exist over centuries.
Now researchers are applying scientific methods to the study of the universality of art. For example, evolutionary psychology is being used by literary scholars to explain the long-lasting themes and plot devices in fiction. The structures of musical pieces are now open to experimental analysis as never before. Research findings seem to indicate that the creation by a great artist is as permanent an achievement as the discovery by a great scientist.
According to the passage, what do we know about cultural relativism?

A.It introduces different cultural values.
B.It explains the history of artistic works.
C.It relates artistic values to local conditions.
D.It excites the human mind throughout the world.

In Paragraph 2, the artists are mentioned in order to show that _____.

A.great works of art can go beyond national boundaries
B.history gives art works special appeal to set them apart
C.popular arts are hardly distinguishable from great arts
D.great artists are skilled at combining various cultures

According to Hume, some works of art can exist for centuries because_____.

A.they are results of scientific study
B.they establish some general principles of art
C.they are created by the world’s greatest artists
D.they appeal to unchanging features of human nature

Which of the following can best serve as the title of the passage?

A.Are Artistic Values Universal?
B.Are Popular Arts Permanent?
C.Is Human Nature Uniform?
D.Is Cultural Relativism Scientific?

【2015·重庆】C



LakeLander ·2 hours ago
Today, a man talked very loud on his phone on a train between Malvern and Reading, making many passengers upset. I wonder how he would react if I were to read my newspaperoutloudonthetrain, Ihave never had the courage to do it, though.

Pak50·57 minutes ago
Why not give it a try? Perhaps you should take lessons on a musical instrument. The late musician Dennis Brian is said to have asked a fellow train passenger to turn off his radio. When his request was refused, he took out his French horn(号) and started to practice.

Angie O’Edema ·42 minutes ago
I don’t see how musical instruments can help improve manners in public. Don’t do to others what you wouldn’t like to be done to yourself. Once, a passenger next to me talked out loud on his mobile phone. I left my seat quietly, giving him some privacy to finish his conversation. He realized this and apologised to me. When his phone rang again later, he left his seat to answer it. You see, a bit of respect and cooperation can do the job better.

Taodas·29 minutes ago
I did read my newspaper out loud on a train, and it turned out well. The guy took it in good part, and we chatted happily all the way to Edinburgh.

Sophie 76·13minutes ago
I have not tried reading my newspaper out loud on a train, but ,several years ago, I read some chapters from Harry Porter to my bored and noisy children. Several passengers seemed to appreciate what I did.
The passenger made an apology to Angie O’Edema because____.

A.he offered his seat to someone else
B.he spoke very loudly on his phone
C.he refused to talk with Angie
D.he ignored Angie’s request

Who once read a newspaper out loud on a train?

A.Pak50 B.Angie O’Edema
C.Taodas D.Sophie76

What is the discussion mainly about?

A.How to react to bad behavior.
B.How to kill time on a train.
C.How to chat with strangers.
D.How to make a phone call.

Where is the passage most probably taken from?

A.A webpage. B.A newspaper.
C.A novel. D.A report.

【2015·重庆】B
In ancient Egypt, a shopkeeper discovered that he could attract customers to his shop simply by making changes to its environment. Modern businesses have been following his lead,with more tactics(策略).
One tactic involves where to display the goods. Foe example, stores place fruits and vegetables in the first section. They know that customers who buy the healthy food first will feel happy so that they will buy more junk food(垃圾食品)later in their trip. In department stores, section is generally next to the women’s cosmetics(化妆品) section:while the shop assistant is going back to find the right size shoe, bored customers are likely to wander over cosmetics they might want to try later.
Besides, businesses seek to appeal to customers’ senses. Stores notice that the smell of baked goods encourages shopping, they make their own bread each morning and then fan the bread smell into the store throughout the day. Music sells goods, too. Researchers in Britain found that when French music was played, sales of French wine went up.
When it comes to the selling of houses, businesses also use highly rewarding tactics. They find that customers make decision in the first few second upon walking in the door, and turn it into a business opportunity. A California builder designed the structure of its houses smartly. When entering the house, the customer would see the Pacific Ocean through the windows, and then the poll through an open stairway leading to the lower level. The instant view of water on both levels helped sell these $10 million houses.
Why do stores usually display fruits and vegetables in the first section?

A.To save customers times.
B.To show they are high quality foods.
C.To help sell junk food.
D.To sell them at discount prices.

According to Paragraph 3, which of the following encourages customers to buy?

A.Opening the store early in the morning.
B.Displaying British wines next to French ones.
C.Inviting customers to play music.
D.Filling the store with the smell of fresh bread.

What is the California builder’s story intended to prove?

A.The house structure is a key factor customers consider.
B.The more costly the house is, the better it sells.
C.An ocean view is much to the customers’ taste.
D.A good first impression increases sales.

What is the main purpose of the passage?

A.To explain how businesses turn people into their customers.
B.To introduces how businesses have grown from the past.
C.To report researches on customer behavior.
D.To show dishonest business practices.

【2015·浙江】D
In 2004 ,when my daughter Becky was ten , she and my husband ,Joe, were united in their desire for a dog . As for me , I shared none of their canine lust.
But why , they pleaded. “Because I don’t have time to take care of a dog.” But we’ll do it.”Really? You’re going to walk the dog? Feed the dog? Bathe the dog?” Yes, yes , and yes .”I don’t believe you .” We will . We promise.
They didn’t . From day two (everyone wanted to walk the cute puppy that first day ) , neither thought to walk the dog . While I was slow to accept that I would be the one to keep track of her shots , to schedule her vet appointments , to feed and clean her , Misty knew this on day one . As she looked up at the three new humans in her life (small, medium, and large) , she calculated ,”The medium one is the sucker in the pack .”
Quickly, she and I developed something very similar to a Vulcan mind meld (心灵融合) . She’d look at me with those sad brown eyes of hers , beam her need , and then wait , trusting I would understand — which , strangely , I almost always did . In no time , she became my feet as I read , and splaying across my stomach as I watched television .
Even so , part of me continued to resent walking duty . Joe and Becky had promised. Not fair , I’d balk (不心甘情愿地做) silently as she and I walked . “Not fair , ” I’ d loudly remind anyone within earshot upon our return home .
Then one day — January 1, 2007 , to be exact — my husband ‘ s doctor uttered an unthinkable word : leukemia ( 白血病) .With that , I spent eight to ten hours a day with Joe in the hospital , doing anything and everything I could to ease his discomfort. During those six months of hospitalizations, Becky, 12 at the time, adjusted to other adults being in the house when she returned from school. My work colleagues adjusted to my taking off at a moment's notice for medical emergencies. Every part of my life changed; no part of my old routine remained.
Save one: Misty still needed walking. At the beginning, when friends offered to take her through her paces, I declined because I knew they had their own households to deal with. As the months went by,I began to realize that I actually wanted to walk Misty. The walk in the morning before I headed to the hospital was a quiet, peaceful time to gather my thoughts or to just be before the day's medical drama unfolded. The evening walk was a time to shake off the day's upsets and let the worry tracks in my head go to white noise.
When serious illness visits your household, it's , not just your daily routine and your assumptions about the future that are no longer familiar. Pretty much everyone you acts differently.
Not Misty. Take her for a walk, and she had no interest in Joe's blood counts or ’one marrow test results. On the street or in the park, she had only one thing on her mind: squirrels! She Was so joyous that even on the worst days, she could make me smile. On a daily basis she reminded me that life goes on. After Joe died in 2009,Misty slept on his pillow.
I'm grateful一to a point. The truth is, after years of balking, I've come to enjoy m’ walks with Misty. As I watch her chase after a squirrel, throwing her whole being into the here-and-now of an exercise that has never once ended in victory, she reminds me, too, that no matter how harsh the present or unpredictable the future , there's almost always some measure of joy to be extracted from the moment.
why didn't the writer agree to raise a dog at the beginning of the story?

A.She was afraid the dog would get the family, into trouble.
B.It would be her business to take care of the dog
C.Her husband and daughter were united as one.
D.She didn't want to spoil he’ daughter.

Which of the following is the closest in meaning to "The medium one is “he sucker in the pack.” (Paragraph 3)?

A."The middle-aged person loves me most.”
B.”The medium-sized woman is the hostess.”
C."The man in the middle is the one who has the final say.”
D."The woman is the kind and trustworthy one in the family.”

It can be inferred from Paragraph 3 that_______.

A.Misty was quite clever
B.Misty could solve math problems
C.the writer was a slow learner
D.no one walked Misty the first day

The story came to its turning point when________.

A.Joe died in 2009
B.Joe fell ill in 2007
C.the writer began to walk the dog
D.the dog tired to please the writer

Why did the writer continue to walk Misty while Joe was in hospital?

A.Misty couldn’t live without her
B.Her friends didn’t offer any help
C.The walk provided her with spiritual comfort.
D.She didn't want Misty to ’others companion.

What is the message the writer wants to convey in the passage?

A.One should learn to enjoy hard times.
B.A disaster can change everything in life.
C.Moments of joy suggest that there is still hope ahead.
D.People will change their attitude toward you when you are in difficulty.

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