The human body is designed to move. But modern lifestyles and office jobs rarely give us the chance to move around. As we know. we're while we're eating; we sit in the car and we sit while we watch TV. And many of us sit for many hours at work.

New research shows that sitting less than three hours a day might extend your life by two years. Peter Katzmarzyk，a scientist at the University of Louisiana in the southern United States，says that sitting is ubiquitous in our lives，meaning it is something we do all the time，everywhere.

However，Mr. Katzmarzyk says that does not mean you can sit for the rest of your waking hours. He also says you may exercise often，“We can't throw away physical activity. It's extremely important. We have 60 years of research showing us that. ”

Mr. Katzmarzyk and his coi leagues are part of a new generation of researchers studying how sitting all day affects length of life. “Studies that have assessed the relationship between sitting and mortality(死亡率)or television viewing and mortality are very rare. There's only been a few of them，actually five or six now，in the last four or five years. ”They found that cutting television time to less than two hours a day could add one-point four years to life.

Luckily，change is already coming to some offices，especially in the design of desks. A “standing desk”lets people stand while they work. Another new design is called the “treadmill desk. ” A treadmill is an exercise machine that lets you walk in one place. Even some U. S. schools are beginning to experiment with desks that are part bicycle to keep children moving. That's one of the strategies that many companies are using now.

Mr. Katzmarzyk also says studying this problem has inspired his team to make a few changes in their own lives.

1.Which view agrees with the opinion of Mr. Katzmarzyk?

A． Sitting too long may help increase one's life.

B． Exercise is important and don't sit too long.

C． Watching TV is bad，but can broaden one's horizons.

D． Stopping watching TV is a necessary but hard task.

2.What does Mr. Katzmarzyk think of his study in Paragraph 4?

A． It's a ly new area of study.

B． It's a hot subject studied by experts.

C． It's a study that begins too late.

D． It's not ignored by many experts.

3.Why are the desks of all kinds designed for those who sit more?

A． To give them more comfort.

B． To improve their work efficiency.

C． To offer them the chance to exercise.

D． To seek pleasure while working.

練習(xí)冊系列答案
相關(guān)習(xí)題

科目：高中英語 來源：2016屆山西省高三上學(xué)期期中考前檢測英語試卷（解析版） 題型：閱讀理解

Alaska’s Arctic lakes now freeze later and melt earlier in the year than in 1950，leaving them easy to suffer water loss from evaporation(蒸發(fā))and possibly adding to local warming，a new study finds．The winter ice season near Barrow，Alaska，is shorter than in 1950，researchers reported Jan.30 in the journal The Cryosphere.

Lake ice is also thinner each winter．The scientists surveyed 402 lakes on the North Slope，where permafrost (permanently frozen ground)and shallow lakes dominate the areA． In 2011，the lake ice was 38 percent thinner than in 1950，and 22 percent fewer lakes froze through to their bottoms．

“When we saw the actual numbers we were shocked at how dramatic the change has been，”lead study author Cristina Surdu，of the University of Waterloo in Canada，said in a statement．Surdu and her co-authors analyzed the changes in lake—ice thickness and ice cover with satellite images and climate model simulations(satellite images are only available from 1991)．

The climate models suggest the Arctic lakes froze almost six days later and broke up about 18 days earlier in the winter of 2011 compared with the winter of 1950．“The changes in ice and the shortened winter affect Northern communities that depend on ice roads to transport goods，”Surdu saiD． For example，every winter，oil companies build roads over frozen lakes to carry supplies to Prudhoe Bay．

“The dramatic changes in lake ice may also contribute to further warming of the entire region，because open water on lakes contributes to warmer air temperatures，”Surdu saiD． The Arctic is warming twice as fast as the rest of the planet，for reasons that may include its layered atmosphere，which traps heat，and the loss of sea ice and snow cover，which help reflect the sun’s energy when present．

1.What does the text mainly tell us?

A． Arctic 1akes now freeze earlier and melt 1ater．

B． Alaska’s local warming is decreasing sharply．

C． Arctic lakes are losing ice．

D． Arctic lakes hold more flesh water than before．

2.According to the text，the great changes of Alaska’s Arctic lakes ________．

A． are totally beyond Surdu’s expectations

B． are completely within Surdu’s expectations

C． come as no surprise to Surdu and her co-authors

D． come as a great excitement to Surdu

3.How many days was the winter ice season of Arctic 1akes in 2011 shorter than that in 1950?

A． 6 days．

B． 12 days．

C． 18 days．

D． 24 days．

4.What is the last paragraph mainly about according to Surdu?

A． What reflects the sun’s energy．

B． How its layered atmosphere traps heat．

C． Why our planet is warming．

D． Why the Arctic region is becoming warmer．

查看答案和解析>>

科目：高中英語 來源：2015-2016學(xué)年內(nèi)蒙古包頭九中學(xué)高一12月月考英語試卷（解析版） 題型：語法填空

閱讀下面材料，在空白處填入適當(dāng)?shù)膬?nèi)容（一個詞）或括號內(nèi)單詞的正確形式。

Why is pink or purple a color for girls and blue or brown for boys?

The answer depends largely ____1._____ cultural values as well as personal experiences. To the Egyptians, green was a color ___2.____ represented the hope and joy of spring, while for Muslims, it means heaven. Red is a symbol of good luck in many cultures. During the Spring Festival in China, children __3.____(give) money in a red envelope to bring good fortune in the New Year. For many nations, blue is symbol of protection and religious beliefs. Greek people often wear a blue necklace hoping to protect __4.___ against evils（災(zāi)禍）.

People’s ___5.____(choose) of colors is also influenced by their bodies’ reactions toward them. Green is said to be ___6.__ most restful color. It has the ability to reduce pain and relax people both mentally ___7.__ physically. People ___8.___ (work) in green environment have been found to have fewer stomach aches.

Red can cause a person’s blood pressure to rise and increase people’s appetites（食欲）. Many decorators will include different shades of red in the restaurant. And many commercial websites will have a red “Buy Now” button because red is a color that __9.___ (easy) catches a person’s eye.

Blue is another calming color. Unlike red, blue is believed to cause people to lose appetite. So __10.__ you want to eat less, some suggest that eating from blue plates can help.

查看答案和解析>>

科目：高中英語 來源：2016屆吉林東北師大附中凈月校區(qū)高三上二模英語試卷（解析版） 題型：短文改錯

短文改錯

假段定英語課上老師要求同桌之間交換修改作文, 請你修改你同桌寫的以下作文。文中共有

10處語言錯誤, 每句中最多有兩處。錯誤僅涉及一個單詞的增加、刪除或修改。

增加：在缺詞處加一個漏字符號(), 并在其下面寫出該加的詞。

刪除：把多余的詞用(＼)劃掉。

修改：在錯的詞下畫一橫線, 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）不計分。

The new term is coming! It's time for school. Last term, I make little effort on my English, but my grades were not satisfying. During the holiday, I realized English was of great important and made up my mind to make a progress. My plan goes as follows: for one thing, I will learn new words for at least 20 minutes every morning and recite a l00-words paragraph; for another, I will try to be actively in class. Besides, on my spare time, I will read more books about different topics open my mind. I think I can improve me a lot in this way, because that there is a will, there is a Way.

查看答案和解析>>

科目：高中英語 來源：2015-2016學(xué)年河南陜州中學(xué)高二上第二次精英對抗賽英語試卷（解析版） 題型：語法填空

語法填空：閱讀下列材料，在空白填入適當(dāng)?shù)膬?nèi)容或括號單詞的正確形式。

One morning, I was waiting at the bus stop, worried about __1.___ (be) late for school. There were many people waiting at the bus stop, __2.____ some of them looked very anxious and ____3.______ (disappoint). When the bus finally came, we all hurried on board. I got a place next ___4.__ the window, so I had a good view of the sidewalk. A boy on a bike ___5.___ (catch) my attention. He was riding beside the bus and waving his arms. I heard a passenger behind me shouting to the driver, but he refused ___6.____ (stop) until we reached the next stop. Still, the boy kept _____7.___ (ride). He was carrying something over his shoulder and shouting. Finally, when we came to the next stop, the boy came up to the door of the bus, I heard an excited conversation. Then the driver stood up and asked, “_8.___ anyone lose a suitcase at the last stop?” A woman on the bus shouted, “Oh dear! It’s __9.____.” She pushed her way to the driver and took the suitcase thankfully. Everyone on the bus began talking about what the boy had done, and the crowd of strangers ____10.__(sudden) became friendly to one another.

查看答案和解析>>

科目：高中英語 來源：2016屆江西省、九江一中高三上學(xué)期期中英語試卷（解析版） 題型：閱讀理解

Summer Holiday Fun 2015!

The summer holidays are upon us again．Here is our guide to summer holiday fun in Peterborough!

Peterborough Museum

The Age of the Dinosaurs is the museum's main attraction this summer．Get up close to prehistoric creatures via some great hands-on exhibits！Watch out for monsters lurking around every ember！The museum is open from 10:00 am to 5:00 pm Monday to Saturday，and from 12:00 pm to 4:00 pm on Sundays in August.

Call 01733 864663 for details.

Saxon Youth Club

School holiday fun：Young people aged 13—19 will be able to produce their own music，compete in sports activities，or try their hand at cooking at Saxon Youth Club，Saxon Community Centre，Norman Road，Peterborough every Monday and Wednesday from 3:00 pm．PLUS an aero ball tournament will take place on Thursday，12th August between 3:30 pm and 6:30 pm.

Call 01353 720274 for details.

Houghton Mill

Through the Looking Glass—a new production of the family favorite on Monday 30th，August．Bring rugs or chairs to sit on and a picnic if you wish to eat during the play．Gates open 5:30 pm，performance 6:30 pm—8:30 pm．Tea room will be open until the end of the interval．Adult ￡ 10 Child ￡7 Family ￡20.

Booking advisable on 0845 4505157.

Farmland Museum and Denny Abbey

Farmland Games：From Wellie Wanging to Pretend Ploughing matches，come and join the Farmland Team．Collect your sporting stickers and create a colorful rosette that is fit for a winner！No need to book，just turn up between 12:00 pm and 4:00 pm on Thursday，19th August．Suitable for children aged four and above，each child should be accompanied by an adult and all activities are included in the normal admission price．Tickets Cost：￡ 7 per child.

For further information，call 01223 810080.

1.If you are interested in cooking，you can go to ________.

A． Peterborough Museum

B． Houghton Mill

C． Saxon Youth Club

D． Farmland Museum

2.You want to watch the new play with your parents，so it will cost you ________.

A． ￡7

B． ￡17

C． ￡27

D． ￡20

3.Which of the following activities needs parents' company?

A． Playing farmland games．

B． Watching the new play.

C． Competing in sports activities．

D． Visiting the dinosaur exhibition.

查看答案和解析>>

科目：高中英語 來源：2016屆廣東百所學(xué)校高三12月質(zhì)量分析聯(lián)合考試英語試卷（解析版） 題型：短文改錯

短文改錯

假定英語課上老師要求同桌之間交換修改作文, 請你修改你同桌寫的以下作文。文中共

有10處錯誤, 每句中最多有兩處。錯誤涉及一個單詞的增加、刪除或修改。

增加: 在缺詞處加一個漏字符號(∧), 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: 在錯的詞下劃一橫線, 并在該詞下面寫出修改后的詞。

注意:

1. 每處錯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)不計分。

In our daily life, music plays important part. It can give us energy and making us happy. There is many kinds of music, such as country music, R&B, rock music and so on. Different people have different idea about music. Betty enjoys listen to the music that she can dance to, because she enjoys dancing. Many thinks jazz is really cool. John likes rock music and dance music. He thinks that them are interesting. Jane likes listening to some relaxed music. She likes country music a lot of, because it is easy to learn, and this kind of music is usual about our lives. What about you? What kind of music and did you prefer?

查看答案和解析>>

科目：高中英語 來源：2015-2016學(xué)年吉林長春第二中學(xué)高二上第三次月考英語試卷（解析版） 題型：短文改錯

短文改錯

Family is a most important part in my father’s life. He usually helps my mother do housework if he has any free time. Although he is a busy businessman, but he spends a lot of his free time hang out with my brother and me. He always supports my education. He sent me to the best schools and allow me to study abroad when I was 18. And he always listens to my idea even though they are stupid sometime. My father has a warm heart, whom is famous in our community. Most of my neighbors know my father because his kindness. Every time he sees the homeless in the street, he stops to give him some money. At weekends, he provides free rides for old people of our community.

查看答案和解析>>

科目：高中英語 來源：2016屆浙江三校等高三第一次五校聯(lián)考英語試卷（解析版） 題型：單項填空

The classical Chinese folk music ________ a wave of homesickness among the overseas students.

A. set out B. set off

C. set about D. set on

查看答案和解析>>

同步練習(xí)冊答案