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.
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(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
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.The underlined word “offset” in Paragraph 10 most probably means “________”.
A.improve B.avoid
C.ignore D.achieve
高三英语阅读理解中等难度题
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.
高三英语阅读理解困难题查看答案及解析
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.
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(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
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.The underlined word “offset” in Paragraph 10 most probably means “________”.
A.improve B.avoid
C.ignore D.achieve
高三英语阅读理解中等难度题查看答案及解析
Experts insist that packets of cigarettes come with a health warning ______ to them.
A. be attached B. attach C. attached D. attaching
高三英语单项填空中等难度题查看答案及解析
Experts insist that packets of cigarettes come with a health warning ______ to them.
A. be attached B. attach C. attached D. attaching
高三英语单项填空中等难度题查看答案及解析
Experts have been warning ___ of the health risks caused by passive smoking.
A.at a time B.at one time
C.for some time D.for the time
高三英语单项填空中等难度题查看答案及解析
Experts have been warning___of the health risks caused by passive smoking.
A.at a time | B.at one time |
C.for some time | D.for the time |
高三英语单项填空中等难度题查看答案及解析
A new phone app uses shaking from smartphones to warn people about earthquakes. The new app is called MyShake, which is the work of four researchers at the University of California. Berkeley.
Smartphones are equipped with accelerometers(加速器). MyShake uses phone accelerometers to measure seismic (地震的) activity. It has been programmed to know the difference between normal activity and earthquake movement. The software developers say their app is right 93 percent of the time. A smartphone sends seismic information to the app developers. If the developers receive several warnings from one area, it recognizes that an earthquake may be taking place or will take place soon. Using information sent from the app, the network then judges the location and strength of the quake in real time. MyShake can record 5.0 earthquake at distances of 10 kilometers or less.
MyShake uses very little power, according to its developers. Only when seismic activity is sensed by the app does it become active and sends data to the network. The app works best when your phone is resting on a flat surface, like a table.
The developers hope that MyShake can add to information collected by the U.S Geological Survey. That U.S agency has created the Earthquake Early Warning System, also known as the EEW. The EEW has used sensors for measuring quakes in many areas. In places where no such equipment exists, MyShake may be the only method of early quake detection (发现). The app also shows ways to stay safer during an earthquake. The developers say it will become more effective as more people use it.
The developers say they hope to add a feature that will warn people about possible tsunami after an earthquake.
1.The new app
A. is a kind of accelerometer.
B. feels earthquakes through smartphones.
C. is developed by the U.S Geological Survey.
D. predicts possible tsunami after an earthquake.
2.What is the second paragraph mainly talking about?
A. How MyShake works.
B. What seismic activity is.
C. Why MyShake is developed.
D. When accelerometers record earthquake.
3.We can infer that MyShake
A. docs not work when the spartphone is in the pocket
B. sleeps while there is no shaking of the earth’s surface.
C. guides people how to survive when many people use it at the same time.
D. recognizes an earthquake when it receive the information from other sensors.
4.The new app developers hope to
A. use the information by the U.S Geological Survey to better MyShake.
B. unite the U.S Geological Survey to combine the EEW and MyShake.
C. help the EEW detect earthquakes somewhere.
D. improve the EEW.
高三英语阅读理解中等难度题查看答案及解析
The speech from the new government is a _______ that major changes are on the way.
A. warning B. symbol C. goal D. signal
高三英语单项填空简单题查看答案及解析
Experts warn that medical waste from hospitals, if properly, may contribute to spreading diseases.
A. not handled
B. not being handled
C. not to be handled
D. not having been handled
高三英语单项填空简单题查看答案及解析
Experts warn that medical waste from hospitals, if properly, may contribute to spreading diseases.
A.not handled B.not being handled
C.not to be handled D.not having been handled
高三英语单项填空简单题查看答案及解析