If you are sitting down listening to what I’m going to say, stand up. Move your legs. Touch your toes, if you can. Do anything but sit.
If you cut down on the time you spend sitting, you might live longer. New research shows that sitting less than three hours a day might extend your life by two years.
Just the opposite, says Peter Katzmarzyk. He is a scientist at the University of Louisiana in the southern United States. He says that sitting is ubiquitous in our lives. "We sit while we're eating; we sit in the car; we sit while we watch TV. Many of us sit for many hours at work. " But, he adds, that does not make sitting good for us. The human body is designed to move. But modern lifestyles and office jobs rarely give us the chance to move around.
Exercise is important. So is not sitting.
"We can't throw away physical activity. It's extremely important. We have 60 years of research showing us that. Even if you exercise for 30 minutes a day, what goes on in the other 23-and-a-half hours a day is also very important."
Mr. Katzmarzyk and his co-workers are part of a new generation of researchers studying how sitting all day affects length of life. This is a relatively new area of study—studies that have assessed the relationship between sitting and mortality(死亡) or television viewing and mortality.
Making uses of the few studies available to them, they found that cutting television time to less than two hours a day could add one-point four years to life.
New desk designs are helping
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. That's one of the strategies that many companies are using now. Some companies may equip their employees with a "standing desk" or a "treadmill desk". Other companies may not buy one for everybody, but they'll have a bank of these desks where people can go for an hour a day and answer their emails or talk on the phone. Even some U.S. schools are beginning to experiment with such desks to keep children moving.
Mr. Katzmarzyk says studying this problem has inspired his team to make a few changes in their own lives. "As a university professor, you know, it is a very sedentary occupation. We're chained to a desk in terms of writing papers and doing research. We really try to limit the amount of time we spend doing that."
Suggestions for sitting less
If you work in office job or have a sedentary job, Mr. Katzmarzyk and his team suggest a few simple changes:
get up from your desk as often as you can take walks at lunch time walk to your colleagues’ offices and talk directly instead of emailing them All these activities may help you live longer.
1.What might be the best title for the passage?
A. Take exercise, keep fit.
B. Change more, achieve greater.
C. Talk directly, improve relationship.
D. Sit less, live longer.
2.The word “ubiquitous ” (in Para. 3) means “_______”.
A. common B. normal
C. individual D. specific
3. Mr Katzmarzyk holds the view that _______.
A. the study doesn’t benefit him at all
B. it’s unnecessary to limit television time
C. emailing colleagues is better than a face-to-face talk
D. those taking exercises 30 minutes a day still can’t sit long
4. The passage is most likely to be _______.
A. a medical research B. a book review
C. a health report D. a sports feature
高三英语阅读理解中等难度题
If you are sitting down listening to what I’m going to say, stand up. Move your legs. Touch your toes, if you can. Do anything but sit.
If you cut down on the time you spend sitting, you might live longer. New research shows that sitting less than three hours a day might extend your life by two years.
Just the opposite, says Peter Katzmarzyk. He is a scientist at the University of Louisiana in the southern United States. He says that sitting is ubiquitous in our lives. "We sit while we're eating; we sit in the car; we sit while we watch TV. Many of us sit for many hours at work. " But, he adds, that does not make sitting good for us. The human body is designed to move. But modern lifestyles and office jobs rarely give us the chance to move around.
Exercise is important. So is not sitting.
"We can't throw away physical activity. It's extremely important. We have 60 years of research showing us that. Even if you exercise for 30 minutes a day, what goes on in the other 23-and-a-half hours a day is also very important."
Mr. Katzmarzyk and his co-workers are part of a new generation of researchers studying how sitting all day affects length of life. This is a relatively new area of study—studies that have assessed the relationship between sitting and mortality(死亡) or television viewing and mortality.
Making uses of the few studies available to them, they found that cutting television time to less than two hours a day could add one-point four years to life.
New desk designs are helping
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. That's one of the strategies that many companies are using now. Some companies may equip their employees with a "standing desk" or a "treadmill desk". Other companies may not buy one for everybody, but they'll have a bank of these desks where people can go for an hour a day and answer their emails or talk on the phone. Even some U.S. schools are beginning to experiment with such desks to keep children moving.
Mr. Katzmarzyk says studying this problem has inspired his team to make a few changes in their own lives. "As a university professor, you know, it is a very sedentary occupation. We're chained to a desk in terms of writing papers and doing research. We really try to limit the amount of time we spend doing that."
Suggestions for sitting less
If you work in office job or have a sedentary job, Mr. Katzmarzyk and his team suggest a few simple changes:
get up from your desk as often as you can take walks at lunch time walk to your colleagues’ offices and talk directly instead of emailing them All these activities may help you live longer.
1.What might be the best title for the passage?
A. Take exercise, keep fit.
B. Change more, achieve greater.
C. Talk directly, improve relationship.
D. Sit less, live longer.
2.The word “ubiquitous ” (in Para. 3) means “_______”.
A. common B. normal
C. individual D. specific
3. Mr Katzmarzyk holds the view that _______.
A. the study doesn’t benefit him at all
B. it’s unnecessary to limit television time
C. emailing colleagues is better than a face-to-face talk
D. those taking exercises 30 minutes a day still can’t sit long
4. The passage is most likely to be _______.
A. a medical research B. a book review
C. a health report D. a sports feature
高三英语阅读理解中等难度题查看答案及解析
_____ going to the program “If you are the one”, he was rather concerned about being turned down in public.
A．Much as he liked B．However he liked
C．As he liked much D．As much he liked
高三英语单项填空困难题查看答案及解析
—“What courses are you going to take next semester if you want to receive enough credits to get your degree?”
—“I don’t know. But it’s about time________on something.”
A．I’d decide B．I decide C．I’m deciding D．I decided
高三英语单项填空中等难度题查看答案及解析
(2012·福建卷)—What are you going to do this weekend?
—________.If time permits，I may go to Shanghai with my friends.
A．Don’t mention it B．It doesn’t matter
C．Forget it D．It depends
高三英语单项填空中等难度题查看答案及解析
You have to know ________ you're going if you are to plan the best way of getting there.
A. what B. that C. where D. who
高三英语单项填空中等难度题查看答案及解析
You have to know ________ you're going if you are to plan the best way of getting there.
A. what B. that
C. where D. who
高三英语单项填空中等难度题查看答案及解析
If they ________what I was saying, they'd know what I was talking about
A．took the trouble to listen to B．had trouble listening to
C．take the trouble to listen to D．have trouble listening to
高三英语单项填空中等难度题查看答案及解析
If they ______ what I was saying, they'd know what I was talking about.
A. took the trouble to listen to B. had trouble listening to
C. take the trouble to listen to D. have trouble listening to
高三英语单项填空中等难度题查看答案及解析
If you sit down to play an old-school board game like chess this holiday season, it might be surprising to keep in mind just how bad you'd be against a computer. In fact, computers have shown they're capable of taking humans' lunch money at board games for a while now. Remember Deep Blue versus Gary Kasparov in 1997 or AlphaGo against Lee Sedol, in South Korea, at the game of Go(围棋), in 2016?The computer won.
Now, the same team that created the Go-playing robot is celebrating something more powerful: an artificial intelligence system that is capable of teaching itself and winning at three different games.
They call it AlphaZero, and it knows two kinds of chess and Go. All of these games fall into the kind of “full information” or “perfect information” contests-each player can see the entire board and has access to the same information. That's different from games like poker, for example, where you don't know what cards an opponent is holding.
“AlphaZero needs to be told the rules of the games first, and after that, it learns by competing with itself in the games,” says Julian Schrittwieser."It suggests that we have a good chance to extend this to even more real-world problems that we might want to solve later."
And board games have historically been a good way to test computers' abilities. “It took us decades of work on these games to reach the point where AlphaZero can perform them better than people,” Campbell says. “I think they've served the field very well. They've allowed us to explore techniques such as the ones used in AlphaZero, which will be helpful as the field aims at more complex tasks.” Campbell adds. “And that is the whole point in the first place of solving games-it isn't for their own sake, but for it is a limited kind of environment where we can make progress in many other branches of science and technology.”
1.What's the author's main purpose in mentioning the two games in paragraph 1?
A.To show computers are bad at playing board games,
B.To prove computers can defeat humans at board games.
C.To emphasize humans are capable of playing computer games.
D.To demonstrate people can earn money by playing board games.
2.What is paragraph 3 mainly about?
A.The operating principle of AlphaZero. B.The differences between chess and Go.
C.The information about hi-tech contests. D.The features of the games AlphaZero knows.
3.How can AlphaZero learn in the games?
A.By playing the games against itself. B.By playing multiple online games.
C.By being programmed by humans. D.By setting the rules of the games.
4.What does Campbell say about board games?
A.They help solve computers' problems.
B.They are used to test people's abilities.
C.Their techniques can be applied to other fields.
D.Their technology can be merely limited in games.
高三英语阅读理解中等难度题查看答案及解析
It is said that if you want to stay young, sit down and have a good think. This is the research finding of a team of Japanese doctors, who say that most of our brains are not getting enough exercise — and as a result, we are growing old unnecessarily soon.
Professor Taiju Matsuzawa wanted to find out why otherwise healthy farmers in northern Japan appeared to be losing their ability to think and reason at a relatively early age, and how the process of aging could be slowed down. With a team of colleagues at Tokyo National University, he set about measuring brain volumes of a thousand people of different ages and varying occupations. Computer technology enabled the researchers to obtain precise measurements of the volume of the front and side parts of the brain, which controls functions like eating and breathing, does not contract with age, and one can continue living without intellectual on economical faculties. Contraction of front and side parts — as cells die off — was observed in some subjects in their thirties, but it was still not evident in some sixty-and seventy-year-olds. Matsuzawa concluded from his tests that there is a simple way to the contraction normally connected with age — using the head.
The findings show in general terms that contraction of the brain begins sooner in people in the country than in the town. Those least at risk, says Matsuzawa, are lawyers, followed by university professors and doctors. White collar workers doing routine work in government offices are, however, as likely to have shrinking (萎缩) brains as the farm worker, bus driver and shop assistant.
Matsuzawa's findings show that thinking can prevent the brain from shrinking. Blood must circulate properly in the head to supply the fresh oxygen the brain cells need. “The best way to maintain, good blood circulation is through using the brain.” he says. “Think hard and engage in conversation. Don’t rely on pocket calculators.”
1.The team of doctors wanted to find out ______.
A. the size of certain people's brains
B. how to make people live longer
C. which people are most intelligent
D. why certain people are aging sooner than others.
2.On what are their research findings based?
A. The study of brain volumes of different people.
B. The study of brain volumes of old people.
C. The latest development of computer technology.
D. A survey of farmers in northern old people.
3.The doctors’ tests show that _______.
A. our brains shrink as we grow older
B. the front section of the brain does not shrink
C. sixty-year-olds have better brains than thirty-year-olds
D. some people's brains have contracted more than other people's
4.According to the passage, which people seem to age more slowly than the others?
A. Lawyers. B. Farmers.
C. Clerks. D. Shop assistants.
高三英语阅读理解中等难度题查看答案及解析