A study published Monday found that people who sleep less tend to be fat, and experts said it’s time to find out if more sleep will fight fatness.
“We’ve put so much emphasis on diet and exercise that we've failed to recognize the value of good sleep,” said Fred Turek, a physician at Northwestern University.
Monday’s study from Eastern Virginia Medical School in Norfolk covered 1,000 people and found that total sleep time decreased as body mass index - a measure of weight based on height - increased.
Men slept an average of 27 minutes less than women and overweight and fat patients slept less than patients with normal weights, it said. In general the fatter subjects slept about 1.8 hours a week less than those with normal weights.
“Americans experience insufficient sleep and fat bodies. Clinicians are aware of the burden of fatness on patients,” the study said.
“Our findings suggest that major extensions of sleep time may not be necessary, as an extra 20 minutes of sleep per night seems to be associated with a lower body mass index,” it added.
“We caution that this study does not establish a cause-and-effect relationship between restricted sleep and fatness (but) investigations indicating success in weight loss via extensions of sleep would help greatly to set up such a relationship.”
The study was published in the Archives of Internal Medicine along with an editorial by Turek and Northwestern colleague Joseph Bass commenting on it and related research.
In an interview, Turek said some studies have shown sleep causes declines in an appetite suppressing protein hormone, and increases in another hormone that causes a longing for food. In addition neuropathies（神经疗法）in the brain governing sleep and fatness appear to overlap（重叠）, he said.
Patness has been rising dramatically in developed countries and reached epidemic（流行病） levels in the United States, it added, leading to a variety of health problems.
66. What’s the passage mainly about?
A. People who sleep less tend to get fat.
B. Fat people need lots of sleep to lose weight.
C. Sleeping has nothing to do with fatness.
D. Fatness has been rising dramatically in developed countries.
67. According to the passage, which of the following is TRUE?
A. Lack of sleep causes declines in a desire limiting protein hormone.
B. Americans experience sufficient sleep and fat bodies.
C. The findings suggest that major extensions of sleep time may be necessary.
D. Fatness has been rising dramatically in America.
68. Which of the following is NOT close to the underlined word suppress?
A. limit B. restrict C. accept D. control
69. According to the passage, which of the following people is the lowest possible one to get fatness?
A. Americans B. Chinese C. Japanese D. English
70. We can conclude the attitude of the author is according to the passage.
A. worried B. uninterested C. critical D. optimistic
Riding a motorcycle is a popular way to travel. A motorcycle often has better acceleration than the fastest . A motorcycle can traffic jams and can speed ahead while the cars wait. A motorcycle is to run --- you need less petrol per mile for a motorcycle than for most cars.
But this doesn’t explain why, for some people, motorcycles are a way to travel, they are a way of life. Everybody knows about the problems of riding a motorcycle. It’s quiet dangerous. It’s very uncomfortable too. However well dressed for a ride the motorcyclist is, wind and rain make the journey difficult and . And then, motorcycles often .
But the motorcyclist doesn’t care!
Take a look at any motorcycle magazine and you will have an idea of what motorcycling means to the enthusiast. The keen motorcyclist may sometimes think about the of his way of life. But he will still go ‘on the ride’ whenever he can!
|
|
|
|
|
|
|
|
National parks in the UK are a wonder to see, run by the National Trust, a non-profit charity which maintains Great Britain's historical and natural landscapes. Britain's park Authority has made planning restrictions to protect these wilderness areas in housing and commercial activities.
Mainland England and Wales have the largest number of protected parks. The first established area was the l,438 kilometer Peak District. The first national park lies in northern and central England. The Peak District with vast beauty is thought to be the world's most visited national park after Japan's Mount Fuji.
In the northwest area of Wales lies Snowdonia National Park. This attractive, mysterious ancient landscape is home to steep mountains. Walking trails to Mount Snowdon is only one of several exciting activities for hikers.
National parks in the UK can also boast of having Britain's largest protected wetland "The Broad", just outside the village of Homing. An ideal spot for families, this 200-mile area combines waterways with an interesting intersection(交叉) of windmills, castles and an ancient Normal church.
Spreading across 885 miles of truly impressive rocky land is Lake District National Park. England's largest park attraction is spread between Edinburgh to the north and Manchester to the south. Although the land itself seems wild, almost 40,000 people live within the park. Within this district's vast borders we can find over 6,000 archaeological(考古的) sites and monuments dating back to prehistory.
The United Kingdom has taken great care to preserve its wilderness areas for the future generations, and all the parks are adventures waiting to De found which can be enjoyed by both natives and visitors.Who is in charge of the National parks in the UK? (no more than 3 words)
According to the passage, which is thought to be the world's most visited national park? (no more than 5 words)
If you want to see ancient monuments, where would you go? (no more than 4 words)
For whom are the wild areas preserved in the UK? (no more than 4 words)
What's the text mainly about? (no more than 6 words)
I give two examples as to why intelligent life may not actually exist, though I admit that for me, or even for a physicist who devoted his or her entire life to researching and studying the universe, it's shocking to claim that completely no life exists elsewhere.
Keeping that in mind, I'd just like to consider conditions elsewhere in the known universe. You really only need to look at our own solar system or the Earth at certain periods in its own history to appreciate that most places are much worse and much less suitable for life than our mild, watery globe.
So far, space scientists have discovered about seventy planets outside the solar. But it appears that if you wish to have a planet suitable for life, you just have to be very lucky, and the more advanced the life is, the luckier you'll have to be. I'm by no means a space observer, but I can recognize some particularly fortunate breaks we've had on the Earth. For example:
We are, to a degree, at the right distance from the perfect type of star, the one that is big enough to radiate a huge amount of energy, but not so big as to bum itself out quickly. Had our sun been ten times as huge, it would have burnt out completely after only ten million years, instead of ten billion and surely we would not exist. Too near, everything on the Earth would have boiled and withered away; any further, everything would have frozen over.
The universe is a surprising place, and our existence within it is a wonder. If a long and unimaginably complex sequence of events dating back 4.6 billion years or so hadn't happened in a particular manner at a particular time --if, to take just one example, the dinosaurs hadn't been wiped out by a meteor(流星)--we might still be a few centimeters long, with whisker(胡须) and a tail, and you'll be reading this in a cave somewhere.What's the best title for this passage?
| A．No Life Exists out of the Earth |
| B．Seventy Planets Discovered |
| C．A Place Full of Wonders |
| D．Perfect Conditions for Life |
What makes the Earth more suitable for life than other planets in the solar system?
| A．The Earth is the only planet that can receive energy from the sun. |
| B．The sun is at the right distance from us and in proper size. |
| C．The distance between the planets was neither too long nor too near. |
| D．The dinosaurs were no longer a threat to the Earth. |
What does the underlined phrase "withered away" in the 4th paragraph mean?
| A．Exploded. | B．Expanded. | C．Floated away. | D．Dried and died. |
Where does the text probably come from?
| A．A history book. | B．A magazine. | C．A science fiction. | D．A famous novel. |
WELLINGTON, September 19 (Xinhua) -- If your teenage son won't get out of bed in the morning, then take comfort from the fact that he might be sleeping his way to a healthier future, according to a new research from New Zealand.
Researchers in human nutrition at the University of Otago have found that teenage boys who sleep less have more body fat when compared to girls, for whom lack of sleep has no noticeable effect on their body fat ratios.
The study of 386 boys and 299 girls aged 15 to 18 found that average-sized 16-year-old boy weighing 69.5 kg and 176 cm tall, who slept for eight hours a day, had a waist size l.8 cm bigger and l.6 kg, or 9 percent, more body fat than the average-sized boy who slept 10 hours a day.
"The boys who slept eight hours a day would also have l.8 kg more lean (bone and muscle) mass compared to the boys who slept 10 hours, but that's only a 1.4-percent increase, compared to the 9- percent increase seen in body fat," said lead researcher from the Department of Human Nutrition, Dr. Paula Skidmore.
"Our results suggest that for older teenage boys, making sure that they get enough sleep may help to maintain a healthier body. It seems to be that, within reason, the more sleep the better for boys," Skidmore said in a statement Thursday.
"It was unexpected that we did not find the same result in girls, who may actually be more aware of their diet and more in tune with a healthier lifestyle."
The researchers ruled out the effects of food choice and number of screens, such as televisions, games and consoles, which the teenagers had in their bedrooms.What's the research really about?
| A．Boys and girls. | B．Food and weight. | C．Sleep and health. | D．Screens and fat. |
What's the result of less sleep for teenage boys?
| A．Bigger waist and more fat in the body. |
| B．An increase in weight and height. |
| C．More concerned with their diet. |
| D．A decrease in bone and muscle. |
From the sixth paragraph we can infer that ______.
| A．girls usually sleep less and have healthier lifestyles than boys |
| B．the researchers expected to see the same result in girls |
| C．peoples' diet has a great effect on their health |
| D．boys are usually lazier than girls |
Who would be the most pleased to hear the news?
| A．Teachers. | B．Girls. | C．Parents. . | D．Boys. |
Back in old times, people had little knowledge about the universe and nature. Things we now consider to be common sense were mysteries to our ancestors.
Over the years, major breakthroughs have been made in science and many phenomena have been explained. But still, there are always questions we can't yet answer, and The Guardian has listed some of them.
1. What makes us human?
Just looking at your DNA won't tell you - human DNA is 99 percent identical to that of the chimpanzee and, believe it or not, 50 percent identical to a banana's! A lot of the things we once thought were unique about us - language and tool use, recognizing ourselves in the mirror and so on – have since been seen in other animals. Perhaps it's our culture that makes the difference or maybe our ability to use fire. It's also possible that our capacity (能力) for co-operation and our trading skills are what make us unique.
2. Why do we dream?
Given the fact that we spend around a third of our lives sleeping, shouldn't we know everything about it? Unfortunately, scientists are still searching for a complete explanation of what happens when we sleep and why we dream.
Austrian psychologist Sigmund Freud believed dreams were the expressions of wishes that we can't fulfill in our real lives. Others have wondered whether dreams are just random "noise" coming from a sleeping brain.
3. Could we someday live forever?
Apart from accidents, most people die because of diseases that can be treated and aging. And since many diseases, such as diabetes（糖尿病） and cancer, are diseases of aging, treating aging itself could be the key to extending our lives.
Our knowledge of what causes us to age - and what allows some animals to live longer than others - is expanding rapidly. And though we haven't quite worked out all the details, we've worked out some pieces of the puzzles such as DNA damage and metabolism (新陈代谢), which are all leading to the invention of drugs that can slow down the aging process.
If we're lucky enough to lengthen our lives, we might even get to see the day when all of these questions are answered.The main point of the passage is ______.
| A．to inform people of the knowledge about the universe and nature |
| B．to introduce major breakthroughs that have been made in science |
| C．to present some questions we can't yet answer |
| D．to explain what were once mysteries to our ancestors |
Chimpanzees and bananas are mentioned as examples to prove that ______.
| A．human beings are actually not different from other animals |
| B．animals have completely different DNA from that of plants |
| C．both animals and plants share the same amount of DNA |
| D．DNA alone is not good enough to make humans different |
The underlined word "identical" is closest in meaning to ______.
| A．mysterious | B．unique | C．advanced | D．same |
Which of the following statements is TRUE according to the passage?
| A．What were mysteries to our ancestors are considered to be common sense now. |
| B．Now we know much more about dreams than our ancestors did in the past. |
| C．With the invention of new drugs people can possibly live even longer. |
| D．If all the diseases can be treated people can theoretically live forever. |
粤公网安备 44130202000953号