Here is an astonishing and significant fact: Mental work alone can't make us tired. It sounds absurd. But a few years ago, scientists tried to find out how long the human brain could labor without reaching a stage of fatigue(疲劳). To the amazement of these scientists, they discovered that blood passing through the brain, when it is active, shows no fatigue at all! If we took a drop of blood from a day laborer, we could find it full of fatigue toxins(霉素) and fatigue products. But if we took blood from the brain of an Albert Einstein, it would show no fatigue toxins at the end of the day.
So far as the brain is concerned, it can work as well and swiftly at the end of eight or even twelve hours of efforts as at the beginning. The brain is totally tireless. So what makes us tired?
Some scientists declare that most of our fatigue comes from our mental and emotional(情感的) attitudes. One of England's most outstanding scientists, J. A. Hadfield, says，“The greater part of the fatigue from which we suffer is of mental origin. In fact, fatigue of purely physical origin is rare.” Dr. Brill, a famous American scientist, goes even further. He declares，“One hundred percent of the fatigue of a sitting worker in good health is due to emotional problems.”
What kinds of emotions make sitting workers tired? Joy? Satisfaction? No! A feeling of being bored, anger, anxiety, tenseness, worry, a feeling of not being appreciated—those are the emotions that tire sitting workers. Hard work by itself seldom causes fatigue. We get tired because our emotions produce nervousness in the body.What surprised the scientists a few years ago?
| A．Fatigue toxins could hardly be found in a laborer's blood. |
| B．Albert Einstein didn't feel worn out after a day's work. |
| C．The brain could work for many hours without fatigue. |
| D．A mental worker's blood was filled with fatigue toxins. |
According to the author, which of the following can make sitting workers tired?
| A．Challenging mental work. | B．Unpleasant emotions. |
| C．Endless tasks. | D．Physical labor. |
What's the author's attitude towards the scientists' ideas?
| A．He agrees with them. |
| B．He doubts them. |
| C．He argues against them. |
| D．He hesitates to accept them. |
We can infer from the passage that in order to stay energetic, sitting workers need to ________.
| A．have some good food |
| B．enjoy their work |
| C．exercise regularly |
| D．discover fatigue toxins |
Cyril was a small town. The houses there were all made of wood; almost everything in the houses such as cupboards, tables and chairs were made of wood, too. And all the houses faced south. The town was never peaceful. Fire broke out once a week on summer afternoons. Residents were puzzled who the real firebug(纵火犯) was.
One day a big fire broke out. It was said that a Negro had jumped out of the house on fire, so the police arrested(逮捕) all the Negroes in the street. However, fire never stopped to breaking out when the Negroes were in prison.
Mauson, a physics teacher didn’t believe that the Negroes were the firebugs, for he really knew about those Negroes, He made up his mind to find out who the real firebug was.
One day he was invited to drink in a pub and happened to notice that many bottles and plastic plates were baked by the hot sunrays. Suddenly he realized what the actual fact was. He jumped with joy, saying, “I’ve got the answer!”
Mauson dashed out of the pub to his friend’s house nearby, which also faced south. He made an experiment there to confirm his idea.
The next Saturday afternoon, Mauson asked some policemen and newsmen to come to the house. They were told that the real firebug would be shown there. At that time the sun was shining full into the house and it became hotter and hotter inside the room.
Someone wanted to draw the curtains together, while another was going to use a bottle to drink water, but neither got permission from Mauson, who wanted to let the firebug in.
“Now,” said Mauson, “this house will soon catch fire.” People looked at each other in surprise. Mauson asked them to look at the bottles and focus on the table cloth. After a while the cloth gave off a burning smell and began to catch fire!
The mystery of fire was discovered, but the police wouldn’t believe him and insisted that Negroes had been the firebugs. Instead they arrested Mauson and put him into prison. But Mauson said he would never turn against science.
The town was never peaceful, for fire broke out .
| A．in the afternoon | B．in summer | C．at any time | D．A and B |
Why did the police arrest all the Negroes?
| A．One of them had jumped out of the home on fire. |
| B．They were suspected to be the firebugs. |
| C．The police hated the Negroes. |
| D．The Negroes knew something about the fires. |
Drinking in a pub, Mauson realized what the actual fact was .
| A．by experiment | B．by backing the bottles |
| C．through the hot sunrays | D．by accident |
By making an experiment, they knew the real firebug was .
| A．the Negroes | B．bottles | C．sunrays | D．plastic plates |
Mauson was put into prison, because .
| A．he had told a lie |
| B．he had fund out the real firebug |
| C．he had turned against science |
| D．he had made friends with the Negroes |
Women in Nazi Germany were to have a very special job. Hitler was very clear about this. This job was that they should be good mothers bringing up children at home while their husbands worked. Except for some special fields, Hitler saw no reason why a woman should work. Within months of Hitler coming to power, many female doctors, teachers and lawyers were sacked. By the start of the Second World War, very few German women were in fulltime work. From their earliest years, girls were taught that all good German women married at a young age to a proper German and that the wife’s job was to keep a good home for her working husband and to have children.
One of the earliest laws passed by Hitler once he came to power in 1933, was the Law for the Encouragement of Marriage. This law stated (声明) that all newly married couples would get a government loan (贷款) of 1000 marks. This loan was not to be simply paid back. The birth of one child meant that 25% of the loan did not have to be paid back. Two children meant that 50% of the loan didn’t need to be paid back. Four children meant that the entire loan was cleared.
What was more, as housewives and mothers, their lives were controlled. Women were not expected to wear make-up or trousers. Only flat shoes were expected to be worn. Women were discouraged from slimming as this was considered bad for child birth.
The aim of the Law for the Encouragement of Marriage was to ________.
| A．attract more young people to join the army willingly |
| B．make those married couples become rich quickly |
| C．encourage people to loan more from the government |
| D．encourage couples to have as many children as they could |
The underlined word “sacked” in Paragraph one probably means “________”.
| A．punished | B．fired | C．killed | D．raised |
According to the passage, women in Nazi Germany ________.
| A．could make up or wear beautiful clothes |
| B．were to have children and do housework |
| C．could receive a good education at school |
| D．were offered the equal rights as men |
Which of the following is a suitable title for the text?
| A．The life of women in Nazi Germany |
| B．The cruel rule of Hitler in Germany |
| C．The marriage policy in Nazi Germany |
| D．Hitler — a powerful leader in Germany |
Exercise is an important part of a healthy life. It reduces your risk of heart attack and is a good way to control body weight. It is also something you can do with other people, which can be great fun. So, it is important to find time to exercise and be healthier. As well as making time to exercises, another way is to build it into the natural rhythm (节奏) of your day.
· Go for a walk on your lunch break.
Try to find at least three different ways and change them throughout the week. It
might even be possible to find a place to walk inside, for those bad weather days.
· Talk to your employers about improving health at work.
Encourage your workers to cycle to and from work. You might also be able to
encourage them to set up a gymnasium. Sell the idea by pointing out that doing so
will improve productivity (生产率), and make workers happy.
· If you are a student.
Go for walks with friends to talk about your studies. Spend some time in the learning
resource centre reading about sport, exercise and health. The more you know, the
more choices you will have about how to be physically active. Most colleges have
sport and exercise programs that students can take part in. Find out which activities
are being held, and try those you think you might enjoy.
Workers are advised to cycle to and from work to ________.
| A．make themselves realize the importance of health |
| B．work better and bring pleasure to themselves |
| C．make themselves become much stronger |
| D．reduce the time spent in walking to work |
When a student wants to do exercise at school, he or she had better ________.
| A．take part in all the exercise programs |
| B．have sports with friends or classmates |
| C．choose the one that he or she likes |
| D．choose the same one all the time |
We can learn from the passage that ________.
| A．walk is most suitable for those who work indoors |
| B．one who knows more about health will be healthier |
| C．exercising with others will be better for one’s health |
| D．combining exercise with daily work can save time to keep healthy |
An early invention by Albert Einstein has been rebuilt by scientists at Oxford University. They are trying to develop an environmentally friendly refrigerator that runs without electricity.
We all know that modern fridges cause damage to the environment. They work by using a kind of man-made greenhouse gas called Freon (氟里昂), which is far more damaging than carbon dioxide.
Now Malcolm McCulloch, an electrical engineer at Oxford, is leading a three-year project to develop appliances that can be used in places without electricity.
His team has completed a prototype (样机) of a fridge patented in 1930 by Einstein. It used only pressurized gases to keep things cold. The design was partly used in the first refrigerators, but the technology was dropped when more efficient compressors (压缩机) became popular in the 1950s. That meant a switch to using Freon.
Einstein's idea uses butane (丁烷) and water and takes advantage of the fact that liquids boil at lower temperatures, when the air pressure around them is lower.
"If you go to the top of Mount Qomolangma, water boils at a much lower temperature than it does when you're at sea level and that's because the pressure is much lower up there," said McCulloch.At one side is the evaporator (蒸发器), a bottle that contains liquid butane. "If you introduce a new vapor above the butane, the liquid boiling temperature decreases and, as it boils off, it takes energy from the surroundings to do so," says McCulloch. "That's what makes it cold."
The gas fridges based on Einstein's design were replaced by Freon-compressor fridges partly because Einstein's design was not very efficient. But McCulloch thinks that by changing the design and replacing the types of gases used it will be possible to quadruple (翻两番) the efficiency.
However, McCulloch's fridge is still in its early stages. "It's very much a prototype," he said. "Give us another month and we'll have it working."． According to the passage, an early invention by Albert Einstein _______.
| A．has been rediscovered because it costs much less and works more efficiently |
| B．is being redesigned because it could be used in places without electricity |
| C．has just been found to be energy-saving and environmentally friendly |
| D．will be fully made use of and become the fridge of the future |
．Which of the following is TRUE according to the text?
| A．Freon was used in fridges long before the 1950s. |
| B．Freon is what makes current fridges big polluters. |
| C．McCulloch thinks he could improve Einstein's design by using other types of vapors. |
| D．The fridge Malcolm McCulloch and his team designed will be put into production soon. |
．We can learn from the text that the prototype completed _______.
| A．changed the air pressure around it |
| B．was tested on the top of Mount Everest |
| C．increased the liquid boiling temperature |
| D．used only pressurized gases to keep things cold |
．McCulloch's words in Paragraph 6 _____.
| A．serve as an explanation for the principle behind Einstein's fridge |
| B．give you the reason why Einstein's fridge was not efficient |
| C．tell you how to take advantage of low air pressure |
| D．show you how Einstein's fridge works |
A latest national survey has found that over half of China's netizens are suffering from various mental problems although some 62 percent of them claim at the same time that they are happy on the whole anyway.
This is the result of China's first White Paper on Netizens' Health Conditions issued on Wednesday by 39.net, China's largest authoritative website on health sciences. It is the first most comprehensive health survey on netizens' health situation ever conducted in China in ten years' time. The white paper came out after two months of online and offline research that involved over 150 thousand netizens, covering topics and questions on health knowledge, mental situation, sense of health, and living habits.
According to the white paper, more than 70 percent of China's netizens say they are suffering from mental problems such as bad memory, anxiety, depression, and a lack of confidence. And a similar 72 percent of them also say they are often suffering from diseases like insomnia, dizziness, joint degeneration and achings. Meanwhile, another 53 percent of netizens believe that white collar employees who have bigger work pressures are more likely to catch mental problems.
The white paper adds, doing almost no sports and spending long time surfing online lead to the above mentioned health problems among netizens. Only 9 percent of netizens take up sports on weekends while over 40 percent stay home, surfing. And only 16 percent netizens can assure more than eight hours' sleeping daily.
At present, China has a netizen population of 162 million, with a monthly consumption of 186 yuan, or about 25 dollars, on Internet surfing. The national survey on netizens' health situation ________.
| A．was conducted by sohu.com | B．is conducted every year |
| C．was carried out online and offline | D．covered about half a million netizens |
. Which of the following has the closest meaning to the underlined part "white collar"?
| A．White clothes. | B．White offices. | C．Office workers. | D．White people. |
. All the following factors have been mentioned to cause the health problems among netizens EXCEPT ________.
| A．doing no sports | B．spending long time online |
| C．heavy work pressures | D．shopping online |
.What’s the main idea of the passage?
| A．China has a large netizen population. |
| B．Many netizens in China have mental problems. |
| C．The Internet has a negative influence on people. |
| D．How to surf the Internet safely and healthily. |