EVERYONE has those nights – you lie in your bed for hours, tossing and turning, totally unable to fall asleep. You wish you could just turn your brain off as if it were a light. That would make things much easier, wouldn’t it?
Now it looks like you are one step closer to this wild dream of yours – scientists from Oxford University, UK have just discovered the “switch” that tells the brain to go to sleep, reported Forbes.
To understand the study, you first need to know that there are two mechanisms (机能) that regulate sleep. There’s one that we’re already familiar with – our body clock, which works in a 24-hour cycle based on the light changes throughout the day.
The other one is what scientists call the sleep “homeostat (动态平衡系统)”. This mechanism has nothing to do with daylight. Instead, it keeps track of the brain’s waking hours and urges it to rest if it has been awake for a long time. “It is similar to the thermostat (自动调温器) in your home. A thermostat measures temperature and switches on the heating if it’s too cold,” Professor Gero Miesenböck, who led the study, told The Telegraph.
Our bodies use both of the mechanisms to regulate sleep. “The body clock says it’s the right time, and the sleep thermostat has built up pressure during a long waking day,” explained Miesenböck.
There is no way that scientists can trick the body clock. But with the sleep homeostat, there might be something they can do.
The researchers found that the sleep homeostat works by activating a specific group of nerve cells, or neurons, in the brain. They tested their theory on fruit flies by removing the neurons from the insects’ brains. And as expected, they found that the flies without the homeostat neurons did not keep a regular sleep pattern anymore.
Now that scientists have pinpointed (定位) the exact place in the brain – or, the “switch” – that regulates sleep, they can begin investigating (研究) how to activate these cells at any given time so that people can be sent to sleep instantly.
More importantly, figuring out how sleep mechanisms work may also help us to one day unravel one of the oldest mysteries of all: why do we need to sleep in the first place?
What is the article mainly about?
| A．A new way to treat sleep disorders. |
| B．The discovery of the sleep “homeostat”. |
| C．Advice on what to do when you fail to fall asleep. |
| D．A comparison of the two mechanisms that regulate sleep. |
How does the author explain the function of the sleep homeostat?
| A．Through examples. |
| B．With comparisons. |
| C．Through cause and effect analysis. |
| D．By presenting research findings. |
What can we conclude from the article?
| A．Generally, the sleep homeostat has less effect on people during the day than at night. |
| B．There is little scientists can do to affect the way the sleep homeostat works. |
| C．What makes us go to sleep at night is probably a combination of the two mechanisms. |
| D．The more homeostat neurons there are in one’s brain, the more easily one can fall asleep. |
The underlined word “unravel” in the last paragraph is closest in meaning to ______.
| A．put up with | B．figure out | C．keep track of | D．take notice of |
Most people say “yes” much more readily than “no”.
A friend is moving house this weekend and would like some help, and you agree. But, what you really wanted was a couple of quiet days relaxing at home. Or a roommate spends the entire weekends playing video games and wants to borrow your homework for “reference”. But, you’ve just finished it after taking a whole day to work hard.
Many people say “yes” to these kinds of requests. They tend not to consider their own interests and feelings, and are often angry with themselves afterwards.
Saying “no” requires courage and considerable practice, in fact, according to psychologists.
“Everyone wants to be liked,” says Gabriele Steinki, a German psychologist. “Saying ‘no’ risks losing the affection of the person asking the favor or even a job.”
The result is that many people say “yes” just for keeping the peace. But experts say this is regrettable. Anyone should have the right to say “no”.
In fact, rejecting a request can even help to strengthen a relationship because it expresses a true feeling.
But, for people used to agreeing to every request, changing can be a long and uncomfortable learning process.
Most people believe that “If I say ‘no’, I’ll lose the affection of the person. But the affection is important to me.” This way of thinking can be replaced by this: “If he only likes me because I always do what suits him , then the price of his affection is too high in the long term.”
Steinki says the key is talking to the other person to find a mutual (相互的) solution. “One needs to present the situation from one’s own point of view, and to suggest how the situation can be dealt with to the advantage of both parties. The other person must have the feeling that his interests are being considered.”
When the refusal is not accepted, Steinki advises giving the reasons calmly again until the person gets the message.Most people say “yes” much more readily than “no” because ________.
| A．they don’t care about their own interests and feelings |
| B．they don’t know they will regret afterwards |
| C．they have already been used to saying “yes” |
| D．they care more about others’ affection |
In the opinion of experts, _________ .
| A．people need a lot of practice to say “no” |
| B．people should say “yes” to keep the peace |
| C．saying “no” means losing a job |
| D．people have the right to be liked |
According to the writer, what should you do if you want to refuse the other person’s request?
| A．Just say you can’t help him. |
| B．Say sorry to him. |
| C．Refuse him clearly. |
| D．Talk to the other person to find a mutual way. |
According to the writer, what should you do if your refusal is not accepted?
| A．Say yes to him. |
| B．Repeat your reason for his acceptance |
| C．Just go away |
| D．Say no to him |
What is the best title of the passage?
| A．You Need Courage To Say “No” |
| B．“Yes” More Than “No” |
| C．Nobody Has the Right To Say “No” |
| D．It’s Easy To Say “Yes” |
Success is often measured by the ability to overcome adversity（逆境）. But it is often the belief of others that gives us the courage to try.
J. K. Rowling, author of the Harry Potter book series, began writing at age 6. In her biography（传记）, she remembers with great fondness when her good friend-Sean became the first person to encourage her and help her build the confidence that one day she would be a very good writer.
“He was the first person with whom I really discussed my serious ambition（志向） to be a writer. He was also the only person who thought I was bound to（注定）be a success at it, which meant much more to me than I ever told him at the time.”
Though there were many difficulties, Rowling continued her writing, particularly fantasy stories. But it wasn’t until l990 that she first came up with the idea about Harry Potter. As she recalls（回忆）, it was on a long train journey from London to Manchester that “the idea of Harry Potter simply fell into my head. To my great disappointment, I didn’t have a pen with me, and I was too shy to ask anybody if I could borrow one. I think, now, that this was probably a good thing, because I simply sat and thought, for four (delayed train) hours, and all the details came up in my brain, and this thin, black-haired, bespectacled（戴眼镜的）boy who didn't know he was a wizard became more and more real to me.”
That same year, her mother died after a ten-year fight with serious diseases, which deeply affected her writing. She went on to marry and had a daughter, but separated from her husband shortly afterwards.
During this time, Rowling was diagnosed with depression（诊断患有抑郁症）. Unemployed, she finished her first novel in area cafes, where she could get her daughter to fall asleep. After being refused by l2 publishing houses, the first Harry Potter novel was sold to a small British publishing house.
Now with seven books that have sold nearly 400 million copies in 64 languages, J. K. Rowling is the highest earning novelist in history. And it all began with her friend’s encouragement as well as her ambition to write. Who believed J. K. Rowling was to be a good writer?
| A．Her friend Sean. | B．Her mother. |
| C．Her daughter. | D．Her husband. |
Rowling first came up with the idea about Harry Potter________.
| A．at the age of 6 | B．on a train journey |
| C．after her mother’s death | D．in her secondary school |
She felt disappointed on the train because_________.
| A．her train was delayed for four hours |
| B．she didn’t have a pen with her |
| C．her mind suddenly went blank |
| D．no one would offer her help |
It can be concluded from Paragraph 5 and 6 that Rowling is_________.
| A．open-minded | B．warm-hearted |
| C．good-natured | D．strong-willed |
The text mainly tells us_________.
| A．adversity makes a good novelist |
| B．the courage to try is a special ability |
| C．you can have a wonderful idea everywhere |
| D．encouragement helps one succeed |
This is a true story from Guyana．One day, a boy took a piece of paper from a box．He made a paper ball and pushed it into his nose．He couldn’t get it out．He ran crying to his mother．His mother couldn’t get the paper out, either．A week later, the paper was still in the boy’s nose．His nose began to have a bad smell．
So his mother took the boy to a hospital．The doctor looked up at the child’s nose, but she couldn’t get the paper out．She said she had to cut the boy’s nose to get the paper out．
The boy’s mother came home looking sad．She didn’t want her child to have his nose cut．The next day she took the boy to her friend Sidney who lived in a house with an old lady called May．May wanted to see the child, so the child let her look up his nose．
“Yes, I can see it,” May said．“It will be out soon.”
As she spoke, she shook some black pepper on the child’s nose．The child gave a mighty（强而有力的） sneeze and the paper flew out．His mother was surprised．May told his mother to take the boy to the seaside for a swim, for the salt water would go up his nose and stop the bad smell．
So the lucky boy didn’t have to go to the hospital to have his nose cut．After the boy pushed a paper ball into his nose, ____．
| A．he took it out |
| B．his mother took it out |
| C．he tried to take it out but failed |
| D．he did nothing but cry |
Which of the following is TRUE?
| A．The doctor helped to take the paper ball out of the boy’s nose． |
| B．The boy had to have his nose cut at last． |
| C．The boy’s mother found some black pepper to solve the problem． |
| D．May succeeded in taking the paper out． |
The boy should be taken to the seaside for a swim because ____．
| A．he needed to learn to swim. |
| B．the sea water would wash out the paper ball． |
| C．the sea water would stop the bad smell of his nose． |
| D．he needed a rest. |
The paper ball stayed in the boy’s nose for ________.
| A．at most seven days | B．less than seven days |
| C．more than seven days | D．exactly seven days |
According to the story,______was most worried about the boy’s accident.
| A．the boy’s mother | B．Sidney |
| C．May | D．the doctor |
We can achieve knowledge either actively or passively（被动地）. We achieve it actively by direct experience, by testing and proving an idea, or by reasoning.
We achieve knowledge passively by being told by someone else. Most of the learning that takes place in the classroom and the kind that happens when we watch TV or read newspapers or magazines is passive. Conditioned as we are to passive learning, it’s not surprising that we depend on it in our everyday communication with friends and co-workers.
Unfortunately, passive learning has a serious problem. It makes us tend to accept what we are told even when it is little more than hearsay and rumor(谣言).
Did you ever play the game Rumor? It begins when one person writes down a message but doesn’t show it to anyone. Then the person whispers it, word for word, to another person. That person, in turn, whispers it to still another, and so on, through all the people playing the game. The last person writes down the message word for word as he or she hears it. Then the two written statements are compared. Typically, the original message has changed.
That’s what happens in daily life. The simple fact that people repeat a story in their own words changes the story. Then, too, most people listen imperfectly. And many enjoy adding their own creative touch to a story, trying to improve on it, stamping（打上标记）it with their own personal style. Yet those who hear it think they know.
This process is also found among scholars and authors: A statement of opinion by one writer may be re-stated as fact by another, who may in turn be quoted by yet another; and this process may continue, unless it occurs to someone to question the facts on which the original writer based his opinion or to challenge the interpretation he placed upon those facts.According to the passage, passive learning may occur in _______.
| A．doing a medical experiment |
| B．solving a math problem |
| C．visiting an exhibition |
| D．doing scientific reasoning |
The underlined word “it” in Paragraph 2 refers to _____.
| A．active learning | B．knowledge |
| C．communication | D．passive learning |
What can we infer from the passage?
| A．Active learning is less important. |
| B．Passive learning may not be reliable. |
| C．Active learning occurs more frequently. |
| D．Passive learning is not found among scholars. |
Sports shoes that work out whether their owner has enough exercise to warrant time in front of the television have been devised in the UK.
The shoes — named Square Eyes — contain an electronic pressure sensor and a tiny computer chip to record how many steps the wearer has taken in a day. A wireless transmitter passes the information to a receiver connected to a television, and this decides how much evening viewing time the wearer deserves, based on the day’s efforts.
The design was inspired by a desire to fight against the rapidly ballooning waistlines among British teenagers, says Gillian Swan, who developed Square Eyes as a final year design project at Brunel University to London, UK. “We looked at current issues and childhood overweight really stood out,” she says. “And I wanted to tackle that with my design.”
Once a child has used up their daily allowance gained through exercise, the television automatically switches off. And further time in front of the TV can only be earned through more steps.
Swan calculated how exercise should translate to television time using the recommended daily amounts of both. Health experts suggest that a child take 12,000 steps each day and watch no more than two hours of television. So, every 100 steps recorded by the Square Eyes shoes equals precisely one minute of TV time.
Existing pedometers （计步器） normally clip onto a belt or slip into a pocket and keep count of steps by measuring sudden movement. Swan says these can be easily tricked into recording steps through shaking. But her shoe has been built to be harder for lazy teenagers to cheat. “It is possible, but it would be a lot of effort,” she says. “That was one of my main design considerations.”According to Swan, the purpose of her design project is to ________.
| A．keep a record of the steps of the wearer |
| B．deal with overweight among teenagers |
| C．enable children to resist the temptation of TV |
| D．prevent children from being tricked by TV programs |
Which of the following is TRUE of Square Eyes shoes?
| A．They regulate a child’s evening TV viewing time. |
| B．They determine a child’s daily pocket money. |
| C．They have raised the hot issue of overweight. |
| D．They contain information of the receiver. |
What is stressed by health experts in their suggestion?
| A．The exact number of steps to be taken. |
| B．The precise number of hours spent on TV. |
| C．The proper amount of daily exercise and TV time. |
| D．The way of changing steps into TV watching time. |
Which of the following would be the best title for the text?
| A．Smart Shoes Decide on Television Time |
| B．Smart Shoes Guarantee More Exercise |
| C．Smart Shoes Measure Time of Exercise |
| D．Smart Shoes Stop Childhood Overweight |