Scientists in UK have grown a living human "brain". The team at Aston University created tiny bunch of cells which act like a mini nervous system.
They believe it could help find a cure for worse mental conditions like Parkinson’s disease. Professor Michael Coleman is leading the research program. He explained, "We are aiming to be able to study the human brain at the most basic level, using an actual living human cell system. Cells have to be alive and operating efficiently to enable us to really understand how the brain works. "The experiment involves changing cells from a cancer tumour (肿瘤）and making them behave like brain cells.
Although far from finished, researchers hope the false brain cells will give them a greater understanding of how real brains work. This, in turn, could significantly further research into conditions which affect the brain. Neil Hunt, chief leader of the research group, said, "It is still very early days, but in the future the research could lead to a useful tool for looking into dementia (痴呆)."
The technique could also provide a way to carry on animal test and is being supported by the Humane Research Trust (HRT). The scientists predict that over the next ten years a million people will develop dementia. Professor Coleman believes their findings could change this. He said，"We hope our research will provide scientists with a new and highly relational human experimental model to help them understand the brain better and develop new drugs to control the related disease. However, the biggest challenge at present is that we are greatly short of fund, which will slow our research."UK scientists grow a living human "brain" in order to ______.
| A．study the structure of human brain |
| B．make use of living human cell system |
| C．discover how human brain really works |
| D．separate cells from a cancer tumour |
According to Neil Hunt, research into brain cells ______.
| A．will get finished as early as possible |
| B．will make people discover dementia |
| C．will affect the brain growth in many ways |
| D．will help to treat some diseases in nerve system |
From the last paragraph，we can know that ______
| A．the technique provided by HRT is immature |
| B．animal tests are no longer allowed by law |
| C．a million people suffer from brain diseases |
| D．the research program lacks financial support |
The text is intended to ______.
| A．tell us about a breakthrough in medical research |
| B．introduce a research program in human's brain |
| C．introduce the progress of drugs for dementia |
| D．tell us about health problem in nerve system |
C
The spread of Western eating habits around the world is bad for human health and the environment. Those findings come from a new report in the journal Nature.
There are ways to solve this diet-health-environment problem. But they will require a change in eating habits. And what we eat can be a product of culture, personal taste, price and ease.
David Tilman , a professor of ecology, examined information from 100 countries to identify what people ate and how diet affected health and found as nations industrialized, population increased and earnings rose, more people began to adopt what has been called the Western diet.
The Western diet is high in refined or processed sugar, fat, oil and meat. By eating these foods, people began to get fatter -- and sicker.
David Tillman says overweight people are at greater risk for non-infectious diseases like diabetes, heart disease and some cancers.
Unfortunately when people become industrialized, if they adopt this Western diet, they are going to have these same health impacts, and in some cases if you are Asian, you have them more seriously than what happens in the West."
China, he says, is an example where the number of diabetes cases has jumped. And that’s happening all across the world, in Mexico, Nigeria and so on.
A diet bad for human beings is also bad for the environment. As the world's population grows, experts say more forests will become farmland for crops or grasslands for grazing cattle.
"We are likely to have more greenhouse gas released in the future from agriculture because of this dietary shift than all the greenhouse gas that comes out of cars, airplanes, boats and ships. So our change in diet is likely to be worse for the world for climate warming than all the transportation sources we use right now."
He says one possible solution is leaving the Western diet behind.What is the main idea of the passage?
| A．The advantage of the Western diet |
| B．The disadvantage of the Western diet. |
| C．The diseases caused by the Western diet. |
| D．The popularity of the Western diet. |
Why do more and more people eat Western diet?
| A．Because Western diet is good for health. |
| B．Because people have more money. |
| C．Because Western diet is cheaper. |
| D．Because Western diet can make people thin. |
According to the passage, what is good for our environment?
| A．Giving up the Western diet. |
| B．Returning to Chinese diet. |
| C．Growing more crops |
| D．Raising more cattle. |
In which section of a newspaper can you find this passage?
| A．Science and Technology. |
| B．Education and Culture. |
| C．Environment and Health. |
| D．Agriculture and Climate. |
Which statement is true?
| A．The Western diet has little effect on Asians . |
| B．The China diet is rich in fat and oil. |
| C．Leaving the Western diet behind is easy for people. |
| D．More forests will become farmland as the world's population grows . |
B
Ceaseless technology. A punishing workweek. That to –do list that keeps multiplying. It is no wonder many of us find it difficult to have a sufficient amount of sleep. But will sleeping more on the weekend make up for hours of lost snoozing (小睡)? One sleep expert, W. Christopher Winter raised the question.
Sleeping binge
Getting eight hours of shut-eye each night is generally recommended, but many people don’t. As the week rolls from Monday to Friday, they accumulate a sleep debt. Spending a few extra hours in bed on a Saturday morning, people assume, will help them “ catch up” on lost sleep. They’re likely right, “ Nobody knows how long the horizon is, probably a few nights, but studies show that recovery sleep in the short term does work,” says Dr. Winter, a member of the American Academy of Sleep Medicine.
Sleep banking
Recent data suggests that banking sleep in advance of a long night can actually offset (补偿) upcoming sleep deprivation. If you knew you were going to have to stay up all night on a particular day, for example, you could sleep for 10 hours a day for multiple days before the event, and be fine, Dr. Winter says. Just plan ahead.
Routine naps
A scheduled nap is healthier than catching up on or banking sleep. “ Because sleep extension can make you feel groggy (昏昏沉沉), I always recommend a short nap (if a person feels they need it ), at the same time, every day,” says Dr. Winter. He adds that 25 minutes is ideal. “ When you schedule a short nap, your body anticipates it and slows down, without falling into a deep dream sleep,” he says. That refreshing, scheduled break is better than an occasional weekend lie-in. “ The body likes routine,” he says, “ When it’s prepared, it works more efficiently.”What is the topic of this passage?
| A．The bad effect of lacking sleep. |
| B．Advantages of enough sleep. |
| C．Some knowledge about sleep. |
| D．The ways to get sound sleep. |
Why do people accumulate a sleep debt during the week?
| A．Because they have a tight weekday. |
| B．Because they watch TV late into night. |
| C．Because they have to look after children. |
| D．Because they want to catch up on lost sleep on weekend. |
Which is the recommended way to keep healthy ?
| A．Banking sleeping. |
| B．Catching up on lost sleep. |
| C．An occasional weekend lie-in. |
| D．Scheduled naps. |
what is the meaning of the underlined word “deprivation”.
| A．Increase. | B．Loss. | C．Time. | D．Problem. |
Which is right according to the passage?
| A．Most people always get 8-hour-sleep each night. |
| B．Recovery sleep can make a difference. |
| C．Everyone should have a short nap. |
| D．A nap won’t work as expected. |
阅读下列短文，从每题所给的A、B、C和D项中，选出最佳选项，并在答题卡上将该项涂黑。
A
Can you believe everything that you read? It seems as if every day, some new articles come out about a new discovery about this or that. For example, water is bad for you, or good for you. The answer depends on which scientific study has just come out. People cannot decide which food items are healthy, how pyramids were constructed, and why dinosaurs disappeared. When we look for answers we sometimes can believe persuasive researches and scientists. But how trustworthy are they really? Here are two examples of scientific hoaxes.
As far back as 1726, Johann Beringer was fooled by his fellow scientists into thinking he had made an amazing discovery. The fossils of spiders, lizards, and even birds with the name of God written on them in Hebrew were unlike anything that had been found before. He wrote several papers on them and was famous for those only to have it revealed that they were planted by jealous colleagues to ruin his reputation.
When an early human being was discovered in 1912, scientists at this time were wild with excitement over the meaning it had for the theory of evolution. There were hundreds of papers about this Piltdown man over the next fifty years until it was finally discovered to be a complex hoax. The skull (头骨) of a man had been mixed with the jawbone of an orangutan (猩猩) to make the ape (猿) man.
The next time you read the exciting new findings of a study of the best scientist, do not automatically assume that it is true. Even qualified people can get it wrong. While we certainly should not ignore scientific research, we do need to take it with a grain of salt. Just because it is accepted as the truth today does not mean it will still be trustworthy tomorrow.What is the main idea of the passage?
| A．Everything in the newspaper is doubtful. |
| B．People are encouraged to suspect everything. |
| C．Not everything you read is believable. |
| D．Sometimes scientists may make mistakes. |
What does the underlined word “ hoaxes” mean?
| A．Truths. | B．Tricks. |
| C．Researches. | D．Result. |
From the second paragraph we can know______.
| A．Johann Beringer was envied by his colleagues. |
| B．Johann Beringer lived in the seventeenth century. |
| C．Johann Beringer found the Piltdown man. |
| D．Johann Beringer found he was fooled by others in time. |
According to the passage ,the discovery of Piltdown man______.
| A．was significant to the theory of evolution. |
| B．proved orangutan developed from man. |
| C．didn’t prove false until 50 years later. |
| D．proved that scientists were very careless. |
From the last paragraph we can infer the author thinks_____.
| A．scientists are unreliable. |
| B．everyone can make a mistake. |
| C．we should ignore scientific research. |
| D．we should treat scientific research reasonably. |
D
Children whose mothers were exposed to higher levels of phthalates(酞酸盐), common chemicals in consumer products, in late pregnancy tend to score lower than other kids on intelligence tests at age seven, according to a new study.
Some soaps, nail polish, hairspray, shower curtains, raincoats, car interiors and dryer sheets contain phthalates, which are used as so-called plasticizers, or softening agents.
At present, the Food and Drug Administration does not have evidence that phthalates as used in cosmetics pose a safety risk, but six types of phthalates are currently banned from children’s toys.
Researchers followed 328 New York women in low-income communities from pregnancy until the child was seven years old. When the children were seven, they completed an intelligence test measuring four areas of mental functioning. The mothers’ levels of two of the phthalates - DnBP and DiBP - during pregnancy were associated with childhood intelligence: As phthalate levels went up, child IQ tended to go down.
“With observational studies, there is always the chance that the results may be in part explained by an unmeasured factor that we haven’t yet considered,” said Stephanie Engel, associate professor of epidemiology（流行病）from the University of North Carolina.
“I would characterize this study as thorough and high quality, and the results concerning,” said Engel, who was not involved in the work. “But there needs to be more research in this area before firm conclusions can be drawn.”
“Nevertheless, It is clear that there needs to be a serious discussion in the scientific and policy communities about whether the evidence is strong enough yet to warrant widespread policy changes, not just on the basis of this study, but also including a range of childhood health outcomes that have already been reported in the literature,” Engel said.
“Although there are no regulations on phthalate exposure during pregnancy, it would be wise for expectant mothers to avoid microwaving food in plastic, avoid scented products, and as much as possible store foods in glass instead of plastic,” she said.According to the passage, the new study is about ___________________________.
| A．the interaction between a pregnant woman and her unborn baby |
| B．how phthalates taken in by a pregnant woman affect her baby |
| C．why children’s IQ is different at the age of seven |
| D．the usage of common chemical in consumer products |
Which of the following statements is TRUE?
| A．Researchers chose 328 pregnant women at random to do the research |
| B．The FDA doesn’t think phthalates have any risks |
| C．There are two types of phthalates that may affect childhood intelligence |
| D．The researchers are very confident about their conclusions |
What can you learn from the last but one paragraph?
| A．The evidence is not strong enough to change the policy |
| B．The policy should be stricter |
| C．A serious discussion is needed based on this study |
| D．All studies about childhood health should be involved |
This passage has probably been taken from _________.
| A．a children’s book | B．a science report |
| C．a nutrition guidebook | D．a health notice board |
C
My mom has eyes in the back of her head. She also taught me from an early age to be suspicious of strange men, especially when they give you presents. One day, a “nice man” bearing flowers managed to steal 20 euros from her purse, while she was holding it in her hands. “He said he was collecting for a church charity so I pulled out a euro,” she explains, “He said ‘no, no, that’s too much’ and offered to look in my purse to find a smaller coin. He must have slid out that 20 euro note at the same time. I did not even notice until an hour later. I felt so stupid.”
According to neuroscientists, the key requirement for a successful pickpocket is not having nifty (熟练的) fingers, it’s having a working knowledge of the loopholes (漏洞) in our brain. The most important of these loopholes is the fact that our brains are not set up to multi-task. Most of the time that is a good thing — it allows us to filter (过滤) out all but the most important features of the world around us. But a good trickster can use it to against you. This kind of trick involves capturing all of somebody’s attention with other movements. Street pickpockets often use this effect to their advantage by manufacturing a situation that can not help but overload your attention system. Other strategies are more psychological. Pickpockets tend to hang out a “beware of pickpockets” sign, because the first thing people do when they read it is check they still have their valuables, helpfully giving away where they are. And in my mom’s case, the thief’s best trick was not coming across like a pickpocket. “He was a very nice guy and very confident. Not someone that would cause you to suspect,” she says. Apollo Robbins, a stage pickpocket, said smart move, like moving your hand in an arc motion rather than a straight line, is another popular strategy employed by tricksters.
At last, it should be pointed out that most thefts are opportunistic. The skill level of most thieves is far less than you think. But they are opportunistic enough to keep up with new technology.What does the underlined word “it” in paragraph 2 refer to?
| A．People’s brains are not designed to multi-task. |
| B．People’s brains can filter out all but the most important features. |
| C．Somebody’s attention can be distracted by a certain trick. |
| D．Somebody’s overload attention system. |
How did the pickpockets manage to cheat the mother ?
| A．He had such smart motion that she didn’t notice that. |
| B．He looked so reliable that she didn’t suspect him. |
| C．He made her focus her attention on what he said instead of being cheated . |
| D．All the above. |
In the author’s opinion, _________.
| A．people’s brains have many loopholes |
| B．thieves are more skillful than opportunistic |
| C．signs reminding people of pickpockets can play a negative role in protecting valuables |
| D．his mom’s losing money is nothing but a by-accident experience |
What will the author probably talk about next?
| A．Mom’s another suffering |
| B．Pickpockets concerning new technology |
| C．Pickpockets’ tricks |
| D．Apollo Robbins’ stage pickpockets |
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