题干

   Darek Fidyka, a 38-year-old Bulgarian, had been paralysed(瘫痪的)from the chest down for four years after a knife attack. Scientists from Britain and Poland took cells from his nose, transplanted them into his back and regrew his spinal cord (脊髓). Now he can walk and even drive a car. The doctors were delighted but said it was the first step in a long journey.

The breakthrough came after 40 years of research by Professor Geoff Raisman, who found that cells had the possibility to repair damage to nasal (鼻子的) nerves, the only part of the nervous system that constantly regrows. “The idea was to take something from an area where the nervous system can repair itself, and put it into an area that doesn't repair itself,” Professor Raisman said.

Polish doctors injected the nasal cells into Mr Fidyka's spinal cord above and below the injury and used some nerves from his ankle to form a bridge across the damaged tissue. The nasal cells appear to have caused the spinal nerves to repair themselves.

Professor Raisman achieved this with rats in the late 1990s, but this is his greatest success. “I think the moment of discovery for me was Christmas in 1997 when I first saw a rat that couldn't control its hand put its hand out to me. That was an exciting moment, because I realized then that my belief that the nervous system could be repaired was true. ”

Doctors chose the easiest case for their first attempt — it might not work for others. But there is a real sense of hope that an idea once thought impossible has been realized.

David Nicholls, who helped provide money for the breakthrough, said information about the breakthrough would be made available to researchers across the globe.

“What you’ve got to understand is that for three million paralysed people in the world today, the world looks like a totally brighter place than it did yesterday,” he said.

【小题1】Why did Professor Geoff Raisman choose cells from the nose?
A.The nervous system in the nose can repair itself.
B.Cells in the nose can be easily transplanted.
C.Cells in the nose reproduce rapidly.
D.He just wanted to give it a try.
【小题2】Why did the operation work for Darek Fidyka?
A.The nasal cells reproduced and spread quickly.
B.The nerves from his ankle cured the injury.
C.The nervous system in the spinal cord can repair itself.
D.The nasal cells helped the spinal nerves to repair themselves.
【小题3】What made Professor Geoff Raisman believe the nervous system can be repaired?
A.His study on animals.
B.His operation on a paralysed patient.
C.His sudden thoughts about Christmas.
D.His unusual experience with a sick rat.
【小题4】David Nicholls' words suggest that ________.
A.the world is becoming better and brighter
B.paralysed people have the hope of recovery
C.the report of the breakthrough will be published soon
D.researchers across the globe will carry out the operation immediately
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同类题1

   You probably have a first-aid kit at home for your family—but what about your family pets?You need to be ready if your furry friend faces an emergency at home. What's more,as the weather gets warmer,more pet owners take their pets with them when they leave the house—on vacation,to the park,jogging,hiking and even swimming. That can be fun for you and your pet,but there's a chance that your pet will get hurt there,as well. So,it's important to know some of the basics of first aid for your pet if necessary.

If your pet is exposed to long periods of heat and sunlight,she will be easy to get heat exhaustion(衰竭)or heatstroke. Signs of heat exhaustion are breathless,anxiousness,dry gums and red skin most easily seen on the ears.

If either of these occurs,cool the pet right away and,as always,get her to the vet(兽医).Put the animal in a shaded or air-conditioned area,and wet the body with cool water. Rubbing isopropyl alcohol(异丙醇)on the belly and fanning the area will help drive away the heat. If a pet is suffering from heatstroke,don't try to give her water. Get her to the vet immediately.

If you see an animal that's been hit by a car,or you hit one accidentally,first be cautious of all oncoming traffic before trying to reach the animal. Approach carefully. Even a severely injured animal can bite you.

As someone helps with directing traffic, cover the animal with a blanket or towel. If the animal cannot stand on her own, there's a good chance that there are neck, back or head injuries, so try to gently transfer the animal to a flat surface. Then transport that flat surface to the nearest vet. Picking up or hand-carrying the animal may worsen the injuries.

【小题1】What is the main idea of the first paragraph?
A.It is dangerous to keep pets outside.
B.It is necessary to prepare for pets' first aid.
C.It is fun to bring pets while you go out.
D.It is possible for pets to run away from home.
【小题2】If a pet suffers from heatstroke, what should you do?
A.Wet her body with cold water.
B.Make her drink some alcohol.
C.Bring her to the vet at once.
D.Freeze her in an air-conditioned area.
【小题3】How can you help an animal injured in an accident?
A.By running to help her immediately.
B.By carrying her in your hands to the vet.
C.By picking her up in a gentle way.
D.By sending her to the vet on a flat surface.
【小题4】The underlined word "transfer" in the last paragraph may mean" ________ ".
A.moveB.trap
C.feedD.drive

同类题3

Internet use appears to cause a decline in psychological well-being(安康), according to research at Carnegie Mellon University.
Even people who spent just a few hours a week on the Internet experienced more depression and loneliness than those who logged on less frequently, the two-year study showed. And it wasn’t that people who were already feeling bad spent more time on the Internet, but that using the Net actually appeared to cause the bad feeling.
Researchers are puzzling over the results, which were completely contrary to their expectations. They expected that the net would prove socially healthier than television, since the Net allows users to choose their information and to communicate with others.
The fact that Internet use reduces time available for family and friends may account for the drop in well-being, researchers suggested. Faceless, bodiless “virtual”(虚拟的)communication may be less psychologically satisfying than actual conversation, and the relationship formed through it may be shallower. Another possibility is that exposure to the wider world via the Net makes users less satisfied with their lives.
“But it’s important to remember this is not about the technology  per se; it’s about how it is used,” says psychologist Christine Riley of Intel, one of the study’s sponsors. “It really points to the need for considering social effects in terms of how you design applications and services for technology.”
【小题1】The best title for this passage would be ________.
A.Internet may Cause Depression
B.The Dark Side of Internet
C.How to Use Technology Properly
D.The Importance of Psychological Well-being
【小题2】Internet use may cause a decline in psychological well-being because ________.
A.people who were already feeling bad spend more time on the Internet
B.Internet users thought the world was wider than it really was
C.people were too eager to turn the “virtual” communication into reality
D.people have less time for actual communication with their family and friends
【小题3】What does the underlined Latin word “per se” (in Para. 5) mean?
A.probablyB.absolutely
C.oneselfD.itself
【小题4】What’s the tone of the passage?
A.Optimistic.B.Critical.
C.Objective.D.Pessimistic.

同类题4

   In the United States alone,over 100 million cell-phones are thrown away each year.Cell-phones are part of a growing mountain of electronic waste like computers and personal digital assistants.The electronic waste stream is increasing three times taster than traditional garbage as a whole.

Electronic devices contain valuable metals such as gold and silver.A Swiss study reported that while the weight of electronic goods represented by precious metals was relatively small in comparison to total waste,the concentration(含量)of gold and other precious metals was higher in So-called e-waste than in naturally occurring minerals.

Electronic wastes also contain many poisonous metals.Even when the machines are recycled and the harmful metals removed,the recycling process often is carried out in poor countries,in practically uncontrolled ways which allow many poisonous substances to escape into the environment.

Creating products out of raw materials creates much more waste material,up to 100 times more,than the material contained in the finished products.Consider again the cell-phone,and imagine the mines that produced those metals,the factories needed to make the box and packaging(包装)it came in.Many wastes produced in the producing process are harmful as well.

The U.S Environmental Protection Agency notes that most waste is dangerous in that"the production, distribution,and use of products-as well as management of the resulting waste-all result in greenhouse gas release." Individuals can reduce their contribution by creating less waste at the start-for instance,buying reusable products and recycling.

In many countries the concept of extended producer responsibility is being considered or has been put in place as an incentive(动机)for reducing waste.If producers are required to take back packaging they use to sell their products,would they reduce the packaging in the first place?

Governments' incentive to require producers to take responsibility for the packaging they produce is usually based on money.Why,they ask,should cities or towns be responsible for paying to deal with the bubble wrap(气泡垫)that encased your television?

From the governments' point of view,a primary goal of laws requiring extended producer responsibility is to transfer both the costs and the physical responsibility of waste management from the government and tax-payers back to the producers.

【小题1】By mentioning the Swiss study,the author intends to tell us that .
A.the weight of e-goods is rather small
B.natural minerals contain more precious metals
C.E-waste deserves to be made good use of
D.the percentage of precious metals is heavy in e-waste
【小题2】The responsibility of c-waste treatment should be extended .
A.from producers to governments
B.from governments to producers
C.from individuals to distributors
D.from distributors to governments
【小题3】What docs the passage mainly talk about?
A.The increase in e-waste.B.The creation of e-waste.
C.The seriousness of e-waste.D.The management of e-waste.

同类题5

   Cellphones, tablets, and computers are keeping children and teenagers awake at night-even when they' re not in use, according to new research. A study published on Monday in JAMA Pediatrics says that media devices are causing kids to sleep less and reducing the quality of sleep that they get. This leads to trouble of staying awake the next day.

Researchers analyzed hundreds of studies of children and teens aged 6-19. The scientists found a strong and consistent association between the use of technology at bedtime and poor sleeping. The reason is not just that kids are staying up too late with their devices. Using a computer can overstimulate the mind and emotions, the researchers say. A smartphone or tablet also gives off a light that affects the body's natural timing. These factors contribute to poor quality sleep. And many kids could be at risk. According to the study,72% of all children and 89% of adolescents have at least one device in their sleep environment. Most of these devices are used near bedtime.

"The harmful association between screen-based devices and kids' sleep is a major public health concern," the study concludes. In their conclusion, the researchers urge parents to understand the damaging influence of device use before sleep.

【小题1】What do the researchers disagree with?
A.Children even in dreams can be influenced by media devices.
B.Most adolescents like to play media devices before sleep.
C.Using media devices on bed makes kids sleep difficultly.
D.Using media devices can not excite the mind and emotions.
【小题2】How does a smartphone affect a child's sleep?
A.By making noises.
B.By giving off a light.
C.By attracting a kid's attention.
D.By sending out electronic waves.
【小题3】What can we learn from the second paragraph?
A.Media devices anytime put kids in danger.
B.Adolescents are more easily affected than children by phones.
C.Using technology at bedtime causes poor sleeping.
D.Media devices affect kid's performance at school.
【小题4】Whom does this article most probably writes to?
A.Scientists.B.Parents.
C.Children.D.Producers.