Since the 1970s, scientists have been searching for ways to link the brain with computers. Brain-computer interface (BCI) technology could help people with disabilities send commands to machines.
Recently, two researchers, Jose Millan and Michele Tavella from the Federal Polytechnic School in Lausanne, Switzerland, demonstrated a small robotic wheelchair directed by a person's thoughts.
In the laboratory, Tavella operated the wheelchair just by thinking about moving his left or right hand. He could even talk as he watched the vehicle and guided it with his thoughts.
“Our brain has billions of nerve cells. These send signals through the spinal cord (脊髓) to the muscles to give us the ability to move. But spinal cord injuries or other conditions can prevent these weak electrical signals from reaching the muscles.” Tavella says. “Our system allows disabled people to communicate with external world and also to control devices.
The researchers designed a special cap for the user. This head cover picks up the signals from the scalp (头皮) and sends them to a computer. The computer interprets the signals and commands the motorized wheelchair. The wheelchair also has two cameras that identify objects in its path. They help the computer react to commands from the brain.
Prof. Millan, the team leader, says scientists keep improving the computer software that interprets brain signals and turns them into simple commands. “The practical possibilities that BCI technology offers to disabled people can be grouped in two categories: communication, and controlling devices. One example is this wheelchair.”
He says his team has set two goals. One is testing with real patients, so as to prove that this is a technology they can benefit from. And the other is to guarantee that they can use the technology over long periods of time.BCI is a technology that can ________.
| A．help the disabled to recover |
| B．control a person's thoughts |
| C．help to update computer systems |
| D．link the human brain with computers |
How did Tavella operate the wheelchair in the laboratory?
| A．By talking to the machine. |
| B．By controlling his muscles. |
| C．By using his mind. |
| D．By moving his hand. |
Which of the following would be the best title for the text?
| A．Robotic Vehicles Could Help to Cure Brain Injuries |
| B．BCI Could Mean More Freedom for the Disabled |
| C．New Findings About How the Human Brain Works |
| D．Switzerland, the BCI Research Center |
The morning had been a disaster. My tooth was aching. And I’d been in an argument with a friend. Her words still hurt: “The trouble with you is that you won’t put yourself in my place. Can’t you see things from my point of view?” I shook my head stubbornly—and felt the ache in my tooth. I’d thought I could hold out till my dentist came back from holiday, but the pain was really unbearable. I started calling the dentists in the phone book, but no one could see me immediately. Finally, at about lunchtime, I got lucky.
“If you come by right now,” the receptionist said, “the dentist will fit you in.”
I took my purse and keys and rushed to my car. But suddenly I began to doubt about the dentist. What kind of dentist would be so eager to treat someone at such short notice? Why wasn’t he as busy as the others?
In the dentist’s office, I sat down and looked around. I saw nothing but the bare walls and I became even more worried. The assistant noticed my nervousness and placed her warm hand over my ice-cold one.
When I told her my fears, she laughed and said, “Don’t worry. The dentist is very good.”
“How long do I have to wait for him?” I asked impatiently.
“Come on, he is coming. Just lie down and relax. And enjoy the artwork,” the assistant said.
“The artwork?” I was puzzled.
The chair went back. Suddenly I smiled. There was a beautiful picture, right where I could enjoy it: on the ceiling. How considerate the dentist was! At that moment, I began to understand what my friend meant by her words.
What a relief!Which of the following best describes the author’s feeling that morning?
| A．Cheerful. | B．Nervous. | C．Satisfied. | D．Upset. |
What made the author begin to doubt about the dentist?
| A．The dentist’s agreeing to treat her at very short notice. |
| B．The dentist’s being as busy as the other dentists. |
| C．The surroundings of the dentist’s office. |
| D．The laughing assistant of the dentist. |
Why did the author suddenly smile?
| A．Because the dentist came at last. |
| B．Because she saw a picture on the ceiling. |
| C．Because she could relax in the chair. |
| D．Because the assistant kept comforting her. |
What did the author learn from her experience most probably?
| A．Strike while the iron is hot. |
| B．Have a good word for one’s friend. |
| C．Put oneself in other’s shoes. |
| D．A friend in need is a friend indeed. |
Fear may be felt in the heart as well as in the head, according to a study that has found a link between the cycles of a beating heart and the chance of someone feeling fear.
Tests on healthy volunteers found that they were more likely to feel a sense of fear at the moment when their hearts are contracting(收缩) and pumping blood around their bodies, compared with the point when the heartbeat is relaxed. Scientists say the results suggest that the heart is able to influence how the brain responds to a fearful event, depending on which point it is at in its regular cycle of contraction and relaxation.
Sarah Garfinkel at the Brighton and Sussex Medical School said: "Our study shows for the first time that the way in which we deal with fear is different depending on when we see fearful pictures in relation to our heart."
The study tested 20 healthy volunteers on their reactions to fear as they were shown pictures of fearful faces. Dr Garfinkel said, "The study showed that fearful faces are better noticed when the heart is pumping than when it is relaxed. Thus our hearts can also affect what we see and what we don't see - and guide whether we see fear."
To further understand this relationship, the scientists also used a brain scanner(扫描仪) to show how the brain influences the way the heart changes a person's feeling of fear. “We have found an important mechanism by which the heart and brain ‘speak’to each other to change our feelings and reduce fear," Dr Garfinkel said.
"We hope that by increasing our understanding about how fear is dealt with and ways that it could be reduced, we may be able to develop more successful treatments for anxiety disorders, and also for those for those who may be suffering from serious stress disorder."What is the finding of the study?
| A．One's heart affects how he feels fear. |
| B．fear is a result of one's relaxed heartbeat. |
| C．fear has something to do with one's health. |
| D．Ones fast heartbeats are likely to cause fear. |
The study was carried out by analyzing _______.
| A．volunteers' heartbeats when they saw terrible pictures |
| B．the time volunteers saw fearful pictures and their health conditions |
| C．volunteers' reactions to horrible pictures and data from their brain scans |
| D．different pictures shown to volunteers and their heart-brain communication |
Which of the following is closest in meaning to "mechanism" in Paragraph 6?
| A．Order. | B．system. | C．machine. | D．treatment. |
This study may contribute to _______.
| A．treating anxiety and stress better |
| B．explaining the cycle of fear and anxiety |
| C．finding the sky to the heart-brain communication |
| D．understanding different fears in our hearts and heads |
Home to me means a sense of familiarity and nostalgia(怀旧). It's fun to come home. It looks the same. It smells the same. You'll realize what's changed is you. Home is where we ran remember pain, live, and some other experiences; We parted here; My parents met here; I won three championships here.
If I close my eyes, I can still have a clear picture in mind of my first home. I walk in the door and see a brown sofa surrounding a low glass-top wooden table. To the right of the living room is my first bedroom. It's empty, but it's where my earliest memories are.
There is the dining room table where I celebrated birthdays, and where I cried on Halloween-when I didn't want to wear the skirt my mother made for me. I always liked standing on that table because it made me feel tall and strong. If I sit at this table, I can see my favorite room in the house, my parents' room. It is simple: a brown wooden dresser lines the right side of the wall next to a television and a couple of photos of my grandparents on each side. Their bed is my safe zone. I can jump on it anytime - waking up my parents if I am scared or if I have an important announcement that cannot wait until the morning.
I'm lucky because I know my first home still exists. It exists in my mind and heart, on a physical property(住宅) on West 64th street on the western edge of Los Angeles. It is proof I lived, I grew and I learned.
Sometimes when I feel lost, I lie down and shut my eyes, and I go home. I know it's where I'll find my family, my dogs, and my belongings. I purposely leave the window open at night because I know I'll be blamed by Mom. But I don't mind, because I want to hear her say my name, which reminds me I'm home.Why does the author call her parents' bed her "safe zone"(Paragraph 3)?
| A．It is her favorite place to play. |
| B．Her needs can be satisfied there. |
| C．Her grandparents' photos are lined on each side. |
| D．Her parents always play together with her there. |
What can be learned from the passage?
| A．The old furniture is still in the author's fist bedroom. |
| B．The author can still visit her first physical home in Los Angeles. |
| C．The author's favorite room in her first home is the dining room. |
| D．Many people of the author's age can still find their first physical homes. |
Sometimes when she feels lost, the author will _______.
| A．Open the window at night |
| B．lie down in bed to have a dream |
| C．try to bring back a sense of home |
| D．go to Los Angeles to visit her mom |
What is the author's purpose of writing this passage?
| A．To express how much she is attached to her home. |
| B．To declare how much she loves her first house. |
| C．To describe the state of her family. |
| D．To look back on her childhood. |
LONDON - A British judge on Thursday sentenced a businessman who sold fake(假冒的) bomb detectors(探测器) to 10 years in prison, saying the man hadn't cared about potentially deadly consequences.
It is believed that James McCormick got about $77.8 million from the sales of his detectors - which were based on a kind of golf ball finder - to countries including Iraq, Belgium and Saudi Arabia.
McCormick, 57, was convicted(判罪) of cheats last month and sentenced Thursday at the Old Bailey court in London.
"Your cheating conduct in selling a great amount of useless equipment simply for huge profit promoted a false sense of security and in all probability materially contributed to causing death and injury to innocent people," Judge Richard Hone told McCormick. "you have neither regret, nor shame, nor any sense of guilt."
The detectors, sold for up to $42,000 each, were said to be able to find such dangerous objects as bombs under water and from the air. But in fact they "lacked any grounding in science" and were of no use.
McCormick had told the court that he sold his detectors to the police in Kenya, the prison service in Hong Kong, the army in Egypt and the border control in Thailand.
"I never had any had results from customers," he said.Why was McCormick sentenced to prison?
| A．He sold bombs. | B．He caused death of people. |
| C．He made detectors. | D．He cheated in business. |
According to the judge, what McCormick had done _______.
| A．increased the cost of safeguarding |
| B．lowered people's guard against danger |
| C．changed people's idea of social security |
| D．caused innocent people to commit crimes |
Which of the following is true of the detectors?
| A．They have not been sold to Africa. |
| B．They have caused many serious problems. |
| C．They can find dangerous objects in water. |
| D．They don't function on the basis of science. |
It can be inferred from the passage that McCormick _______.
| A．sold the equipment at a low price |
| B．was well-known in most countries |
| C．did not think he had committed the crime |
| D．had not got such huge profit as mentioned in the text |
On a sunny day last August, Tim heard some shouting. Looking out to the sea carefully, he saw a couple of kids in a rowboat were being pulled out to sea.
Two 12-year-old boys, Christian and Jack, rowed out a boat to search for a football. Once they'd rowed beyond the calm waters, a beach umbrella tied to the boat caught the wind and pulled the boat into open water. The pair panicked and tried to row back to shore. But they were no match for it and the boat was out of control.
Tim knew it would soon be swallowed by the waves. "Everything went quiet in my head," Tim recalls(回忆). "I was trying to figure out how to swim to the boys in a straight line."
Tim took off his clothes and jumped into the water. Every 500 yards or so, he raised his head to judge his progress. "At one point, I considered turning back," he says. "I wondered if I was putting my life at risk." After 30 minutes of struggling, he was close enough to yell to the boys, "Take down the umbrella!" Christian made much effort to take down the umbrella. Then Tim was able to catch up and climb aboard the boat. He took over rowing, but the waves were almost too strong for him.
"Let's aim for the pier(码头)," Jack said. Tim turned the boat toward it. Soon afterward, waves crashed over the boat, and it began to sink. "Can you guys swim?" he cried. "A little bit," the boys said. Once they were in the water, Tim decided it would be safer and faster for him to pull the boys toward the pier. Christian and Jack were wearing life jackets and floated on their backs. Tim swan toward land as water washed over the boys' faces.
“Are we almost there?” they asked again and again. "Yes," Tim told them each time. After 30minutes, they reached the pier.Why did the two boys go to the sea?
| A．To go boat rowing. |
| B．To get back their football. |
| C．To swim in the open water. |
| D．To test the umbrella as a sail. |
What does "it” in Paragraph 2 refer to?
| A．The beach. | B．The water. |
| C．The boat. | D．The wind. |
Why did Tim raise his head regularly?
| A．To take in enough fresh air. |
| B．To consider turning back or not. |
| C．To check his distance from the boys. |
| D．To ask the boys to take down the umbrella. |
How did the two boys finally reach the pier?
| A．They were dragged to the pier by Tim. |
| B．They swam to the pier all by themselves. |
| C．They were washed to the pier by the waves. |
| D．They were carried to the pier by Tim on his back. |
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