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（展示）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．

1.BCI is a technology that can         .

     A．help to update computer systems        

B．link the human brain with computers

     C．help the disabled to recover           

D．control a person's thoughts  

2.How did Tavella operate the wheelchair in the laboratory?                                                                    

     A．By controlling his muscles．           

B．By talking to the machine．       

     C．By moving his hand．                   

D．By using his mind．

3.The team will test with real patients to         .

     A．make profits from them             

B．prove the technology useful to them

     C．make them live longer              

D．learn about their physical condition

4.Which of the following would be the best title for the text?

     A．Switzerland, the BCI Research Center

     B．New Findings About How the Human Brain Works

     C．BCI Could Mean More Freedom for the Disabled

     D．Robotic Vehicles Could Help to Cure Brain Injuries

Speeding off in a stolen car, the thief thinks he has got a great catch. But he is in for an unwelcome surprise. The car is fitted with a remote immobiliser (锁止器), and a radio signal from a control centre miles away will ensure that once the thief switches the engine off, he will not be able to start it again.

The idea goes like this. A control box fitted to the car contains a mini-cellphone, a micro- processor and memory, and a GPS (全球定位系统) satellite positioning receiver. If the car is stolen, a coded cellphone signal will tell the control centre to block the vehicle's engine management system and prevent the engine being restarted.

In the UK, a set of technical fixes is already making life harder for car thieves. 'The pattern of vehicle crime has changed,’ says Martyn Randall, a security expert. He says it would only take him a few minutes to teach a person how to steal a car, using a bare minimum of tools. But only if the car is more than 10 years old.

Modern cars are far tougher to steal, as their engine management computer won't allow them to start unless they receive a unique ID code beamed out by the ignition (点火) key. In the UK, technologies like this have helped achieve a 31% drop in vehicle-related crime since 1997.

But determined criminals are still managing to find other ways to steal cars, often by getting hold of the owner's keys. And key theft is responsible for 40% of the thefts of vehicles fitted with a tracking system.

If the car travels 100 metres without the driver confirming their ID, the system will send a signal to an operations centre that it has been stolen. The hundred metres minimum avoids false alarms due to inaccuracies in the GPS signal.

Staff at the centre will then contact the owner to confirm that the car really is missing, and keep police informed of the vehicle's movements via the car's GPS unit.

66. What's the function of the remote immobilizer fitted to a car?

A .To allow the car to lock automatically when stolen.

B. To prevent the car thief from restarting it once it stops.

C. To help the police make a surprise attack on the car thief.

D. To prevent car theft by sending a radio signal to the car owner.

67. By saying 'The pattern of vehicle crime has changed' (Lines 1-2. Para. 3). Martyn Randall suggests that ____.

A. self-prepared tools are no longer enough for car theft

B. the thief has to make use of computer technology

C. it takes a longer time for the car thief to do the stealing

D. the thief has lost interest in stealing cars over 10 years old

68. What is essential in making a modern car tougher to steal?

A. A GPS satellite positioning receiver.　      B. A unique ID card.   

C. A special cellphone signal.                D. A coded ignition key.

69. Why does the tracking system set a 100-metre minimum before sending an alarm to the operations centre?

A. To give the driver time to contact the operations centre.

B. To allow for possible errors in the GPS system.

C. To keep police informed of the car's movements.

D. To leave time for the operations centre to give an alarm.

70. What will the operations centre do first after receiving an alarm?

A. Start the tracking system.         B. Locate the missing car.

C. Contact the car owner.　         D. Block the car engine

Hospital emergency rooms treat injured fingers all the time. Without treatment，a bad cut can lead to permanent damage. But how should a person know when a bleeding cut is serious enough to require medical attention? We asked Dr. Martin Brown. Chairman of the department of emergency medicine at Inova Alexandria Hospital in Virginia.   

First，the medical term for a cut or tear in the skin is a laceration(严重划破，撕裂伤). Dr. Brown says the length is usually not as important as the depth. He says a long cut on a finger can likely be treated without a visit to a doctor if the wound is not very deep. “If you have a short but deep laceration where there’s been a structure underneath that's been damaged a tendon，a nerve，a blood vessel,”says Martin，“it may, in fact，need professional attention. ”

Some injuries —like a fingertip that gets cut off might even require surgery to repair. That requires a specialist to either file(锉平) down the bone or reattach the fingertip. More often，filing down the bone is what is done because reattaching a fingertip is often not successful.

How a wound bleeds can be a sign of how serious it is. Minor cuts usually produce what is known as venous(静脉)bleeding. This means the blood flows steadily from the injury. The bleeding will often stop when pressure is put on the wound. Dr. Brown says in most cases holding direct pressure with clean gauze or a cloth for four to five minutes should stop the bleeding. With a cut finger, holding the hand above the heart can reduce the loss of blood. But if a cut appears to be pumping blood out with some force，this may be a sign of arterial(动脉)bleeding. This kind of injury should be treated by a medical professional as soon as possible.

Even a cut that does not require medical attention must be kept clean to prevent infection. Small cuts should be cleaned gently with clean water. Use a washcloth to clean the area if the wound is dirty. Dr Brown says cuts should be covered with a clean, dry bandage. 

1. What does the writer want to tell the readers in the first paragraph? 

2. According to the passage，_____________________.

3. The underlined word “reattach” in Para. 3 is closest in meaning to ________________.

4. Which of the following statements in NOT true according to the passage?

5. The best title of this passage should be ______________________.

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（展示）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．

1.BCI is a technology that can         .

2.How did Tavella operate the wheelchair in the laboratory?                                    

3.The team will test with real patients to         .

4.Which of the following would be the best title for the text?

This year some twenty-three hundred teen-agers (young people aged from 13-19) from all over the world will spend about ten months in U.S. homes . They will attend U. S. schools , meet U.S. teenagers , and form impressions of the real America . At the same time , about thirteen hundred American teenagers will go to other countries to learn new languages and gain a new understanding of the rest of the world .

Here is a two-way student exchange in action . Fred , nineteen ,spent last year in Gemany with George’s family . In turn , George’s son Mike spent a year in Fred’s home in America .

Fred , a lively young man , knew little German when he arrived , but after two months’ study , the language began to come to him . School was completely different from what he had expected-much harder . Students rose respectfully when the teacher entered the room . They took fourteen subjects instead of the six that are usual in the United States . There were almost no outside activities .

Family life , too , was different . The father’s word was law , and all activities were around the family rather than the individual. Fred found the food too simple at first . Also , he missed having a car .

“Back home ,you pick up some friends in a car and go out and have a good time . In Germany , you walk , but you soon learn to like it .”

At the same time , in America , Mike , a friendly German boy , was also forming his idea . “I suppose I should criticize American schools .” He says , “it is far too easy by our level . But I have to say that I like it very much . In Germany we do nothing but study . Here we take part in many outside activities . I think that maybe your schools are better in training for citizens . There ought to be some middle ground between the two .”

1.The whole exchange programme is mainly to         .

2.Fred and Mike agreed that         .

3.What is particular in American school is that         .

4.After experiencing the American school life , Mike thought         .