6．Since the 1970s，scientists have been searching for ways to link the brain with computers．Brain-computer interface （界面） （BCI） technology could help people with disabilities send commands to machines．
Recently，two researchers，Jose Milan and Michele Tavella from the Federal Polytechnic schooling 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（頭皮） 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．Milan，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．
28．BCI is a technology that canB．
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
29．How did Tavella operate the wheelchair in the laboratory？D
A．By controlling his muscles．
B．By talking to the machine．
C．By moving his hand．
D．By using his mind．
30、The team will test with real patients toB
A．make profits from them
B．prove the technology useful to them
C．make them live longer
D．learn about their physical condition
31．Which of the following would be the best title for the text？C
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．
分析 文章講述的是這種技術(shù)可以讓人用意念來(lái)控制自己的行動(dòng)，這對(duì)于那些殘疾人是很都幫助的．
解答 28．B．細(xì)節(jié)理解題．根據(jù)第一段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．說(shuō)明這種機(jī)器正是可以把人腦和計(jì)算機(jī)連接起來(lái)的，故B正確．
29．D．細(xì)節(jié)理解題．根據(jù)第三段第一行Tavella operated the wheelchair just by thinking about moving his left or right hand．說(shuō)明他只是在思考在想，故D正確．
30．B．細(xì)節(jié)理解題．根據(jù)文章倒數(shù)第二段The practical possibilities that BCI technology offers to disabled people can be grouped in two categories說(shuō)明他們呀把這個(gè)技術(shù)運(yùn)用于人的人上來(lái)證明這個(gè)技術(shù)的用途．故B正確．
31．C．主旨大意題．文章講述的是這種技術(shù)可以讓人用意念來(lái)控制自己的行動(dòng)，這對(duì)于那些殘疾人是很都幫助的．故C正確．
點(diǎn)評(píng) 考察學(xué)生的細(xì)節(jié)理解和推理判斷能力，做細(xì)節(jié)理解題時(shí)一定要找到文章中的原句，和題干進(jìn)行比較，再做出正確的選擇．在做推理判斷題不要以個(gè)人的主觀想象代替文章的事實(shí)，要根據(jù)文章事實(shí)進(jìn)行合乎邏輯的推理判斷．
