题目内容
17.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.
33.BCI is a technology that canD.
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
34.How did Tavella operate the wheelchair in the laboratory?C
A.By talking to the machine.B.By controlling his muscles.
C.By using his mind.D.By moving his hand.
35.Which of the following would be the best title for the text?B
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.
分析 本文是一则新闻报道,科学家寻找到了一种方法,把人脑与电脑连接起来,进而发明了Brain-computer interface(BCI)技术的发明,文中介绍了它的原理和对残疾人带来的益处.
解答 33.D.细节理解题.由"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."可知BCI就是为了让人脑来直接连接电脑并控制.故选D.
34.C.细节理解题.由"In the laboratory,Tavella operated the wheelchair just by thinking about moving his left or right hand."可知,Tavella用移动左右手的想法来控制轮椅.故选C.
35.B.主旨大意题.本文是新闻文体,因此要关注首段的中心,由首段的第二句话"Brain-computer interface(BCI) technology could help people withdisabilities send commands to machines."可知最佳标题是.bci可能意味着残疾人更多的自由;故选B.
点评 考察学生的细节理解和推理判断能力,做细节理解题时一定要找到文章中的原句,和题干进行比较,再做出正确的选择.在做推理判断题不要以个人的主观想象代替文章的事实,要根据文章事实进行合乎逻辑的推理判断.
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