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 (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.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 本文是一則新聞報道,科學家尋找到了一種方法,把人腦與電腦連接起來,進而發(fā)明了Brain-computer interface(BCI)技術的發(fā)明,文中介紹了它的原理和對殘疾人帶來的益處.
解答 33.D.細節(jié)理解題.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就是為了讓人腦來直接連接電腦并控制.故選D.
34.C.細節(jié)理解題.由"In the laboratory,Tavella operated the wheelchair just by thinking about moving his left or right hand."可知,Tavella用移動左右手的想法來控制輪椅.故選C.
35.B.主旨大意題.本文是新聞文體,因此要關注首段的中心,由首段的第二句話"Brain-computer interface(BCI) technology could help people withdisabilities send commands to machines."可知最佳標題是.bci可能意味著殘疾人更多的自由;故選B.
點評 考察學生的細節(jié)理解和推理判斷能力,做細節(jié)理解題時一定要找到文章中的原句,和題干進行比較,再做出正確的選擇.在做推理判斷題不要以個人的主觀想象代替文章的事實,要根據(jù)文章事實進行合乎邏輯的推理判斷.