答案　B

　　Ⅳ.阅读理解

　　A

　　Since the 1970s, scientists have been searching for ways to link the brain with computers. Brain­computer 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.”

【2017届高考英语（重庆专用）二轮精练：选修8 unit3 period 2】相关文章：

★ 【人教版】2014届高考英语一轮复习指导考点针对练：必修1 unit3《Travel journal》

★ 重庆市2014高考英语阅读理解一轮（精品）训练题（18）附答案

★ 重庆市2014高考英语阅读理解一轮（精品）训练题（13）附答案

★ 2017届高考英语（重庆专用）二轮精练：选修8 unit3 period 1

★ 【课堂新坐标】2017届高考英语（通用版）二轮复习书面表达专题训练：Ⅱ卷强化增分练 训练2（含解析）

★ 【浙江专用】2014届高考英语一轮复习课时作业(二十六)选修6Unit 1《Art》

★ 【三维设计】2017届高考英语（江苏专用）二轮复习课件：必修3 Unit 2《Language》

★ 2014届高考英语一轮复习课时作业(三十九)选修7Module 3《Literature》（外研版）

★ 【人教版】2014届高考英语一轮复习指导考点针对练：必修1 unit4《Earthquakes》

★ 【三维设计】2017届高考英语（江苏专用）二轮复习阅读理解解题技法示范课件：10