问题 单项选择题

中国的县域确实太复杂,塞北尚在千里冰封、万里雪飘的时候,江南已经百花吐艳、草木争晖了。2000多个县星罗棋布,地理位置、资源禀赋、文化传统和老百姓的生活方式都()。

A.各有千秋

B.千姿百态

C.气象万千

D.千变万化

答案

参考答案:A

解析:

“气象万千”和“千变万化”与前文的“地理位置”、“资源禀赋”等搭配不当,排除CD两个选项。各有千秋:各有各的存在的价值;各有所长;各有特色。千姿百态:形容姿态多种多样,各不相同。文段重在论述各有各的存在价值,而非重在论述各有各的不同,排除B选项。所以选择A选项。

阅读理解

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.

小题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小题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.小题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小题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

多项选择题