问题 选择题

结合语境,在下面语段中的横线处填写句子最恰当的一项是  

起风了,风从沙漠那边来,那苍劲的沙枣,挺起古铜色的躯干,舞动起粗壮的臂膀,与狂风展开了搏击;那伟岸的白杨,拔地而起,   ①  ;那繁茂的榆柳,提起她们的裙裾,笑迎着扑面的风沙。这些沙海边的绿色啊,使人振奋,予人勇气,   ②  。它们是对坚韧不屈的沙漠生命最好的诠释。

A.①在云空里傲视着将至的烟尘②给人安慰

B.①高昂的头转瞬蒙上了一层黄沙②安慰着人们

C.①高昂的头转瞬蒙上了一层黄沙②给人安慰

D.①在云空里傲视着将至的烟尘②安慰着人们

答案

答案:A

注意观察上下文句式的特点,加强语意衔接训练,选择恰当的语句。

单项选择题

(A)

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 band. He could even talk as he watched the vehicle and guided it with his thoughts.

"Our brain has billions of nerve ceils. 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.

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

判断题