PAGE 第 5 页 共 5 页 课下主题训练 科技发展与信息技术创新，科学精神，信息安全 Ⅰ.阅读理解 A When someone damages their backbone, the injury can leave them paralyzed (瘫痪的)．Now, scientists have given three paralyzed men the ability to walk again, thanks to an implanted device. The human backbone, or the spine, doesn't just help us stand up straight.Inside is the spinal cord, which carries important information between the head and the lower part of the body.This information moves around as bursts of electricity travels between the brain and the other parts of the body.When the spinal cord is hurt, this pathway gets damaged and the patients can't move their legs. Now scientists in Switzerland have given three paralyzed men the ability to walk again.To walk again, the men had surgery.A special device was placed directly on the lower part of their spinal cord, below their injury.This “implant” contains sixteen electrodes, which are small objects that electricity can pass through.The researchers made sure the electrodes were lined up with nerves that control the leg muscles.The scientists controlled the implant from a tablet computer. The patients' brains aren't sending “walking” messages to their legs.Instead, the tablet tells the implant to send the walking messages.The researchers used computers to generate patterns of movement, like taking a step.The patient then used the tablet to choose the pattern and the muscles move in the chosen way.Over time, the men were able to walk using a special walker with buttons to control each leg. The solution isn't perfect.It's very expensive, it requires difficult surgery, and the patients can't walk without the system.But the scientists are hopeful that in the future, this sort of technology will allow many paralyzed people to begin to walk again in just hours. 语篇解读：本文是一篇说明文。文章介绍了一项医学进步：瑞士的科学家可以通过在瘫痪病人体内植入设备来帮助他们重新行走。 1．What's the main function of the spinal cord A．It serves as a message carrier. B．It helps people stand up straight. C．It takes control of the muscles. D．It produces signals for movements. 解析：选A 细节理解题。根据第二段中的“Inside is the ...of the body.”可知，脊髓携带着大脑和下肢之间的重要信息，即它充当着信息载体。 2．What is the implanted device expected to do A．Activate the damaged nerves. B．Identify the position of the injury. C．Test the degree of the damage. D．Bridge the nerve gap made by the injury. 解析：选D 推理判断题。根据第二段中的“When the spinal ...move their legs.”可知，一旦脊髓受损，传输信息的通道会被损坏，病人就无法移动双腿；根据第三段中的“The researchers made ...the leg muscles.”可知，移植的电极会帮助连接控制腿部肌肉的神经，据此可以推断，植入的设备应该能够连接受伤的神经。 3．What is Paragraph 4 mainly about A．How the surgery is performed. B．How the device works on patients. C．How the patients walk without aid. D．How movement patterns are designed. 解析：选B 段落大意题。根据第四段中的“the tablet t ... ...
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