课时分层作业25 必修5 Unit 5 First aid(Word练习)-【名师导航】2024年高考英语一轮总复习(老高考)人教版

课时分层作业(二十五) 必修5　Unit 5　First aid Ⅰ．阅读理解 (2022·石家庄市高中毕业班教学质量检测) 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． 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． 2．What i