题目

Directions：Read the following passage.Summarize the main idea and the main point(s) of the passage in no more than 60words. Use your own words as far as possible.Robotic Exoskeletons Thanks to robotic exoskeletons, victims of spinal cord (脊髓) injury have a new reason to hope. Robotic exoskeletons, consisting of metal legs, motors, batteries, wiring, a controller and a set of strips work together like the user's bones, muscles and nerves-outside the body. Fastened into an exoskeleton and supported by sticks, users can direct the machinery to take them where they want to go. In addition t从学校走到图书馆，小亮用10分钟，小丽用12分钟，小亮和小丽的速度比是5：4