主题语境练15 选择性必修第二册 UNIT 1 SCIENCE AND SCIENTISTS-【赢在微点】2024高考英语大一轮复习顶层设计高考练重点word（新教材新高考）人教版

主题语境练15　选择性必修第二册　UNIT 1 科学与技术 限时40分钟 阅读理解　(2023·绍兴质检)　体裁:说明文　主题语境:现代技术　难度:★★★★☆ 　　Aeronautics (航空学) specialists from the University of South Australia spent months studying the dragonfly􀆳s flight, creating 3D models from digital images, to build a winged drone (无人机). Study leader Javaan Chahl believes winged drones based on the dragonfly􀆳s shape and movement will simply be more flexible and energy efficient. Chahl􀆳s team used a special photography technique to classify the wing shapes of 75 different dragonfly species from museum collections. Their wings are long, light and hard. Plus, their long bodies give them excellent stability and balance, making it possible for winged drones to deliver awkward loads and undertake long observation missions. Investigating the way dragonflies remain stable during flight actually reveals the techniques they use to get themselves out of tricky situations. Dragonflies are found to be able to perform upside⁃down backflips to regain balance and normal flight, when they find themselves upside down mid⁃air. This special skill can even be performed while dragonflies are unconscious, meaning it is a passive stability mechanism similar in concept to planes that are designed to glide to safety with their engines turned off. Engineers are looking to copy dragonfly wings to create safer drones that can right themselves. Of course, not all attempts to build dragonfly⁃like drones are successful. TechJet􀆳s air vehicle was supposed to operate as an aerial camera, observation and security drone, but it failed before production got underway. Similarly, Insectothopter, an American dragonfly spy drone built in the 1970s was deserted. Yet the principles behind winged drones are solid. In fact, NASA has settled on a nuclear⁃powered autonomous craft called Dragonfly to explore the surface of Saturn􀆳s moon Titan in 2034. NASA􀆳s project is actually an air vehicle, rather than a winged drone, but engineers are still convinced they can crack the c