必修2 Unit 3 Computers-【优化探究】2024高考英语一轮复习高考总复习配套课件（人教版 老教材 老高考）

一轮· 英语 * 必备知识 自主梳理 核心考点 互动探究 跟踪检测 巩固提升 课时作业 即时演练 一轮· 英语 * 必备知识 自主梳理 核心考点 互动探究 跟踪检测 巩固提升 课时作业 即时演练 精读真题提素养/主题下的高考拓展运用 (2022·全国乙卷) Can a small group of drones (无人机) guarantee the safety and reliability of railways and，at the same time，help railway operators save bilions of euros each year? That is the very likely future of applying today's “eyes in the sky” technology to making sure that the millions of kilometres of rail tracks and infrastructure (基础设施) worldwide are safe for trains on a 24/7 basis. 一轮· 英语 * 必备知识 自主梳理 核心考点 互动探究 跟踪检测 巩固提升 课时作业 即时演练 Drones are already being used to examine high­tension electrical lines.They could do precisely the same thing to inspect railway lines and other vital aspects of rail infrastructure such as the correct position of railway tracks and switching points.The more regularly they can be inspected，the more railway safety，reliability and on­time performance will be improved.Costs would be cut and operations would be more efficient (高效) across the board. 一轮· 英语 * 必备知识 自主梳理 核心考点 互动探究 跟踪检测 巩固提升 课时作业 即时演练 That includes huge savings in ___________ costs and better protection of railway personnel safety.It is calculated that European railways alone spend approximately 20 billion euros a year on maintenance，including sending maintenance staff，often at night，to inspect and repair the rail infrastructure.That can be dangerous work that could be avoided with drones assisting the crews' efforts. maintenance 一轮· 英语 * 必备知识 自主梳理 核心考点 互动探究 跟踪检测 巩固提升 课时作业 即时演练 By using the latest technologies，drones could also start providing higher­value services for railways，detecting faults in the rail or switches，before they can cause any safety problems.To perform these tasks，drones for rail don't need to be flying overhead.Engineers are now working on a new concept：the rail drones of the future.They will be moving on the track ahead of the train，and programmed to run 一轮· 英语 * 必备知识 自主梳理 核心考点 互动探究 跟踪检测 巩固提升 课时作业 即时演练 autonomousl