专题一第五节　词句猜测题-【创新思维】2023高考二轮英语专题复习配套PPT课件（新教材新高考）

第五节　词句猜测题 题型1　语境分析猜词义 二轮 · 英语 题型剖析·典例示范 跟踪训练·素养落实 专题限时训练 　(2022·全国乙卷·C) 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 billions 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. 二轮 · 英语 题型剖析·典例示范 跟踪训练·素养落实 专题限时训练 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. 二轮 · 英语 题型剖析·典例示范 跟踪训练·素养落实 专题限时训练 That includes huge savings in maintenance 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. 二轮 · 英语 题型剖析·典例示范 跟踪训练·素养落实 专题限时训练 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 二轮 · 英语 题型剖析·典例示范 跟踪训练·素养落实 专题限时训练 autonomously. Very small drones with advanced sensors and AI and travelling ahead of the train could guide it like a co­pilot.With their ab