第三部分 主题七 人与自然自然生态-【全频累积】2023高中英语知识点考点全频积累高一高二高三全适用

405 第三部分 主题语境篇 主题七　人与自然　自然生态 主题群高考分析 1.人与自然主题语境中，自然生态主题群包含以下2个主题语境：主要国家的地理情况；自然 环境、自然遗产保护。 2. 自然生态旨在让学生了解一些主要国家的地理概况，拓宽视野；了解一些自然环境、自然 遗产的重要性，并增强保护自然环境和自然遗产的意识。 3. 自然生态主题群是高考的热点，题型设置包括听力、阅读理解、完形填空、语法填空等。 真题演练·考点透析 解决基本知识问题 高考主题下的阅读理解 【典例1】（2019·江苏高考·B）In the 1960s, while studying the volcanic history of Yellowstone National Park, Bob Christiansen became puzzled about something that, oddly, had not troubled anyone before: he couldn’t find the park’s volcano.It had been known for a long time that Yellowstone was volcanic in nature—that’s what accounted for all its hot springs and other steamy features. But Christiansen couldn’t fi nd the Yellowstone volcano anywhere. Most of us,when we talk about volcanoes, think of the classic cone（圆锥 体）shapes of a Fuji or Kilimanjaro, which are created when erupting magma （岩浆）piles up. These can form remarkably quickly. In 1943, a Mexican farmer was surprised to see smoke rising from a small part of his land.In one week he was the confused owner of a cone fi ve hundred feet high.Within two years it had topped out at almost fourteen hundred feet and was more than half a mile across. Altogether there are some ten thousand of these volcanoes on Earth, all but a few hundred of them extinct. There is, however, a second less known type of volcano that doesn’t involve mountain building. These are volcanoes so explosive that they burst open in a single big crack, leaving behind a vast hole, the caldera. Yellowstone obviously was of this second type, but Christiansen couldn’t fi nd the caldera anywhere. Just at this time NASA decided to test some new high altitude cameras by taking photographs of Yellowstone. A thoughtful offi cial passed on some of the copies to the park authorities on the assumption that they might make a nice blow 　up for one of the visitors’ centers. As soon as Christiansen saw the photos, 状 语 从 句 的 省 略，其完整句式为 while he was studying 本 句 是 一 个 长 句。w h e n引导的是 x1 状语从 句，which引导的是非 限制性定语从句，从 句中含有一个时间状 语的省略