选择性必修第一册 提分练二十四 UNIT 3(B组) CONSERVATION-【赢在微点】2024高考英语大一轮复习顶层设计核心微练课件PPT（新教材新高考)北师大版

高考复习顶层设计·英语 1 高考复习顶层设计 英语 选择性必修第一册 2 提分练二十四　UNIT 3(B组) 24 3 点击 导航 高考复习顶层设计 英语 第 ‹#› 页 赢在字里行间 提分练二十四　UNIT 3(B组) 4 点击 导航 高考复习顶层设计 英语 第 ‹#› 页 赢在字里行间 提分练二十四　UNIT 3(B组) 5 点击 导航 高考复习顶层设计 英语 第 ‹#› 页 赢在字里行间 提分练二十四　UNIT 3(B组) 点击 导航 高考复习顶层设计 英语 第 ‹#› 页 赢在字里行间 提分练二十四　UNIT 3(B组) 点击 导航 高考复习顶层设计 英语 第 ‹#› 页 赢在字里行间 提分练二十四　UNIT 3(B组) 8 点击 导航 高考复习顶层设计 英语 第 ‹#› 页 赢在字里行间 提分练二十四　UNIT 3(B组) 9 点击 导航 高考复习顶层设计 英语 第 ‹#› 页 赢在字里行间 提分练二十四　UNIT 3(B组) 10 点击 导航 高考复习顶层设计 英语 第 ‹#› 页 赢在字里行间 提分练二十四　UNIT 3(B组) 11 点击 导航 高考复习顶层设计 英语 第 ‹#› 页 赢在字里行间 提分练二十四　UNIT 3(B组) 12 点击 导航 高考复习顶层设计 英语 第 ‹#› 页 赢在字里行间 提分练二十四　UNIT 3(B组) 13 点击 导航 高考复习顶层设计 英语 第 ‹#› 页 赢在字里行间 提分练二十四　UNIT 3(B组) 点击 导航 高考复习顶层设计 英语 第 ‹#› 页 赢在字里行间 提分练二十四　UNIT 3(B组) 15 点击 导航 高考复习顶层设计 英语 第 ‹#› 页 赢在字里行间 提分练二十四　UNIT 3(B组) 16 本部分内容讲解结束 17 语法填空 There are many reasons why the ocean floor is worth 　1　 (explore). So why is so much of it still unknown? There are several technical challenges that researchers face when visiting the ocean floor. First, there is the fundamental limitation that humans can’t breathe in water 　2　 fish. Even when divers 　3　 (equip) with special devices to breathe, below 100 feet deep, they can experience nitrogen narcosis, a condition 　4　 makes people feel and appear uncomfortably drunk or confused. Even if that wasn’t an issue, if you were to go thousands of feet below the surface of the ocean, the pressure is 　5　 extreme that it would crush you to death. Human⁃occupied submersibles enable humans to explore the deep ocean, 　6　 they are expensive and limited in numbers. That’s why most of the deep⁃sea research is done by unmanned vehicles that explore 　7　 (extreme) dangerous environments. However, the ocean’s water 　8　 (it) creates problems because it corrodes (腐蚀) the devices that are meant to explore it. What’s more, 　9　 (communicate) is difficult under water. Radio frequency waves attenuate (减弱) rapidly under water, so our usual 　10　 (method) of transmitting data are useless. Navigation is also diffic