Unit 3 Sea Exploration单元引入&课文译文（课件）-【优化探究】2022-2023学年新教材高中英语选择性必修第四册同步导学案（人教版2019）

UNIT 3　SEA EXPLORATION 下页 上页 人教英语 选择性必修 第四册 单元话题 　　“海洋探索”属于课标中“人与自然——自然生态”的主题群。如果没有地球这个广阔的自然环境，人类是不可能生存和繁衍的，而海洋则在自然环境中占很重要的比重。随着人口的迅速增长和生产力的发展、科学技术的突飞猛进，人类把自己的生存空间扩展到了海洋，海洋开发和利用在当今世界的发展中起着举足轻重的作用。 整个单元围绕“海洋探索”这一主题展开，主要包含介绍人类探索海洋的情况、谈论保护海洋生物、写一篇关于海洋探索的议论文等方面的内容。 下页 上页 人教英语 选择性必修 第四册 单元核心素养 下页 上页 人教英语 选择性必修 第四册 话题美文赏读 　　Scientists used to explore the surface of the ocean.Now they are exploring below the surface，too.They want to know about ocean water and the plant and animal life deep in the ocean. In 1934，the scientist William Beebe dived 3,000 feet below the surface in a hollow steel ball.In 1935, August Piccard dived 10,330 feet. In 1960, his son Jean dived to a depth of 35,800 feet. 下页 上页 人教英语 选择性必修 第四册 话题美文赏读 　　All these early dives were deep.But the divers could not stay down for very long.They had to come back up to surface after a few seconds.Scientists needed to stay down longer to study life below surface.Gradually they succeeded.Cousteau，a Frenchman，was able to keep men down to a depth of 36 feet for one month and to a depth of 90 feet for a week. 下页 上页 人教英语 选择性必修 第四册 话题美文赏读 　　Now scientists are developing even better equipment.With this new equipment，men can stay below the surface for days or even weeks.In 1962，Cousteau set up a research station 35 feet below the surface.Then，in 1964，he set up another station on the ocean floor of the Red Sea.This was the first undersea station to operate without help from the surface. 下页 上页 人教英语 选择性必修 第四册 话题美文赏读 　　Many countries are now studying undersea living.Russia has an undersea laboratory in the Crimean Sea.The United States has a laboratory 50 feet down on the ocean floor off the Virgin Island.In 1970，five men lived there for two weeks.Then a team of five women scientists stayed in the laboratory.Next came other teams of men.All were there to explore the ocean depths and to make plans for the use of its resources.Scientists hope to find enough mineral，vegetable，and animal wealth