Unit 3 Period Two Part Ⅱ Grammar（课件PPT）-【状元桥·优质课堂】2023-2024学年新教材高中英语选择性必修第一册（北师大版2019）

CONSERVATION Unit 3 Period Two　Topic Talk & Lesson 1 Part Ⅱ　Grammar—Relative Clauses(4)－Defining and Non­defining Clauses 知识总览　自主领悟 语法归纳　要义详析 目 录 Contents 课时作业(十二) 随堂演练　专项过关 知识总览　自主领悟 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 2、4、6、8 5 1、3、7、10 9 返回目录 　 英语　选择性必修　第一册(BS) 语法归纳　要义详析 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 随堂演练　专项过关 who/whom/that where that/which where 返回目录 　 英语　选择性必修　第一册(BS) why As that when 返回目录 　 英语　选择性必修　第一册(BS) who whom 返回目录 　 英语　选择性必修　第一册(BS) which surprised his parents who lost their lives 返回目录 　 英语　选择性必修　第一册(BS) As is known to us all 返回目录 　 英语　选择性必修　第一册(BS) whose houses had burned down 返回目录 　 英语　选择性必修　第一册(BS) 课时作业(十二) 返回目录 　 英语　选择性必修　第一册(BS) 制 作 者：状元桥 适用对象：高中学生 制作软件：Powerpoint2003、 Photoshop cs3 运行环境：WindowsXP以上操作系统 感知以下课文原句，完成方框下的小题 1.Extinctions, where entire species are wiped out, are not unusual in our Earth's history. 2．In fact, over 90 percent of all species that ever lived are now extinct. 3．In the last 500 million years, there have been five times when life on Earth has almost ended. 4.These include the third mass extinction, known as the “Great Dying”， which killed 90% to 96% of all species. 5．Although it is not unusual for species to die out naturally, the rate at which this is now happening is cause for concern. 6．A 2015 study by scientists who were based at Brown University and Duke University in the US, looked at how quickly species die out due to natural causes, that is, the “background extinction rate”． 7.There is a long list of reasons why so many species are dying out: air and water pollution, forests being destroyed, factory farming and overfishing