Unit 6 When was it invented？Period 5 Section B 3a－Self Check（课件PPT）-【思而优·全程突破】2023秋九年级英语全一册同步训练（人教版）

九年级英语全一册 使用软件 本课件由WPS Office制作，建议老师选择对应软件打开。课件页面宽高比为16:9。 便捷操作 优质服务 关于课件使用及获取更多优质课件、名校试卷时政热点等，请扫下方码加入教学教研。 课件中的目录、返回目录等均有超链接，点击即可跳转至相应页面。 课件使用说明 UNIT 6　When was it invented? Period 5　Section B 3a－Self Check 目录 内容标准 02 01 读写园地 内容标准： 提升写作技巧，介绍发明给我们的生活带来的变化。 返回目录 Period 5　Section B 3a－Self Check 读写园地 返回目录 Period 5　Section B 3a－Self Check 回答问题 书面表达 回答问题 　　There have been many great inventions in the history that change the way we live. The first great invention was the one that is still very important today — the wheel. This made it easy for people to carry heavy things. 返回目录 Period 5　Section B 3a－Self Check ——回答问题 返回上级 　　For hundreds of years after that， there were few inventions that had as much effect as the wheel. Then in the early 1800s， the world started to change greatly. There was little unknown land left in the world. People did not have to explore(探索)much any more. In the second half of the 19th century， many great inventions were made. Among them were the camera， the electric light and the radio. These have all become a big part of our life today. 返回目录 Period 5　Section B 3a－Self Check ——回答问题 返回上级 　　The first part of the 20th century saw more great inventions. The helicopter in 1909， movies with sound in 1926， the computer in 1946， and jet planes in 1930. This was also a time when a new material was first made. Nylon(尼龙)came out in 1935. It changed the kind of clothes people wear. Of course new inventions continued to be made. Men began looking for ways to go into space， Russia made the first step. Then the United States followed. Since then， other countries， including China and Japan， have made their steps into space. In 1969 men took their biggest step away from the earth.Americans first walked on the moon. In 1973， the first practical mobile phone was invented by Dr. Martin Lawrence Cooper. This was certainly just a beginning. New inventions will someday allow us to do things we have never yet dreamed of. 返回目录 Period 5　Section B 3a－Self Check ——回