课件名称：Unit 9 when was it invented? SectionA (1a-2c)
适用年级：新课标版 九年级上册 教学课件
简介： ppt制作 To develop the Ss’abilities of listening, speaking, reading and writing by using the sentences “When was it invented? Who was it invented by? What was it used for?” . 上传者：rinaan
