人教版九年级英语上册《When was it invented?》SectionA PPT下载(第1课时)，共34页。情景导入T：There are many useful things in the world.They help us a lot in life.(Show some pictures on the screen)When were they invented?S1：The telephone was invented in 1876.S2：The computer was invented in…生成新知Do you know them?When were they invented?Who were they invented by?Talk about the inventions(发明).Which one do you think is the most helpful in our daily life?问题探究辨析invent/discover/find/find out① invent意为“发明；创造”，主要指通过想象、研究、劳动等创造出前所未有的东西，尤指科技上的创造发明。② discover指发现或偶然发现本身就存在但未被认识的事物。③ find强调找的结果，即“找到”，通常指偶然发现。④ find out指经过观察、调查，把某事物查出来，意为“搞清楚；弄明白”。... ... ...关键词：When was it invented? PPT课件免费下载，.PPT格式； 本作品中主体文字及图片可替换修改，文字修改可直接点击文本框进行编辑，图片更改可选中图片后单击鼠标右键选择更换图片，也可根据自身需求增加和删除作品中的内容，源文件无水印。如认为该内容涉嫌侵权，可通过邮件提出书面通知，我们将及时处理。