unit16reading(nx)内容摘要：
d a tie to the frame Tie a long string Fix a very sharp piece of metal Fasten a key to the end of the string Tie a silk ribbon to the string Let’s see the experiment! Equipment Usage A kite Key A condenser A sharp metal String A silk ribbon Attract lightning Feel if there is electricity Collect and store electricity Pull the electricity from the cloud Conduct the electricity well Protect you from the electricity 1. In 1752 scientists already knew what electricity is. 2. Franklin was helped by a friend to do the experiment. 3。阅读剩余 0%
本站所有文章资讯、展示的图片素材等内容均为注册用户上传(部分报媒/平媒内容转载自网络合作媒体)，仅供学习参考。
用户通过本站上传、发布的任何内容的知识产权归属用户或原始著作权人所有。如有侵犯您的版权，请联系我们反馈本站将在三个工作日内改正。