❶ 鲁班是怎样发明锯子的ppt
被锋利像钜型植物叶子枝干割伤
突发奇想
❷ 英语作文 传说早在两千多年以前巧匠鲁班无意中发明了伞一天他在
传说早在两千多年以前巧匠鲁班无意中发明了伞，一天他在回家的路上遇到大雨急忙躲进了亭子里，他突然有了个想法能不能发明一种活动的亭子来遮阳避雨呢? 伞就这样诞生了。
The legend says that more than 2000 years ago. Our country's construction genius Lao Ban had invented umbrella accidently. When he was on his way home one day, met a very heavy rain storm. He ran to a gazebo and started thinking and said to himself that will there be a way to invent a kind of mobile gazebo, which can help people to stay dry when raining? So, that's was how the umbrella was invented.
很乐意能够帮到你，希望会对你有助。
若不明白请继续问，如满意敬请采纳，O(∩_∩)O谢谢你。
❸ 用英语描述鲁班发明了什么怎么发明的
What Luban invented, how invention
❹ 跪求美国崛起英文版的PPT，作业来的！！！
去新浪爱问看看吧