2018 作业完毕谢谢观看 We have many PowerPoint templates that has been specifically designed to help anyone that is stepping into the world of PowerPoint for the very first time. 制作人邵炜桓 时间：2018年4月14日作业完毕 谢谢观看 We have many PowerPoint templates that has been specifically designed to help anyone that is stepping into the world of PowerPoint for the very first time. 制作人:邵炜桓 时间:2018年4月14日 2018