https://wenku.baidu.com/view/1d394e5df221dd36a32d7375a417866fb94ac051?fr=uc&_wkts_=1757910914556&svcp_stk=1_mSWLwlvQ0vCcSo2lK4kOAMrKcoFDyfYG7YKBmGvae33oUBbF8xBT4PxVXQpPnGIUzxlVo2pcrTL5o5hfy3gVAu-49EyAHPOZvE-dLLUlaxV2gwlug0K4f9jmJUF6PsL6jc2sjfkwtUL2nHqkvQkv5ML7mA_kbbL52mzk7uP_uvrmK85hEWFOhrOgcDES4uUWZ7NjoN31jM6tSbYhSvb4pg%3D%3D
最好ppt格式啊 不行pdf也可以