0 11:18:41 GMT; path=/; HttpOnly X-Powered-By: ASP.NET Date: Sun, 08 Nov 2020 03:18:40 GMT Connection: keep-alive Content-Length: 41119 【北京课改初中化学九年级课件】北京课改初中化学PPT课件_北京课改初中化学课件大全-7c教育资源中小学课件站