0:24:18 GMT; path=/; HttpOnly X-Powered-By: ASP.NET Date: Fri, 22 May 2020 02:24:18 GMT Connection: keep-alive Content-Length: 34347 【教科版科学一年级上册课件】教科版小学科学PPT课件_教科版小学科学课件大全_7c教育资源中小学课件站