http://kc.huijiaoyun.com/coursecenter/preparation/myPreparationDetail.action?preparationResource.id=E7008D09AB3F4B9086F22E72A606EECA&fid=2156C05787CA4DD49F76A60405B3E1DC&perresId=55D3F278CED34C31BBC81578E58498B8&businessType=3&selectedBookId=TEX40&selectedChapterId=CPT170

参赛课件—五年级上册《用字母表示数》—利通区东塔三小.rar