https://bgk-photo.cdn.bcebos.com/f9198618367adab406449c239bd4b31c8701e43e.jpghttps://bgk-photo.cdn.bcebos.com/2f738bd4b31c8701f0223586377f9e2f0708ff3e.jpghttps://bgk-photo.cdn.bcebos.com/060828381f30e924e1301b515c086e061d95f73e.jpghttps://bgk-photo.cdn.bcebos.com/b7003af33a87e950a9af740c00385343fbf2b412.jpghttps://bgk-photo.cdn.bcebos.com/b17eca8065380cd736a6258db144ad3459828112.jpghttps://bgk-photo.cdn.bcebos.com/42166d224f4a20a43e8abba780529822720ed03e.jpg第28届全国中学生物理竞赛复赛试题