关系模式中的各级模式之间的关系为▁▁▁▁▁▁。A、3NFB、https://bgk-photo.cdn.bcebos.com/caef76094b36acaf1d92909d6cd98d1001e99c64.jpgC、2NFD、https://bgk-photo.cdn.bcebos.com/bba1cd11728b47103d25fbadd3cec3fdfc03234c.jpgE、1NFF、3NFG、https://bgk-photo.cdn.bcebos.com/8694a4c27d1ed21b9ec32884bd6eddc451da3f4c.jpgH、1NFI、https://bgk-photo.cdn.bcebos.com/95eef01f3a292df5b4b1aa74ac315c6034a87364.jpgJ、2NFK、1NFL、https://bgk-photo.cdn.bcebos.com/8cb1cb1349540923831b651f8258d109b3de4964.jpgM、2NFN、https://bgk-photo.cdn.bcebos.com/574e9258d109b3deffcde209dcbf6c81800a4c64.jpgO、3NFP、2NFQ、https://bgk-photo.cdn.bcebos.com/a50f4bfbfbedab64b2784ba1e736afc379311e4c.jpgR、1NFS、https://bgk-photo.cdn.bcebos.com/b03533fa828ba61ec69cce4e5134970a304e5964.jpgT、3NF