A.3:1 B.15:7 C.9:7 D.15:9
A.5/8 B.5/9 C.13/16 D.13/18
A.1/4,分離規(guī)律 B.3/8,分離規(guī)律 C.1/4,自由組合規(guī)律 D.3/8,自由組合規(guī)律