写比值 1.8:9= 0.35:7= 3/5:3= 4/7:2=写比值 1.8:9= 0.35:7= 3/5:3= 4/7:2= 4.2:6= 31:63= 2/5:1/2= 1:0.3= 4/9:2/3= 0.25:1/4=

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写比值1.8:9=0.35:7=3/5:3=4/7:2=写比值1.8:9=0.35:7=3/5:3=4/7:2=4.2:6=31:63=2/5:1/2=1:0.3=4/9:2/3=0.25:1/4=写

写比值 1.8:9= 0.35:7= 3/5:3= 4/7:2=写比值 1.8:9= 0.35:7= 3/5:3= 4/7:2= 4.2:6= 31:63= 2/5:1/2= 1:0.3= 4/9:2/3= 0.25:1/4=
写比值 1.8:9= 0.35:7= 3/5:3= 4/7:2=
写比值 1.8:9= 0.35:7= 3/5:3= 4/7:2= 4.2:6= 31:63= 2/5:1/2= 1:0.3= 4/9:2/3= 0.25:1/4=

写比值 1.8:9= 0.35:7= 3/5:3= 4/7:2=写比值 1.8:9= 0.35:7= 3/5:3= 4/7:2= 4.2:6= 31:63= 2/5:1/2= 1:0.3= 4/9:2/3= 0.25:1/4=

0.2 0.05 0.2 2/7 0.7

0.2 0.05