1. 设乙为“1” 甲1*(1-1/4)=3/4
(1-3/4)/(3/4)=1/3
选B
2. 设小明身高“1” 小军1-1/12=11/12
12/(1/12)=144CM 选B
3. 鸡比鸭多 (8-5)/5=60%
鸭比鸡少 (8-5)/8=37.5%
1. 设乙为“1” 甲1*(1-1/4)=3/4
(1-3/4)/(3/4)=1/3
选B
2. 设小明身高“1” 小军1-1/12=11/12
12/(1/12)=144CM 选B
3. 鸡比鸭多 (8-5)/5=60%
鸭比鸡少 (8-5)/8=37.5%