单项选择题
A.40% B.50% C.60% D.70%
A.智力年龄 B.心理年龄 C.比率智商 D.离差智商
A.100+16(X一M)/S B.100.4-16(X-M)/S C.100+15(x-M)/S D.100±15(X-M)/S