单项选择题
A.data linesB.proceduresC.the FORMAT statementD.the INPUT statement
下列哪个proc步完全正确?()A.B.C.D.
单项选择题下列哪个proc步完全正确?()
A.B.C.D.
变量Address2包含诸如Piscataway,NJ之类的值。如何将两个字母的州缩写分配给名为State的新...
单项选择题变量Address2包含诸如Piscataway,NJ之类的值。如何将两个字母的州缩写分配给名为State的新变量?()
A.State=scan(address2,2);B.State=scan(address2,13,2);C.State=substr(address2,2);D.State=substr(address2,13,2);
下列哪项时对Var1,Var2,Var3,Var4求均值?()A.mean(var1,var4)B.mean(...
单项选择题下列哪项时对Var1,Var2,Var3,Var4求均值?()
A.mean(var1,var4)B.mean(var1-var4)C.mean(of var1,var4)D.mean(of var1-var4)