用If语句表示分段函数,不正确的程序段是__________。
A.If x >=1 Then f = Sqr(x+1) If x < 1 Then f = x*x+3
B.f = x*x+3 If x >=1 Then f = Sqr(x+1)
C.If x >=1 Then f = Sqr(x+1) f = x*x+3
D.If x < 1 Then f = x*x+3 Else f = Sqr(x+1) EndIf
E.f = Sqr(x+1) If x < 1 Then f = x*x+3