（28）下列程序的运行结果是。 Private Sub Command1_Click() a=1.5 b=1.5 Call fun(a,b) Print a,b Private Sub fun(x,y) x=y*x y=y+x End SubA.2.25 3.75 B.1.5 2.25 C.1.5 0.75 D.0.75 1.5