下列程序段的输出结果为______。 Dimy As Integer Private Sub Commandl_CUck() DimX As Integer x=2 TeKt1.Text=SecondFunc(FirStFunC(X)，y) Text2.Text=FirstFunc(X) End Sub PrivateFunctionFirstFunc(XASInteger)As Integer x=x+y:y=x+y FirstFunc=x+y End Function PtivateFunction SecondFunc(X As Integer,y AS Integer)As Integer SecondFunc=2*x+y End Function

下列哪一项是气在血液生成中的作用

A．动力

B．原料

C．动力和原料

D．气能化津