单击命令按钮执行下列程序，其输出结果是( )。 Private Sub Command1_Click() Dim a As Integer, b As Integer, c As Integer a=3 b=4 c=5 Print SecProc(c, b, a) End Sub Function FirProc(x As Integer, y As Integer, z As Integer) FirProc=2*x+y+3*z End Function Function SecProc(x As Integer, y As Integer, z As Integer) SecProc=FirProc(z, x, y)+x End Function

A．20

B．22

C．28

D．30

直径4毫米的手表零件，画在图纸上直径是8厘米，这幅图纸的比例尺是[ ]

A．20：1   

B．1：20    

C．2：1