[单选题]

( 27 )要想在过程 Proc 调用后返回形参 x 和 Y 的变化结果,下列定义语句中正确的是

A. ) Sub Proc ( x as Integer,y as Integer )

B. ) Sub Proc ( ByVal x as Integer, y as Integer )

C. ) Sub Proc ( x as Integer,Byval y as Integer )

D. ) Sub Proc ( Byval x as Integer, Byval y as Integer )

参考答案与解析: