阅读程序： Option Base 1 Dim arr()As Integer Private Sub Form_Click() Dim i As Integer,j As Integer ReDim arr(3,2) For i=1 To 3 For j=1 To 2 arr(i,j)=i*2+j Next j Next i ReDim Preserve arr(3,4) For j=3 To 4 arr(3,j)=j+9 Next j Print arr(3,2)+arr(3,4) End Sub 程序运行后，单击窗体，输入结果为______。 -题库考试答案搜索网

阅读程序： Option Base 1 Dim arr()As Integer Private Sub Form_Click() Dim i As Integer,j As Integer ReDim arr(3,2) For i=1 To 3 For j=1 To 2 arr(i,j)=i*2+j Next j Next i ReDim Preserve arr(3,4) For j=3 To 4 arr(3,j)=j+9 Next j Print arr(3,2)+arr(3,4) End Sub 程序运行后，单击窗体，输入结果为______。

单选题

2022-07-10 23:13

A、21
B、13
C、8
D、25

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正确答案

A

试题解析

解析：ReDim语句的功能是为动态数组变量重新分配储存空间。而Preserve的功能是当改变原有数组最末维的大小时，使用此关键字可以保持数组中原来的数据。从题目可以看出，第一个For循环是为第二维为1和 2的数组赋值，而第二个For循环是为第二维为3和4的数组赋值。而arr(3,2)=i*2+i=3*2+2=8， arr(3,4)司+9=-4+9=13，故输出结果为8+13=21。

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