P60.窗体中有文本框Text1、Text2和Text3。运行,输入整数m和n(n>0),单击按钮Command1计算下列表达式的值: SUM=m+m(m-1)/2+(m+2)/3+(m-3)/4...+(m(-1)n+1(n-1))/n 在Text3给出结果,事件代码如下: Private Sub Command1_Cilck() Dim sum As Double m=Val(Me!Text1) n=Val(Me!Text2) sum=0 For k1 to n sum=sum=(【】)/k Next k Me!Text3=sum End Sub 程序【】处应填写的语句是:
A.
m+IId(k Mod 2=0,-k+1,k-1)
B.
m+IId(k Mod 2=0,k-1,-k+1)
C.
IId(k Mod 2=1,m-k+1,m+k-1)
D.
IId(k Mod 2<0,m+k-1,-m+k-1)< p="">