Niagara Falls ____________ in Canada. [ ]
A. are
B. is
答案:B
全国人民代表大会的代表必须是 * * 党员。()
在窗体上面两个名称分别为Command1和Command2、标题分别为“初始化”和“求和”的命令按钮。程序运行后,如果单击“初始化”命令按钮,则对数组a的各元素赋值;如果单击“求和”命令按钮,则求出数组a的各元素之和,并在文本框中显示出来。请填空。 Option Base 1 Dim a(3,2) As Integer Private Sub Command1_Click() For i=1 To 3 For i=1 To 2 (7) =i+j Next i End Sub Private Sub Command2_Click() For j=1 To 3 For i=1 To 2 s=s+a(i,j) Next i Next j Text1.Text= (8) End Sub