设有如下程序: Private Sub Command1_Click() Dim sum As Double, x As Double sum = 0 n = 0 For i = 1 To 5 x = n / I n = n + 1 sum = sum + x Next I End Sub 该程序通过For循环计算一个表达式的值,这个表达式是()
A. 1+1/2+2/3+3/4+4/5
B. 1+1/2+2/3+3/4
C. 1/2+2/3+3/4+4/5
D. 1+1/2+1/3+1/4+1/5
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为了改变计时器控件的时间间隔,应该修改该控件的()属性
A. Enabled
B. Visible
C. Interval
D. Timer
下面哪些控件不会影响到界面设计效果().
A. 定时器
B. 文本框
C. 标签
D. Line控件
以下程序段的输出结果是() num =0 DO While num<=2 num = num+1 Loop Print num
A. 1
B. 2
C. 3
D. 4
以下能够正确计算n!的程序是()
A. Private Sub Command1_Click() n = 5: x = 1 Do x = x * I i = i + 1 Loop While i < n Print x End Sub
B. Private Sub Command1_Click() n = 5: x = 1:i = 1 Do x = x * I i = i + 1 Loop While i < n Print x End Sub
C. Private Sub Command1_Click() n = 5: x = 1:i = 1 Do x = x * I i = i + 1 Loop While i <= n Print x End Sub
D. Private Sub Command1_Click() n = 5: x = 1:i = 1 Do x = x * I i = i + 1 Loop While i > n Print x End Sub
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