【单选题】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 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( )。
【单选题】Double click on the _____ to open the file.
【单选题】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循环来计算一个表达式的值,这个表达式是
【判断题】CO 2 焊设备连接时应先连接焊接电源,然后是设备的接地,连接焊枪、气路及送丝机。
【单选题】The main idea of the second paragraph is______
A.
how to avoid double-click on infected email attachments
B.
how emails both carry and spread viruses and worms
C.
what new viruses can automatically launch themselves
D.
what new viruses are capable of with an double-click on
【单选题】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 3 x=n/i n=n+1 sum=sum+x Next i End Sub 该程序通过For循环来计算sum的值,sum值的精确结果是( )。
【简答题】当晶格周期性的破坏是发生在晶体内部一条线的周围近邻,这就称为 ,位错就是其中的一种,典型位错包括刃型位错和 位错。