潮的大气腐蚀发生时,金属表面存在着肉眼看不见的液膜,这层液膜起着()的作用。
A.杂质
B.电解质
C.电介质
D.绝缘
参考答案:B
While having breakfast, Lee went through all the ______ ads in the newspaper, hoping to find a suitable job.
A.identified
B.classified
C.simplified
D.clarified
在窗体上画一个名称为Text1 的文本框和一个名称为Command1 的命令按钮,然后编写如下事件过程: Private Sub Commandl1_Click( ) Dim array1 ( 10, 10) As Integer Dim i,j As Integer For i=1 To 3 For j = 2 To 4Array1 (i, j) =i +j Next j Next i Text1.Text=array1(2.3) + array1(3.4) End Sub程序运行后,单击命令按钮,在文本框中为示的值是( )。
A.12
B.13
C.14
D.15