施工现场的临时食堂,用餐人数在( )人以上的,应设置简易有效的隔油池。
A.50B.100C.150D.200
参考答案:B
In the rectangular coordinate system above, the line y=x is the perpendicular bisector of segment AB (not shown), and the x-axis is the perpendicular bisector of segment BC (not shown). If the coordinates of point A are (2, 3), what are the coordinates of point C ?
下列程序实现的功能是:当在窗体上单击时,将输出a1.txt 文件中的数字字符的个数。Private Sub form_ Click() Dim Ch As String * 1 Dim n As Integer Open "c:\a1. txt" for Input As #10 do while 【7】 Ch = Input(1, #10) if 【8】 then n=n+1 End if Loop 【9】 Close #10End Sub