【简答题】Listen to an interview with Ian Bretman, the deputy director of the Fairtrade Foundation. Choose the best ending A, B or C for each sentence 1-8. 1) The Fairtrade Foundation began in A. . ...
【判断题】74LS273通常用来作简单的输出接口扩展,而74LS244则通常用来作简单的输入接口扩展。
【简答题】以下程序用来建立一个5×5矩阵,该矩阵两条对角线上的元素为1,其余元素为0,请补充完该程序。该程序运行结果如下图所示。 Private Sub form. Click() Dim s(5, 5)As Integer for N =1 To 5 for M = 1 To 5 if【 】Or【 】then S(N, M)=1 Else S(N. M)= 0 End if Next M Next N f...
【判断题】NPN型和PNP型三极管的结构基本相同,工作时各电极连接的电压极性和电流流向相同。
【简答题】用74LS244作输出接口,是否可行?说明原因。
【简答题】以下程序用来建立一个10*10矩阵,该矩阵两条对角线上的元素为1,其余元素为0,请补充完该程序。 该程序运行结果见下图。 Private Sub Form_ click() Dim s(10, 10) As Integer For n = 1 To 10 For m = 1 To 10 If【 】Or【 】Then s (n, m) = 1 Else s (n, m) = 0 End If Nex...
【简答题】Choose the best ending A-I to complete the sentences about employment. A twenty people in the last two years. B on without a formal interview. C because the company offered and excellent package. D yo...
【简答题】74LS273 通常用来作简单 接口扩展;而74LS244则常用来作简单 接口扩展。