【单选题】早期的空分交换网络采用的是()开关接点。
【单选题】Which of the following statements best describes demodulation?
A.
Detuning the receiver to remove interfering signals.
B.
Removing atmospheric noise from the signal.
C.
Removing the information signal from the carrier.
D.
Separating the telex signals from the voice signals.
【多选题】下列说法正确的是( )
B.
O2O的消费者到现场获得服务,涉及客流;;B2C的消费者待在办公室或家里,等货上门,涉及物流;
【单选题】在下列各种编码中,每个字节最高位均是 "1" 的是 。
【单选题】A: Information Service. This is Fantasia. What is the position of tropical storm Helen? Over.B: Fantasia. This is Information Service. Tropical storm Helen is in position 15°20’S,160°32’E. You shoul...
【单选题】在窗体上放置一个命令按钮,然后编写以下事件过程: Private Sub Command1_Click() Dim x(1 To 5)As Integer For k = 1 To 5 x(k)= 10 - k Next k Print x(x(k - 3)- 3) End Sub 运行程序后,单击命令按钮,输出结果是________。
【单选题】假定有以下函数过程: Function Fun(S As String) As String Dim s1 As String For i=1 tolen(s) S1=UCase(mid(s,i,1))+s1 Next i Fun=s1 End Function 在窗体上画一个命令按钮,然后编写如下事件过程: Private Sub Command1-Click( ) Dim Str1 ASStr...
【单选题】在窗体上有一个命令按钮,有以下单击事件,程序运行后,单击命令按钮,分别输入1和3,则输出结果为( )。 Private Sub Command1_Click() dim a,b a=InputBox("Enter the first number") b=InputBox("Enter the second number") print a+b End Sub