每个报警阀组供水的最高与最低位置喷头,其高程差不宜大于()m.
A.30
B.40
C.50
D.60
参考答案:C
有如下程序。 Private Sub Command1_Click() Dim k As Integer,m As Integer Dim op As Integerk=4:m=1Op=PPC(k,m):Print op;Op=PPC(k,m):Print op End Sub Private Function PPC(a As Integer,b As Integer) Static m As Integer,i As Integerm=0:i=2i=i+m+1m=i+a+bPPC=m End Function 程序运行后,输出的结果为
A) 4 6 B) 6 6 C) 8 8 D) 10 12
哪些用户不可办理IVPN业务()
A.虚拟网用户
B.中继用户
C.NGN用户
D.普通直线用户