单项选择题

以下程序段运行的结果是______。Dim a(-1 To 5) As BooleanDim flag As Booleanflag = FalseDim i As IntegerDim j As IntegerDo Until flag = True For i=-1 To 5 j=j+1 If a(i)= False Then a(i)= True Exit For End If If i = 5 Then flag = True End If NextLoopPrint j

A．20
B．7
C．35
D．8
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单项选择题
执行以下语句后显示结果为______。Dim x As IntegerIf x Then Print x Else Print x-1
A．1
B．0
C．-1
D．不确定
单项选择题
下列程序段的执行结果为 ______。A=0:B=0For I = -1 To -2 Step -1 For J = 1 To 2 B=B+1 Next J A=A+1Next IPrint A; B
A．2 4
B．-2
C．4
D．2
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