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Visual Basic:Which of the following segments will call the m

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Visual Basic:Which of the following segments will call the method ReadData four times?
Which of the following segments will call the method ReadData four times?_____
A) Dim k As Integer
k = 1
While k 4
ReadData()
k = k + 1
End While
B) Dim i As Integer
i = 0
While i
答案是b,在0,2,3,4的时候被调用.1的时候返回while处,没被调用.