选择题:“一个联通的点线图可以一笔画”的充分必要条件是:

题目内容:

“一个联通的点线图可以一笔画”的充分必要条件是

A.点线图中的奇结点为2个或者0个

B.点线图中的奇结点为2个、1个或者0个

C.点线图中的奇结点不多于2个

D.点线图中的奇结点为2个

参考答案:

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