题目内容
（请给出正确答案）
[单选题]
4、结点数为奇数且所有结点的度数也为奇数的连通图必定是（)。
A.简单图
B.线图
C.多重图
D.不存在的
答案
D、不存在的
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A.G的所有结点的度数全为偶数。
B.G中所有结点的度数全为奇数。
C.G连通且所有结点度数全为奇数。
D.G连通且所有结点度数全为偶数。
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