单选题:In an undirected graph, the sum of degrees of all the vertices i
In an undirected graph, the sum of degrees of all the vertices is __ times the number of edges. @[C](2)
A. 1/2
B. 1
C. 2
D. 4
A.1/2
B.1
C.2
D.4
答案:C
A. 1/2
B. 1
C. 2
D. 4
A.1/2
B.1
C.2
D.4
答案:C