问题
单项选择题
If graph with d={1,1,1,1,2,2,4} as its degree sequence. What is the number of nonisomorphic spanning trees ( )
A．2
B．3
C．4
D．5
答案
参考答案：A
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If graph with d={1,1,1,1,2,2,4} as its degree sequence. What is the number of nonisomorphic spanning trees ( )
A．2
B．3
C．4
D．5
参考答案：A