单项选择题

What is the definition of a Path ( )

A．a sequence of vertices and the edges formed by each successive pair of vertices
B．a walk with distinct edges
C．a walk with distinct vertices
D．none of the above
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单项选择题
设T为n(n≥3)阶无向树，T有几条割边( )
A．n条
B．n-2条
C．n-1条
D．没有
单项选择题
When the adjacency list method is used to store a graph, which of the statements is (are) true ( )
A．None
B．Ⅰ only
C．Ⅱ only
D．Ⅰ and Ⅱ
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