问题
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
答案
参考答案：D
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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
参考答案：D