题目内容

“Among so many well-dressed and cultured people, the country girl felt like a fish out of water.”In this sentence,"like a fish out of water" means______________________.

A. be surprised
B. be crazy
C. be exciting
D. be upset

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已知图的邻接矩阵为:当用邻接表作为图的存储结构,且邻接表都按序号从大到小排序时,则以顶点V1为出发点的深度优先遍历序列是?

A. V1V2V4V6V8V10V9V7V5V3
B. V1V2V3V4V5V6V7V8V9V10
C. V1V3V2V4V5V7V6V9V8V10
D. V1V2V5V3V4V9VV6V8V10V7

已知图的邻接矩阵为:当用邻接表作为图的存储结构,且邻接表都按序号从大到小排序时,则以顶点V1为出发点的广度优先遍历序列是?

A. V1V2V3V4V5V6V7V9V8V10
B. V1V2V3V4V5V6V7V8V9V10
C. V1V2V4V6V8V10V9V7V5V3
D. V1V3V5V7V9V2V4V6V8V10

下面哪一方法可以判断出一个有向图是否有环(回路): ( )

A. 深度优先遍历
B. 拓扑排序
C. 求最短路径
D. 求关键路径

在有向图的邻接矩阵表示中,计算第i个顶点入度的方法是第i 元素之和。

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