实验三和实验四

具有n个顶点的完全有向图的弧数为（）

A. n（n-1）/2
B. n（n-1）
C. n*n
D. n*n-11-

下列算法中，（）算法用来求图中某顶点到其他所有顶点之间的最短路径

A. Dijkstra
B. Floyed
C. Prim
D. Kruskal

建立在有感染力的真实事件或真实问题基础上的教学被称为（ ）。

A. 支架式教学
B. 情景教学
C. 探索学习
D. 合作学习

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