题目内容

一个连通图中的最小生成树是唯一的。

A. 对
B. 错

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图论中的图不仅反映了研究对象之间的关系，而且是真实图形的写照，因而对图中点与点的相对位置、点与点连线的长短曲直等都要严格注意。

A. 对
B. 错

网络最短路问题和网络最小树问题实质是一个问题。

A. 对
B. 错

When we were kids, we went to Beijing for our holidays, but I _______ there for years.

A. have not been
B. am
C. have been
D. had been

We lived in Hunan from 1995 to 2001, but we _______ to Hainan now.

A. have moving
B. have moved
C. moved
D. was going to move