题目内容

在下列情况中，可称为二叉树的是( )。【西安交通大学1996三、4(3分)】

A. 每个结点至多有两棵子树的树
B. 哈夫曼树
C. 每个结点至多有两棵子树的有序树
D. 每个结点只有一棵右子树
E. 以上答案都不对

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Questions 4 to 6 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions. Now listen to the conversation. Why is the woman surprised in the beginning

A. The man is carrying some flowers.
B. The man has spoiled his marriage anniversary.
C. The man seems very excited about meeting his wife.
D. The man is horsing around.

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In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow. Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now listen to the passage. What does the professor say about the invention of the elevator

A. It created design problems for architects.
B. It was needed for transporting construction materials.
C. It enabled architects to design taller office buildings.
D. It made skyscrapers more expensive to build.

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哈夫曼树的结点个数不能是偶数。（）

A. 正确
B. 错误

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一棵哈夫曼树的带权路径长度等于其中所有分支结点的权值之和。( )【合肥工业大学2000二、4(1分)】【烟台大学2007二、7(1分)】

A. 正确
B. 错误

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在下列情况中，可称为二叉树的是( )。 【西安交通大学1996三、4(3分)】

A. 每个结点至多有两棵子树的树 B. 哈夫曼树 C. 每个结点至多有两棵子树的有序树 D. 每个结点只有一棵右子树 E. 以上答案都不对

Questions 4 to 6 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions. Now listen to the conversation. Why is the woman surprised in the beginning

哈夫曼树的结点个数不能是偶数。（）

一棵哈夫曼树的带权路径长度等于其中所有分支结点的权值之和。( )【合肥工业大学2000二、4(1分)】【烟台大学2007二、7(1分)】

在下列情况中，可称为二叉树的是( )。【西安交通大学1996三、4(3分)】

A. 每个结点至多有两棵子树的树
B. 哈夫曼树
C. 每个结点至多有两棵子树的有序树
D. 每个结点只有一棵右子树
E. 以上答案都不对