对二叉树以根结点为起点进行广度优先遍历，类似于二叉树的__________。
A. 先序遍历
B. 中序遍历
C. 后序遍历
D. 层次遍历
查看答案
图的深度优先遍历可以视为一个递归过程。
A. 对
B. 错
What’s the man doing?[音频]
A. Studying Chinese.
B. Doing a Chinese test.
C. Reviewing his Chinese lessons.
What’s Tom going to do?[音频]
A. Write a history paper for the woman.
B. Help the woman with her history lesson.
C. Help the woman finish her history paper.
D. Tell the woman how to write a history paper quickly.
What’s the man looking for?[音频]
A. The English Department.
B. The French Department.
C. The German Department.
D. he school library.
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