设一棵满二叉树中,度为2的结点数为7,则该二叉树的全部结点可能为( )。 Ⅰ.9

题型:单项选择题

问题:

设一棵满二叉树中,度为2的结点数为7,则该二叉树的全部结点可能为( )。
Ⅰ.9 Ⅱ.14 Ⅲ.15

A.Ⅰ
B.Ⅲ
C.Ⅱ或Ⅲ
D.都可能

考点:计算机等级考试数据库技术三级数据库技术笔试
题型:单项选择题

“斧斤以时入山林,材木不可胜用也”。提出不过分捕捞鱼鳖,要按时令进山伐树这一相互生态环境观的是:(     )

A.孔子

B.老子

C.孟子

D.墨子

题型:单项选择题

I have a friend. His name is Jack. ③He is healthy because(因为) he plays sports. He runs every day. He runs to his ___①____ in the morning and he runs ____②____ after school in the afternoon. He can run fast. He likes playing soccer, volleyball, tennis, basketball , ping-pong and more. He has three soccer balls, two volleyballs, six tennis rackets, four basketballs and many ping-pong balls. They are in his room. He plays sports with his friends every day. He likes many sports stars and he often watches them on TV. All my classmates say Jack is sporty (爱好体育)。

小题1:根据短文内容在①②处各填一词。

___________   ______________

小题2:划线单词them指___________ ___________

小题3:根据短文内容回答问题。Where are Jack’s volleyballs? __________________________________________________________________

小题4:把③译成汉语。

_________________________________________________________________

小题5:在文中找出文章的标题。

__________________________________________________________________

题型:单项选择题

Students ________ remain in their seats until all the papers have been collected. [ ]

A. may

B. shall

C. need

D. can

题型:单项选择题

世界贸易组织协议条款规定,成员可以采用反倾销、反出口补贴等措施,体现的基本原则是()

A.贸易自由化原则

B.非歧视性原则

C.促进公平竞争原则

D.透明度原则

题型:单项选择题

相对于非关系模型,关系数据模型的缺点之一就是( )。

A.数据独立性高

B.存取路径对用户透明,需进行查询优化

C.数据结构简单

D.有严格的数学基础

更多题库