对线性表中的数据元素进行（）和（）等操作，实现表的长度的增长或缩短。
A. 插入
B. 遍历
C. 访问
D. 删除
线性表(含n个元素)的基本运算之一是删除第i个元素,其中i的有效取值范围是0<=i<=n-1
A. 对
B. 错
Elements or attributes of learning environment do not contain:
A. situation
B. cooperation
C. conversation
D. meaning construction
The roles of teachers include:
A. Stimulate students' interest in learning, and help students form learning motivation.
B. Collect and analyze relevant information and data.
Create the teaching content of situation and prompt clues of communicationbetween old and new knowledge.
D. Guide the cooperation learning process.
E. Reflect the content of the current study things associated with what students already know.
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