问题 单项选择题

蛛网理论的假定条件之一是()。

A.需求量对价格缺乏弹性

B.供给量对价格富有弹性

C.需求者改变了对未来的价格预期

D.本期价格决定下一期产量

答案

参考答案:D

解析:本题考查蛛网理论的假设条件。其假设条件有两个:本期供给量决定本期价格,本期价格决定下一期产量。

多项选择题
单项选择题

The first and most important agents of socialization are the people who care for infants. In the earliest months, messages from nurturers constitute the child’’s basic understanding of the world around it. This is the infant’’s first introduction to the language that shapes perception and elicits emotion.Another powerful source of information and socialization is the friendship of peers. Peers are equals that one can deal with on the same level as oneself, whereas parents are superiors. The heavy emotional overlay of family relationships makes some kinds of learning difficult.Much formal socialization is placed in the hands of professionals. Teachers from kindergarten on are specifically designated agents of socialization. Ideally, a teacher is one who has both knowledge and the skills to present it. During the course of teaching their subjects, classroom instructors provide role models and attempt to convey the excitement of learning itself.In earlier times, parents, friends and teachers would comprise the list of primary childhood socializers. Children’’s books, comics and magazines might also have been mentioned as sources of information on norms and role models. Today one must add three powerful indirect or non-personal socialization agents: radio, movies and television. Many people learn about politics, form a vision of well-being, and develop attitudes towards others from what they see on the screen and hear through the speakers.

In this passage, agents of socialization refer to________.

A.the media

B.individuals

C.all channels

D.organizations