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问题 多项选择题

关于短期成本曲线的说法，正确的有()。

A.总成本曲线从原点开始，并随产量的增加而逐步上升

B.总成本曲线从纵轴一个截点即产量为零时总成本等于固定成本的那个点开始，并随产量的增加而逐步上升

C.总可变成本曲线从原点开始，并随产量的增加而逐步上升

D.总可变成本曲线从纵轴一个截点即产量为零时总成本等于固定成本的那个点

E.总固定成本曲线是平行于横轴的一条直线

答案

参考答案：B, C, E

解析：本题考查考生对短期成本曲线图形的认识。参见教材第28页。

单项选择题 B型题

最容易导致周围循环衰竭的是（）

A.高渗性脱水

B.低渗性脱水

C.等渗性脱水

D.全身性水肿

E.水中毒
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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.

Which of the following would be the best title for this passage

A．Childhood Socializers

B．Norms & Role Models

C．Sources of Information

D．Agents of Socialization
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