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问题 单项选择题

勒纳认为造成勒纳特例的原因是进口国对进口产品有两种性质不同的需求：（）。

A.一种是对产出品的需求；另一种是投入品的需求，两者相互影响

B.一种是市场经济的需求，另一种是计划经济的需求，两者是相互矛盾的

C.一种是一般需求，这种需求受市场规律支配；另一种是进口国政府的需求，这种需求不受市场规律支配

D.一种是进口国政府的需求，这种需求受市场规律支配；另一种是一般需求，这种需求不受市场规律支配

答案

参考答案：A

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.

According to this passage, ________makes some kind of learning difficult.

A．long distance

B．formality

C．much indulgence

D．family influence
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单项选择题

安全状况等级定为4级的压力容器，其累积监控时间（）

A、一般不超过3年

B、不得超过2年

C、不得超过3年
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