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散客旅游的旅游项目价格相对较贵，因为每个旅游项目散客都按______价格支付，而团队旅游在某些旅游项目上可享受______优惠，因而相对较为便宜。

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参考答案：零售 折扣

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.

The child’s basic understanding of the world around it is formed________.

A．at kindergarten

B．in the earliest months

C．by classroom instructors

D．through interaction with parents
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单项选择题

儿童颌骨骨折治疗原则错误的是（）

A.尽早复位

B.固定时间较成人短

C.尽可能采用保守治疗

D.必须恢复伤前的咬合关系

E.如要手术治疗，术中应避免损伤牙胚
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