安装拆卸电梯井内安全平网时，作业人员应按规定佩戴（）。A、安全网 B、安全带 C、安全帽

关于蜕膜的概念，正确的是（）。

A.孕卵着床后，子宫内膜发生蜕膜变化

B.覆盖在囊胚上面的蜕膜称为真蜕膜

C.与极滋养层接触的蜕膜称为包蜕膜

D.除真蜕膜、包蜕膜外覆盖在子宫腔内的蜕膜为底蜕膜

E.蜕膜是发育成熟的胎盘的母体部分

活髓牙全冠粘固后很快出现过敏性疼痛，其主要原因是（）

A.预备体表面过分吹干

B.粘固剂刺激

C.腐质未去净

D.消毒剂刺激

E.冠试戴时刺激

二进制数11000000对应的十进制数是

A．384

B．192

C．96

D．320

法律法规规定企业在生产活动中，职业健康安全和环境保护必须满足法律法规所规定的最低限度要求，并规定了安全认证和许可、______等制度。

A．操作规程
B．资源控制
C．资源配置
D．事故处理

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 author’s chief agents include the following EXCEPT the________.

A．family

B．group

C．school

D．internet