边际效用基数论及序数论

Many theories concerning the causes of juvenile delinquency (crimes committed by young people) focus either on the individual or on society as the major contributing influence. Theories (51) on the individual suggest that children engage in criminal behavior (52) they were not sufficiently penalized for previous misdeeds or that they have learned criminal behavior through (53) with others. Theories focusing on the role of society suggest that children commit crimes in response to their failure to rise above their socioeconomic status, (54) as a rejection of middle-class values. Most theories of juvenile delinquency have focused on children from disadvantaged families, ignoring the fact that children from wealthy homes also commit crimes. The latter may commit crimes (55) lack of adequate parental control. All theories, however, are tentative and are (56) to criticism. Changes in the social structure may indirectly (57) juvenile crime rates. For example, changes in the economy that lead to fewer job opportunities for youth and rising unemployment (58) make gainful employment increasingly difficult to obtain. The resulting discontent may in turn lead more youths into criminal behavior. Families have also (59) changes these years. More families consist of one-parent households or two working parents; consequently, children are likely to have less supervision at home (60) was common in the traditional family structure. This lack of parental supervision is thought to be an influence on juvenile crime rates.

60().

A.than 

B.that 

C.which 

D.as

Intel 8086为16位CPU，共有20条地址线，它的内部通用寄存器是______位，它相应的最大寻址空间是______。

在历史课上，关于欧洲的浪漫主义，引起了一场争论，下列哪位同学的说法不正确 [ ]

A．甲说：浪漫主义是由卢梭开始，他是浪漫主义之父，我喜欢卢梭

B．乙说：卢梭认为原始社会最美好，知识的进步有害于人类的幸福，照这个说法，你回到原始森林去好了

C．丙说：你们两个不要吵了，科学本身就是一把“双刃剑”，你们都只看到了一面

D．丁说：我也喜欢浪漫主义，但我认为浪漫主义并不排斥现代科技

下列属于以工作为导向的薪酬结构的是（）。

A.薪酬随着职务（或岗位）的变化而变化

B.岗位工资制

C.职务工资制

D.技能或能力工资

E.效益工资

正在项目建设期间的建设单位，其保管期满的会计档案也不得销毁。（）