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人体缺乏脂肪酸就会发生皮肤病、生育反常及乳汁分泌减少等现象。
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活动目录(Active Directory)是由组织单元、域、 (31) 和域林构成的层次结构，安装活动目录要求分区的文件系统为 (32) 。
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 (21) on the individual suggest that children engage in criminal behavior (22) they were not sufficiently penalized for previous misdeeds or that they have learned criminal behavior through (23) with others. Theories focusing on the role of society suggest that children commit crimes in (24) to their failure to rise above their socioeconomic status, (25) as a rejection of middle-class values. Most theories of juvenile delinquency have focused on children from disadvantaged families, (26) the fact that children from wealthy homes also commit crimes. The latter may commit crimes (27) lack of adequate parental control. All theories, however, are tentative and are (28) to criticism. Changes in the social structure may indirectly (29) juvenile crime rates. For example, changes in the economy that (30) to fewer job opportunities for youth and rising unemployment (31) make gainful employment increasingly difficult to obtain. The resulting discontent may in (32) lead more youths into criminal behavior. Families have also (33) changes these years. More families consist of one-parent households or two working parents; (34) , children are likely to have less supervision at home (35) was common in the traditional family structure.
根据物权法的规定，下列各项中，有关无权占有人与返还请求权人之间产生的法律后果，正确的表述是( )。
Linux中一种常用的引导工具是 (8) ；在Linux操作系统下安装网卡，如果操作系统没有内置的驱动程序，那么用户必须 (9) ，才能完成驱动程序的安装；为一块设备名为eth0的网卡分配IP地址和子网掩码的命令是： (10) ；如果不打算使用DNS或者NIS进行地址解析，则必须将所有的主机名都放入文件 (11) 中；测试与IP地址为165.113.1.170的网关是否连通的命令是： (12)
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