首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1692篇
  免费   120篇
各国政治   165篇
工人农民   109篇
世界政治   179篇
外交国际关系   112篇
法律   883篇
中国共产党   2篇
中国政治   34篇
政治理论   293篇
综合类   35篇
  2023年   23篇
  2022年   17篇
  2021年   39篇
  2020年   54篇
  2019年   65篇
  2018年   99篇
  2017年   137篇
  2016年   104篇
  2015年   76篇
  2014年   89篇
  2013年   242篇
  2012年   75篇
  2011年   68篇
  2010年   39篇
  2009年   39篇
  2008年   69篇
  2007年   68篇
  2006年   62篇
  2005年   62篇
  2004年   62篇
  2003年   65篇
  2002年   57篇
  2001年   41篇
  2000年   28篇
  1999年   18篇
  1998年   12篇
  1997年   17篇
  1996年   5篇
  1995年   8篇
  1994年   4篇
  1993年   5篇
  1992年   8篇
  1991年   6篇
  1990年   2篇
  1989年   2篇
  1988年   5篇
  1987年   3篇
  1985年   3篇
  1983年   2篇
  1982年   5篇
  1978年   3篇
  1974年   2篇
  1972年   2篇
  1971年   3篇
  1970年   1篇
  1968年   4篇
  1967年   2篇
  1966年   3篇
  1965年   1篇
  1964年   1篇
排序方式: 共有1812条查询结果,搜索用时 31 毫秒
171.
172.
目前,校园网络的安全防范技术以防火墙技术、入侵检测技术以及防病毒技术为主流,它们对校园网内的安全防护起了重要的作用。但这三种措施并不能完全彻底的保护校园内网的安全,今后,还需我们不断努力,建立一个完善、全面、可靠、实用的网络病毒防御系统。  相似文献   
173.
Abstract: Recent case-law of the Court of Justice on general interest exceptions to the free provision of services has indicated a flexible approach to general interest exceptions involving moral or ethical issues. In contrast, where the general interest exception is relied on in a case which demonstrates predominantly economic issues, it is subject to strict scrutiny, in particular, with reference to the principle of proportionality. The article analyses the Court's case-law and tries to deduce the criteria which now govern the Court's position. It also highlights difficulties which this two-tier approach may excite. The position of the Court of Justice reflects the lack of homogeneous European ethical and moral standards, but it also underlines the predominantly economic character of European integration to date. It is submitted, nevertheless, that divorcing the economic criteria for integration from general ethical considerations will prove an extremely difficult, if not fruitless, task.  相似文献   
174.
175.
The family is one of the major socialization agencies for children. Parents are one of the most important models from whom the child and adolescent acquire a wide variety of behavior patterns, attitudes, values, and norms. The aim of this study was to determine the importance of factors related to family conflicts in the genesis of social maladjustment. A total of 189 young people (110 boys and 79 girls) from training schools connected with the juvenile court in Murcia (Spain) were studied. The subjects' ages ranged from 11 to 18 years (mean 13.51, SD 0.16). Our sample comprised a group of minors who experienced a high incidence of intrafamilial pathology, which was found to be a significant discriminant factor. Aggressive behavior, rules, norms, values, opinions, and attitudes toward aggressivity can be learned in the family setting.  相似文献   
176.
177.
178.
179.
This study explored the sense of community among women (n = 21) and women with children (n = 30) living in Oxford Houses, with emphasis on how the presence of children might affect the household. Sense of community did not vary between participants with more or less than three months residence. Residents reported very high levels of satisfaction with the home, possibly because of a ceiling effect of little room for increases in their sense of community over time. Participants reported that they were getting along with the children in the home, that mothers could count on babysitting help, and that the children had a positive effect on the household and their own recovery process. This effect did not differ between mothers and non-mothers, suggesting that non-mothers might view the children in the home with a sense of responsibility and sensitivity comparable to that of the mothers. Implications are discussed.  相似文献   
180.
The average exclusion probability is a measure of efficiency in paternity testing; it refers to the a priori ability of a battery of tests to detect paternity inconsistencies. This parameter measures the capacity of the system to detect a false accusation of paternity. Traditionally, this average exclusion probability has been estimated as the probability of excluding a man who is not the father by an inconsistency in at least one of the studied loci. We suggest that this criterion should be corrected, as currently the presumed father is excluded when at least three genetic inconsistencies are found with the child being tested, not just one. This change of criterion has occurred because of the use of microsatellite loci, whose mutation rates are much greater than those of the coding genes used previously in paternity studies. We propose the use of the average probability of exclusion for at least three loci (not only one), as an honest measure of the combined probability of exclusion of several loci, and we propose an algebraic expression to calculate it.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号