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   31989篇
  免费   1564篇
各国政治   1357篇
工人农民   1405篇
世界政治   2422篇
外交国际关系   1092篇
法律   20420篇
中国共产党   4篇
中国政治   174篇
政治理论   6420篇
综合类   259篇
  2021年   159篇
  2020年   592篇
  2019年   646篇
  2018年   842篇
  2017年   895篇
  2016年   1005篇
  2015年   719篇
  2014年   815篇
  2013年   3336篇
  2012年   822篇
  2011年   866篇
  2010年   812篇
  2009年   861篇
  2008年   877篇
  2007年   898篇
  2006年   889篇
  2005年   769篇
  2004年   795篇
  2003年   714篇
  2002年   731篇
  2001年   1183篇
  2000年   1094篇
  1999年   886篇
  1998年   495篇
  1997年   394篇
  1996年   373篇
  1995年   377篇
  1994年   404篇
  1993年   378篇
  1992年   575篇
  1991年   610篇
  1990年   584篇
  1989年   566篇
  1988年   565篇
  1987年   550篇
  1986年   588篇
  1985年   590篇
  1984年   497篇
  1983年   480篇
  1982年   397篇
  1981年   368篇
  1980年   307篇
  1979年   430篇
  1978年   260篇
  1977年   222篇
  1976年   195篇
  1975年   210篇
  1974年   239篇
  1973年   183篇
  1972年   183篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
Fibres used in forensic casework suffer from a disadvantage common to other forms of trace evidence--it is not possible to state with absolute certainty that they originate from a specific source. Target fibre studies, population studies and research on 'blocks of colour' have effectively demonstrated the polymorphism of textile fibres (particularly man-made ones) and have shown that when a fibre is believed to have a specific putative source, the chance that it has originated from a different source purely by coincidence is extremely remote. A study by Houck MM (Houck MM, Inter-comparison of unrelated fibre evidence. Forensic Science International 2003; 135: 146-149) has shown that no coincidental matching fibres were recovered from items of clothing examined in 20 unrelated crimes. The study involved over two million comparisons. This work goes a step further, and using the example of blue polyester fibres shows that even within a very narrow segment of the whole general fibre population, many examples of a specific colour/type of man-made fibre taken from random sources can be compared and the chance of any two being the same is very low. These studies should help to show the specificity and value of transferred fibres in providing forensic evidence.  相似文献   
32.
33.
Book Reviews in This Article:
Robert Jay Lifton, The Nazi Doctors: Medical Killing and the Psychology of Genocide.
Eric Stovcr and Elena O. Nightingak, eds., The Breaking of Bodies and Minds: Torture, Psychiatric Abuse and the Health Professions.
Elliot S. Valenstein, Great and Desperate Cures: The Rise and Decline of Psychosurgery and Other Related Treatments for Mental Illness.  相似文献   
34.
35.
Unwanted sexual attention (UWSA) encompasses unsolicited verbal comments, gestures, stares, and other noncontact behaviors made regarding one's sexuality and physical appearance. The present study examined the correlates and impact of such UWSA perpetrated toward girls by family members. The first objective of the study was to explore whether family climate is associated with intrafamilial UWSA. This included looking at three types of dysfunctional parenting styles (unaffectionate, unavailable, and patriarchal) as well as exploring the co-occurrence of UWSA by adult and child relatives. The second objective was to then measure the impact of such intrafamilial UWSA on childhood emotional health, after controlling for parenting style and the experience of more traditional forms of child sexual abuse (CSA). Of the 296 university women (mean age = 19) who participated in the study, 70% (N = 206) reported UWSA from a family member prior to age 18. Whereas each dysfunctional parenting style was related to presence of UWSA, a simultaneous multiple regression analysis indicated that two of the parenting styles, patriarchal and parental unavailability, also predicted frequency of nonphysical UWSA within the family. Presence of UWSA from a child relative was significantly correlated with presence of UWSA from an adult relative. Additionally, a hierarchical multiple regression, entering the three parenting styles simultaneously in the first step, childhood sexual abuse in the second step, and familial UWSA in the last step, indicated that the frequency of UWSA by family members significantly predicted poorer childhood mental health when controlling for the other variables. Overall, results indicate that while the specific parenting styles which co-occur with UWSA may be detrimental in their own right, the impact of UWSA on girls appears to be above and beyond that of either parenting styles or CSA. Clinical implications are discussed.  相似文献   
36.
37.
38.
39.
Das Bundesverwaltungsgericht hat in seinem Urteil vom 16.3.2006 zum Gro?flughafen Berlin-Brandenburg in einem Leitsatz festgestellt, dass das FFH-Schutzregime, dem bestimmte Biotope unterliegen, sich nicht auf V?gel erstreckt, denen das betreffende Biotop als Habitat dient. Diese Feststellung führt zu der Frage, inwieweit charakteristische Arten von Lebensr?umen nach Anhang I FFH-RL in der FFH-Vertr?glichkeitsprüfung nach § 34 BNatSchG überhaupt bewertungsrelevant sind. Der Beitrag setzt sich dazu mit dem Urteil kritisch auseinander.  相似文献   
40.
In this commentary, the call for clinical humility and judicial vigilance in custody recommendations is confirmed as valid and the Australian experience, where the child custody report writer has for some years been permitted to express an opinion on the ultimate issue, is considered. The inherent risks are briefly discussed, and the question of who of the judge and the social scientist might be better placed to decide the exquisitely difficult children's issues after family breakdown is touched upon. It suggests that a combination of the expert's opinion and judicial fact finding probably produces a result that is as good as it gets. But a greater danger is highlighted. It is the impact of the adversary system, and whether it is suitable in any event to these sensitive court decisions.  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