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   17721篇
  免费   535篇
各国政治   764篇
工人农民   779篇
世界政治   1474篇
外交国际关系   612篇
法律   10500篇
中国共产党   2篇
中国政治   81篇
政治理论   3868篇
综合类   176篇
  2020年   222篇
  2019年   272篇
  2018年   352篇
  2017年   423篇
  2016年   435篇
  2015年   307篇
  2014年   364篇
  2013年   1772篇
  2012年   424篇
  2011年   461篇
  2010年   354篇
  2009年   398篇
  2008年   470篇
  2007年   487篇
  2006年   480篇
  2005年   420篇
  2004年   430篇
  2003年   447篇
  2002年   410篇
  2001年   685篇
  2000年   622篇
  1999年   515篇
  1998年   293篇
  1997年   250篇
  1996年   209篇
  1995年   210篇
  1994年   255篇
  1993年   227篇
  1992年   344篇
  1991年   374篇
  1990年   329篇
  1989年   348篇
  1988年   319篇
  1987年   339篇
  1986年   340篇
  1985年   339篇
  1984年   288篇
  1983年   319篇
  1982年   256篇
  1981年   240篇
  1980年   182篇
  1979年   248篇
  1978年   166篇
  1977年   147篇
  1976年   131篇
  1975年   122篇
  1974年   137篇
  1973年   117篇
  1972年   112篇
  1971年   94篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
12.
In many states, legal representation for parents of dependent children is inadequate and can be a source of delays in securing permanency for children and unnecessarily protracted court proceedings. Often, such parents also face barriers to accessing services and independent evaluators. These issues are being addressed in the state of Washington through two approaches. The first is a successful enhanced legal representation program that has substantially improved case outcomes. The second is a statewide committee using innovative means to examine systemic responses to the challenges of the Adoption and Safe Families Act.  相似文献   
13.
14.
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   
15.
16.
17.
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   
18.
19.
A method has been developed on reverse phase high performance liquid chromatography for simultaneous determination of methyl, ethyl and isopropyl alcohols under refractive index detection using pure water as the mobile phase. A good separation has been achieved between these alcohols. Detector response was linear with a detection limit of 5 mg/100 ml. Recovery studies were performed by adding known amounts of methyl and ethyl alcohols to blood, lung and liver within the range 80–90%. The reproducibility of the results was always >90%. The quantitative distribution of methyl alcohol in postmortem body tissues and fluids has been reported in three cases of poisoning.  相似文献   
20.
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