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   1390篇
  免费   81篇
各国政治   58篇
工人农民   190篇
世界政治   78篇
外交国际关系   42篇
法律   808篇
中国共产党   1篇
中国政治   22篇
政治理论   262篇
综合类   10篇
  2023年   12篇
  2022年   11篇
  2021年   11篇
  2020年   37篇
  2019年   50篇
  2018年   62篇
  2017年   70篇
  2016年   56篇
  2015年   64篇
  2014年   64篇
  2013年   188篇
  2012年   62篇
  2011年   84篇
  2010年   44篇
  2009年   63篇
  2008年   78篇
  2007年   62篇
  2006年   71篇
  2005年   49篇
  2004年   39篇
  2003年   41篇
  2002年   33篇
  2001年   37篇
  2000年   18篇
  1999年   17篇
  1998年   21篇
  1997年   15篇
  1996年   7篇
  1995年   6篇
  1994年   10篇
  1993年   7篇
  1992年   7篇
  1991年   5篇
  1990年   6篇
  1988年   4篇
  1987年   5篇
  1986年   3篇
  1985年   5篇
  1984年   7篇
  1983年   4篇
  1981年   3篇
  1980年   4篇
  1979年   3篇
  1977年   3篇
  1976年   3篇
  1974年   4篇
  1973年   2篇
  1971年   2篇
  1970年   3篇
  1967年   2篇
排序方式: 共有1471条查询结果,搜索用时 46 毫秒
151.
In this issue Andrés Guadamuz explains the recent troubledhistory of the attempts that have been made to ensure the harmoniousoperation of Europe's software patent laws, and of the sad fateof those attempts. There is something paradoxical about thefact that the attempts at reform were scotched by two opposingcamps consisting of those who stood to gain most from thosereforms: on the one side those who want strong software patentsand on the other those who want no patents at all. At  相似文献   
152.
153.
An earlier registered trade mark may serve to oppose a laterapplication to register a Community trade mark, notwithstandingthat the earlier mark is not used in the form in which it isregistered, so long as the actual use had not destroyed thedistinctive character of the earlier mark.  相似文献   
154.
155.
156.
157.
Predictors of engagement in mothers receiving home visitation in the first year of service was examined. Early engagement was studied in three ways: (1) length of time active in the program during the first year of service (duration), (2) number of visits received (quantity), and (3) gaps in service between visits (consistency). Examined visits received in 515 first-time mothers in a Healthy Families America (HFA) program. Parameters of engagement were investigated, and predictors of engagement were identified using demographics and the Kempe Family Stress Inventory. Inclusive of the Assessment Visit, 31.8% of mothers disengaged prior to the first month of service. Remaining active in the program was associated with being Caucasian, and increased parenting risk (mental health/substance abuse history, low social support, increased stress). Most mothers had fewer home visits than prescribed. Gaps in prescribed service were common, with 89.4% of mothers experiencing gaps between visits of 1 month, and dropping to 16.4% having gaps of 2 months. In contrast to findings from clinic-based interventions, early engagement in home visitation is associated with lower levels of functioning and acute needs. These findings add to a growing body of literature suggesting that increased adversity promotes engagement in prevention programs in general, and home visitation programs in particular. To the extent that mothers who are actively engaged in home visitation are likely to have increased psychosocial needs, curricula may require modification and augmentation to address these needs and optimize program effectiveness.  相似文献   
158.
Barrett J 《Newsweek》2006,148(10):67-68
  相似文献   
159.
160.
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