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   83797篇
  免费   3267篇
  国内免费   39篇
  87103篇
  2020年   883篇
  2019年   1088篇
  2018年   1575篇
  2017年   1526篇
  2016年   1682篇
  2015年   1139篇
  2014年   1417篇
  2013年   7703篇
  2012年   2456篇
  2011年   2632篇
  2010年   1591篇
  2009年   1572篇
  2008年   2431篇
  2007年   2322篇
  2006年   2094篇
  2005年   1853篇
  2004年   1809篇
  2003年   1734篇
  2002年   1706篇
  2001年   2622篇
  2000年   2535篇
  1999年   1934篇
  1998年   1003篇
  1997年   898篇
  1996年   952篇
  1995年   932篇
  1994年   886篇
  1993年   884篇
  1992年   1725篇
  1991年   1593篇
  1990年   1584篇
  1989年   1397篇
  1988年   1389篇
  1987年   1361篇
  1986年   1372篇
  1985年   1419篇
  1984年   1189篇
  1983年   1000篇
  1982年   817篇
  1979年   1139篇
  1978年   848篇
  1975年   1040篇
  1974年   1053篇
  1973年   1102篇
  1972年   1011篇
  1971年   903篇
  1970年   808篇
  1968年   1004篇
  1967年   928篇
  1966年   842篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
102.
103.
104.
105.
The principles, design considerations, and components of a clinical information system intended to support and enhance the patient care, educational, and research missions of a comprehensive psychiatric institute are presented. Major characteristics of the system are its emphases on efficiency, simplicity, and intensive user involvement throughout the development of the system.  相似文献   
106.
107.
Reading strategies for children and adults: a quantitative model   总被引:2,自引:0,他引:2  
  相似文献   
108.
This study provides evidence that the effects of perceived pervasive discrimination may be dynamic over time. It was expected that participants who perceived discrimination to be highly pervasive would initially be more likely to engage in inactive coping strategies than those who perceived low pervasiveness; however, those who continued to perceive high pervasiveness over time were expected ultimately to engage in more active strategies than those perceiving low pervasiveness. Using a 28-day diary, women and ethnic minorities described their daily experiences of discrimination and indicated their appraisals of its pervasiveness as well as their coping strategies. Results showed that participants who initially perceived low pervasiveness reported more active coping and religion use as well as less behavioral disengagement than those initially perceiving high pervasiveness. However, this pattern was reversed by the end of the study. Implications for integrating time into the assessment of coping with discrimination are discussed.  相似文献   
109.
Adherence to medications for chronic pediatric diseases decreases overtime. This randomized controlled trial evaluated a clinic-based, nurse-administered educational and behavioral intervention to prevent the anticipated drop in adherence to nonsteroidal medications among newly diagnosed patients with juvenile rheumatoid arthritis. Thirty-four participants completed the study (mean age = 8.44 years, SD = 3.96), including 19 in the experimental group and 15 in the standard-treatment (education) control group. There were significant group and Group x Time effects for adherence (assessed with an electronic monitor over a 13-month period) favoring the experimental group. In contrast, the groups did not differ significantly in disease activity or functional limitations. Factors that may have prevented detection of differences in these health parameters are dicussed.  相似文献   
110.
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