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   59978篇
  免费   2199篇
  国内免费   27篇
  2020年   622篇
  2019年   752篇
  2018年   976篇
  2017年   1070篇
  2016年   1129篇
  2015年   821篇
  2014年   975篇
  2013年   4546篇
  2012年   1797篇
  2011年   1817篇
  2010年   1160篇
  2009年   1127篇
  2008年   1647篇
  2007年   1602篇
  2006年   1420篇
  2005年   1312篇
  2004年   1234篇
  2003年   1188篇
  2002年   1218篇
  2001年   1734篇
  2000年   1671篇
  1999年   1263篇
  1998年   599篇
  1997年   586篇
  1992年   1125篇
  1991年   1030篇
  1990年   1093篇
  1989年   993篇
  1988年   984篇
  1987年   954篇
  1986年   995篇
  1985年   970篇
  1984年   869篇
  1983年   806篇
  1982年   587篇
  1981年   613篇
  1979年   946篇
  1978年   680篇
  1977年   599篇
  1976年   571篇
  1975年   815篇
  1974年   909篇
  1973年   940篇
  1972年   758篇
  1971年   748篇
  1970年   692篇
  1969年   752篇
  1968年   893篇
  1967年   837篇
  1966年   762篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
191.
In this study the authors compared women's and men's reactions to various professional travel situations. A multivariate analysis of covariance was used to determine the effects of sex, professional role, and years traveling on the perceptions of these travel situations.  相似文献   
192.
The present study demonstrates the safety and effectiveness of an outpatient program designed to respond to adolescent-precipitated crises by mobilizing and restructuring the family's kinship system. Families of 75 adolescents at risk for hospitalization were followed up to 24 months after treatment with Systemic Crisis Intervention. Measures of offspring and family functioning, suicidal behavior, institutional use, and treatment costs are presented. Results clearly demonstrate the safety, effectiveness, and economic viability of Systemic Crisis Intervention.  相似文献   
193.
Depressed affect and time perception   总被引:1,自引:0,他引:1  
  相似文献   
194.
195.
196.
197.
The startle probe response: a new measure of emotion?   总被引:17,自引:0,他引:17  
  相似文献   
198.
The Family System Functioning (FSF) scale is a new instrument for measuring dimensions of the intrafamilial environment thought to be important in recovery from major psychiatric illness. Modest statistical correlations were obtained when FSF ratings of laboratory-based family interactions were compared with researcher-guided therapist ratings of FSF based upon the family's behavior in family therapy sessions during the subsequent month. The data from these two settings provide support for the validity of some of the scales. Because of the modest size of the correlations, however, behavior in the laboratory setting may not always be an accurate indicator of how the family will behave in the early weeks of family therapy.  相似文献   
199.
Through school-sponsored health fairs, 398 adolescents (153 males and 245 females) between the ages of 14 and 18 completed a questionnaire on their compliance with six of the U.S. Dietary Guidelines. Results indicated that adolescents report highest compliance on "eat a variety of foods" and "eat foods with adequate starch and fiber." Conversely, they indicated low compliance on "reduce sugar intake" and "reduce fat, saturated fat and cholesterol intake." Sex differences were noted on two dietary guidelines. Females reported lower compliance with respect to "maintain desirable body weight." Males, on the other hand, reported lower compliance than females on "reduce salt intake." Given the fact that the dietary guidelines of "reduce fat, saturated fat and cholesterol," "maintain desirable body weight," and "reduce salt intake" are all aimed at reducing cardiovascular risk, the low compliance reported by adolescents may have long-range health implications.  相似文献   
200.
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