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   44928篇
  免费   944篇
  国内免费   12篇
  2020年   299篇
  2019年   292篇
  2018年   3792篇
  2017年   3169篇
  2016年   2648篇
  2015年   542篇
  2014年   525篇
  2013年   2172篇
  2012年   1318篇
  2011年   3121篇
  2010年   2922篇
  2009年   1893篇
  2008年   2327篇
  2007年   2773篇
  2006年   633篇
  2005年   727篇
  2004年   692篇
  2003年   594篇
  2002年   579篇
  2001年   788篇
  2000年   864篇
  1999年   605篇
  1998年   300篇
  1997年   249篇
  1996年   225篇
  1992年   464篇
  1991年   420篇
  1990年   456篇
  1989年   426篇
  1988年   402篇
  1987年   410篇
  1986年   409篇
  1985年   424篇
  1984年   345篇
  1983年   306篇
  1982年   249篇
  1979年   396篇
  1978年   285篇
  1977年   260篇
  1976年   228篇
  1975年   351篇
  1974年   378篇
  1973年   356篇
  1972年   337篇
  1971年   292篇
  1970年   269篇
  1969年   324篇
  1968年   362篇
  1967年   326篇
  1966年   331篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
The aim of this study was to test the direction of effect in the relationship between parents' sources of knowledge (parental monitoring and child disclosure) and adolescent alcohol use. The participants were 215 adolescents and their mothers, randomly selected from urban and rural areas in Cyprus. A 3‐month, two‐timepoint longitudinal design was used in which adolescents completed the alcohol use disorders identification test while mothers completed a parental knowledge questionnaire. The results of this study showed that parental monitoring did not predict subsequent adolescent alcohol use. However, child disclosure at Time 1 negatively predicted adolescent alcohol use at Time 2. Moreover, adolescents' alcohol dependence symptoms at Time 1 negatively predicted both sources of parental knowledge at Time 2.  相似文献   
4.
5.
6.
Evaluated the effect of varied physician affect on subject recall, anxiety, and perceptions in a simulated tense and ambiguous medical situation. Forty women at risk for breast cancer viewed videotapes of an oncologist presenting--with either worried or nonworried affect--mammogram results. Although the mammogram results and the oncologist were the same in both presentation, analyses indicated that, compared to the women receiving the results from a nonworried physician, the women receiving the results from a worried physician recalled significantly less information, perceived the clinical situation as significantly more severe, reported significantly higher levels of state anxiety, and had significantly higher pulse rates. These results suggest that physician affect plays a critical role in patient reaction to medical information. Implications for compliance research, patient satisfaction, and physician training are discussed.  相似文献   
7.
OBJECTIVE: To test a theoretical model of how ethnic pride and self-control are related to risk and protective factors. DESIGN: A community sample of 670 African American youth (mean age = 11.2 years) were interviewed in households. MAIN OUTCOME MEASURES: Measures of cigarette smoking, alcohol use, and sexual behavior (lifetime to past month). RESULTS: Structural modeling analyses indicated parenting was related to self-control and self-esteem, and racial socialization was related to ethnic pride. Self-control and self-esteem variables were related to levels of deviance-prone attitudes and to perceptions of engagers in, or abstainers from, substance use and sexual behavior. The proximal factors (behavioral willingness, resistance efficacy, and peer behavior) had substantial relations to the criterion variables. Participant gender and parental education also had several paths in the model. Results were generally similar for the 2 outcome behaviors. CONCLUSIONS: In this population, self-esteem and self-control are related to parenting approaches and have pathways to attitudes and social perceptions that are significant factors for predisposing to, or protecting against, early involvement in substance use and sexual behavior.  相似文献   
8.
9.
10.
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