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   24898篇
  免费   903篇
  国内免费   11篇
  2020年   308篇
  2019年   290篇
  2018年   465篇
  2017年   515篇
  2016年   487篇
  2015年   305篇
  2014年   398篇
  2013年   1991篇
  2012年   798篇
  2011年   852篇
  2010年   523篇
  2009年   442篇
  2008年   722篇
  2007年   671篇
  2006年   610篇
  2005年   508篇
  2004年   488篇
  2003年   458篇
  2002年   490篇
  2001年   747篇
  2000年   771篇
  1999年   569篇
  1998年   271篇
  1997年   226篇
  1992年   453篇
  1991年   422篇
  1990年   449篇
  1989年   421篇
  1988年   405篇
  1987年   406篇
  1986年   410篇
  1985年   430篇
  1984年   335篇
  1983年   300篇
  1982年   240篇
  1981年   218篇
  1979年   391篇
  1978年   279篇
  1977年   252篇
  1976年   222篇
  1975年   342篇
  1974年   374篇
  1973年   353篇
  1972年   332篇
  1971年   293篇
  1970年   262篇
  1969年   323篇
  1968年   362篇
  1967年   324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.
Philosophia - We can hear silence because silence, an absence of sound, causes our hearing of it. Advocating this position, Roy Sorensen puts to use his own theory of the direct perception of...  相似文献   
4.
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   
5.
6.
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   
7.
8.
9.
10.
Subjects in five experiments read nine-digit memory lists from a cathode ray tube for immediate recall. Reading aloud always produced a localized and reliable advantage for the last item, compared to reading silently. Two experiments on whispered and mouthed lists, with or without simultaneous broadband noise, falsified expectations derived from the theory of precategorical acoustic storage. Three additional experiments showed no enhancement of recency in the silent conditions when the digits were drawn or spelled gradually on the screen, a result that is inconsistent with the changing-state hypothesis. The classic auditory-visual modality effect is large and reliable, but still poorly understood.  相似文献   
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