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   52874篇
  免费   1380篇
  国内免费   8篇
  2020年   317篇
  2019年   451篇
  2018年   3918篇
  2017年   3271篇
  2016年   2769篇
  2015年   624篇
  2014年   620篇
  2013年   2491篇
  2012年   1535篇
  2011年   3370篇
  2010年   3057篇
  2009年   2060篇
  2008年   2601篇
  2007年   3005篇
  2006年   899篇
  2005年   988篇
  2004年   911篇
  2003年   777篇
  2002年   767篇
  2001年   1050篇
  2000年   983篇
  1999年   723篇
  1998年   403篇
  1997年   328篇
  1996年   316篇
  1992年   550篇
  1991年   545篇
  1990年   536篇
  1989年   538篇
  1988年   533篇
  1987年   496篇
  1986年   522篇
  1985年   571篇
  1984年   452篇
  1983年   431篇
  1982年   354篇
  1981年   338篇
  1979年   523篇
  1978年   378篇
  1976年   360篇
  1975年   434篇
  1974年   487篇
  1973年   508篇
  1972年   407篇
  1971年   381篇
  1970年   378篇
  1969年   409篇
  1968年   489篇
  1967年   421篇
  1966年   422篇
排序方式: 共有10000条查询结果,搜索用时 93 毫秒
51.
52.
A growing literature has observed a significant reduction in pain sensitivity among hypertensive animals and humans. It is uncertain whether a reduced sensitivity to pain can be observed in nonnotensive individuals who go on to develop high blood pressure. Blood pressure (BP) was reassessed in one hundred fifteen 19-year-old boys initially tested at age 14, when they were also presented with a pain stimulus (mechanical finger pressure). Hierarchical regression analyses indicated that information regarding pain tolerance improved prediction of changes in systolic and diastolic blood pressure beyond that afforded by differences in BP at age 14, parental history of hypertension, and body mass index. These analyses suggest that pain sensitivity may be associated with physiological processes involved in the development of sustained high blood pressure.  相似文献   
53.
54.
55.
Suicides among older adults in the United States and Canada in the last decade have accounted for an increasing share of all suicides. In both countries the use of firearms among older adults has steadily increased. Despite these trends, little is known about the extent to which crisis centers are prepared to prevent elder suicide. A survey of AAS-listed crisis prevention centers examined the training, knowledge, and current practices relevant to elder suicide among personnel in 321 crisis prevention centers in both countries. Results revealed insufficient training, a lack of familiarity with recent suicide trends, and limited outreach to older adults.  相似文献   
56.
The country‐of‐origin effect is a topic central to the field of international marketing. Country of origin has been found to exert a particularly potent effect on consumer evaluation in situations where there is a strong link between a country and a particular product category. The present study provides further insight into how this particular effect can be understood. Drawing on a novel conceptualization of how country image and product categories interact, this study tested the relative evaluative relevance of product category with respect to estimates of brand equity across a variety of product categories. The findings suggest that facets of a country's image that are more closely related to the evaluation situation exert a greater influence on the evaluation of brands. This result encourages scholars as well as practitioners to re‐evaluate which situations might cause the country of origin effect to hold managerial relevance and paves the way for new paths toward a more comprehensive understanding of the effect. Copyright © 2015 John Wiley & Sons, Ltd.  相似文献   
57.
58.
59.
60.
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