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   109285篇
  免费   3578篇
  国内免费   165篇
管理学   13497篇
劳动科学   60篇
民族学   1113篇
人才学   40篇
人口学   7543篇
丛书文集   5749篇
教育普及   2篇
理论方法论   10392篇
现状及发展   1篇
综合类   10041篇
社会学   44328篇
统计学   20262篇
  2023年   584篇
  2022年   558篇
  2021年   785篇
  2020年   1724篇
  2019年   2369篇
  2018年   2343篇
  2017年   3558篇
  2016年   2668篇
  2015年   2598篇
  2014年   3290篇
  2013年   19757篇
  2012年   3330篇
  2011年   3555篇
  2010年   3336篇
  2009年   3614篇
  2008年   3283篇
  2007年   3368篇
  2006年   3637篇
  2005年   3506篇
  2004年   2810篇
  2003年   2408篇
  2002年   2555篇
  2001年   2552篇
  2000年   2207篇
  1999年   2027篇
  1998年   1677篇
  1997年   1561篇
  1996年   1521篇
  1995年   1484篇
  1994年   1435篇
  1993年   1412篇
  1992年   1414篇
  1991年   1321篇
  1990年   1273篇
  1989年   1121篇
  1988年   1216篇
  1987年   1061篇
  1986年   958篇
  1985年   1123篇
  1984年   1185篇
  1983年   1064篇
  1982年   978篇
  1981年   880篇
  1980年   830篇
  1979年   906篇
  1978年   793篇
  1977年   713篇
  1976年   664篇
  1975年   646篇
  1974年   536篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
981.
This paper presents an argument for further engagement between educational scholars and school-based social justice activists. An analysis of one segment of the broad field of social justice education focuses on multicultural and antiracist education, particularly as they are understood in the Canadian socio-political context. A brief overview of the literature from UK and US sources highlights their complex and often overlapping concerns, and the need for more dialogue across national boundaries toward progressive social change. Excerpts from in-depth interviews with four Canadian teacher-activists reveal the potential for educators to take up various debates and findings from the academic literature in their daily struggles to work for social justice.  相似文献   
982.
本文概叙了入世后中国农业面临的农产品品质 安全性及价格的三重冲击和应采取的应对措施 着重分析了农产品安全问题和食品安全保障体系的构建 论述了分析测试技术和科学仪器的七项重任  相似文献   
983.
Summary. Possible health hazards from mobile phones arise from the use of the phones themselves and via the base stations that relay signals. Except for an increase in traffic accidents induced by the use of mobile phones in cars the evidence for a health hazard is at most indirect, but it cannot be entirely dismissed; the phones have not been widely used for sufficiently long for direct epidemiological studies to have high sensitivity for detecting any induced incidence of cancer, for example. The background and evidence are briefly reviewed and the steps taken in the UK to make information widely available described.  相似文献   
984.
Julia R. Irwin 《Infancy》2003,4(4):503-516
This study examined whether perceivers can detect infant distress in the visual and acoustic signals within the cry. Parent and nonparent perceivers rated distress in 3‐, 6‐, 8‐, and 12‐month‐old infants' cries that were manipulated to separate facial, vocal, and bodily action. Mean perceiver ratings differed for high‐ and low‐distress cries at each infant age on the basis of facial and vocal action, but not bodily movement. Perceivers rated the cry sound as more distressed and the cry face as less distressed with increasing infant age. Parents rated the cries as less distressed overall than did nonparents. The results suggest that information about distress is available for perceivers in the crying infant's face and voice.  相似文献   
985.
The Alchian and Allen theorem predicts that it will be harder to find "good" apples in the State of Washington, a prime apple-growing region, than in, say, New York City, where the addition of shipping charges makes "bad" apples comparatively more expensive. We recast the theorem as a testable proposition by explicitly taking the supply side into account and identifying plausible scenarios in which a fixed cost either has no effect on the relative prices of high and low quality grades of the same good in distant markets or, indeed, causes more of the bad apples to be shipped out.  相似文献   
986.
随着市场经济的发展 ,格式合同应用越来越普遍 ,随之带来的是法律对其规定的日益完善。文章通过对格式合同历史发展过程的简要分析 ,阐述了对格式合同的解释存在歧义时 ,应作不利于提供格式合同一方的解释 ,格式合同的条款无效的效力也限于提供合同的一方 ,另一方不承担相应的无效责任  相似文献   
987.
农业是美国所有产业中竞争最激烈的产业之一 ,农业的激烈竞争主要是由进入“门槛”低所致。在 1981到 1990年期间 ,美国联邦政府花在农业上的补贴超过 2 50 0亿美元。价格补贴是美国农业保护政策的基础 ,成本补贴又使因价格补贴导致的市场过剩更加严重。对农民采取直接收入补贴政策的好处在于 :该政策能在不引起市场价格和农业产出扭曲的情况下 ,保证农民收入能达到一定水平  相似文献   
988.
This study examined the processes that underlie the association between trait expressiveness and marital satisfaction. A total of 168 newlywed couples participated in a four‐wave, 13‐year longitudinal study of marriage. Cross‐sectional and longitudinal path analyses suggested that expressiveness promotes satisfaction by leading spouses to engage in affectionate behavior and by leading them to idealize their partner. Expressive people formed idealized images of their partner because they brought out the best in their partner's behavior and because they interpreted their partner's behavior in a favorable light. The study extends previous research by showing that the benefits of trait expressiveness extend into the second decade of marriage and by providing a plausible explanation of the connections between trait expressiveness and marital satisfaction.  相似文献   
989.
The authors explored predictions of general job satisfaction at early and middle adulthood and uncovered several findings about developmental processes associated with job satisfaction. Tests of life‐span career theory propositions revealed that neither choice‐job congruence nor gender added significantly to predictions of job satisfaction at 2 career stages. Earlier occupational choice and current job added to predictions of midcareer (modal age 43 years) job satisfaction, especially for men. The predictability of job satisfaction is apparently influenced by the career stage when satisfaction is appraised.  相似文献   
990.
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