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   11417篇
  免费   130篇
管理学   1498篇
民族学   56篇
人才学   1篇
人口学   927篇
丛书文集   60篇
教育普及   3篇
理论方法论   961篇
综合类   118篇
社会学   6033篇
统计学   1890篇
  2023年   63篇
  2021年   63篇
  2020年   144篇
  2019年   207篇
  2018年   217篇
  2017年   340篇
  2016年   243篇
  2015年   164篇
  2014年   242篇
  2013年   2282篇
  2012年   295篇
  2011年   328篇
  2010年   228篇
  2009年   217篇
  2008年   234篇
  2007年   251篇
  2006年   239篇
  2005年   235篇
  2004年   198篇
  2003年   189篇
  2002年   205篇
  2001年   243篇
  2000年   244篇
  1999年   245篇
  1998年   178篇
  1997年   161篇
  1996年   206篇
  1995年   197篇
  1994年   210篇
  1993年   219篇
  1992年   208篇
  1991年   199篇
  1990年   212篇
  1989年   189篇
  1988年   186篇
  1987年   163篇
  1986年   156篇
  1985年   165篇
  1984年   159篇
  1983年   130篇
  1982年   119篇
  1981年   104篇
  1980年   117篇
  1979年   108篇
  1978年   107篇
  1977年   84篇
  1976年   86篇
  1975年   87篇
  1974年   58篇
  1971年   51篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
992.
This article stresses the importance of immunization in child care for prevention of many diseases. It discusses the reasons for the failure within the United States to eradicate many infectious diseases in children despite the availability of technology. Suggestions for action to improve this situation are made.  相似文献   
993.
The extent of carcinogen regulation under existing U.S. environmental statutes is assessed by developing measures of the scope and stringency of regulation. While concern about cancer risk has played an important political role in obtaining support for pollution control programs, it has not provided the predominant rationale for most regulatory actions taken to date. Less than 20% of all standards established to limit concentrations of chemicals in various media address carcinogens. Restrictions on chemical use are more frequently based on concerns about noncancer human health or ecological effects. Of the chemicals in commercial use which have been identified as potential human carcinogens on the basis of rodent bioassays, only a small proportion are regulated. There is an inverse relationship between the scope of regulatory coverage and the stringency of regulatory requirements: the largest percentages of identified carcinogens are affected by the least stringent requirements, such as information disclosure. Standards based on de minimis cancer risk levels have been established for only 10% of identified carcinogens and are restricted to one medium: water. Complete bans on use have affected very few chemicals. The general role that carcinogenicity now plays in the regulatory process is not dramatically different from that of other adverse human health effects: if a substance is identified as a hazard, it may eventually be subject to economically achievable and technically feasible restrictions.  相似文献   
994.
This study investigated the relationship between the level of arousal (Heart Rate) and the number of erroneous perceptions among video poker players. Twelve regular and twelve occasional gamblers participated in a gambling session conducted in a natural environment. It was hypothesised that 1) a significant positive correlation would be observed between arousal and the number of erroneous verbalizations, 2) regular players would show a higher level of arousal than occasional players, and 3) they would emit more erroneous verbalizations. Results showed that hypotheses one and three were confirmed. Theoretical and practical implications of these results for the psychology of gambling are discussed.This study was supported by a grant from Loto-Québec.  相似文献   
995.
996.
From 1980 to mid-1990 fifty-one gamblers were evaluated and treated at the psychiatric university hospital of Homburg/Saar in Germany. All were men with a mean age of 33.7 years. Gambling had lasted 5.2 years on average. Most patients were motivated to undergo therapy by members of their family. The majority of them had been in psychotherapeutic treatment before. Thirty-six of the 51 patients had committed punishable acts including fraud and embezzlement and, in 7 cases, robbery. The sample could be divided into three clinical subgroups. The first group consisted of patients with severe psychiatric diseases such as schizophrenia, manic-depressive illness or organic brain disorder. Patients of the second group suffered from serious personality disorders. Those of the third group showed deep-rooted problems in their current relationships.This article is an extension of the special issue on Gambling in Europe edited by Iver Hand, M.D.  相似文献   
997.
998.
Child welfare workers and agencies are vulnerable to lawsuits. Recent court rulings have more clearly defined the liability of workers. The distinguishing variable is custody. Children injured while in the custody of the state are entitled to sue for damages. Children injured by their parent, even if under the supervision of a child welfare agency, are not entitled to claim a violation of their 14th Amendment rights. These cases are reviewed and strategies designed to minimize vulnerability are offered.  相似文献   
999.
This paper explores an unusual and innovative application of psychodynamically oriented clinical social work method to the sports area. The coach of a national Olympics team requested a clinical consultation because he suspected that there might be psychosocial reasons why a certain number of world class atheletes he was coaching were not performing up to their full potential.  相似文献   
1000.
A life satisfaction measure is developed in this paper drawn from a judgment-type theory. This measure is based on the theoretical notion of life satisfaction being a function of a comparison between perceived life accomplishments and a set of evoked standards. These standards are classified as to their derivative sources (e.g., the life accomplishments of relatives, friends, associates, past experience, self-concept of strengths and weaknesses, and average person in a similar position) and different forms (e.g., standards based on ideal, expected, deserved, minimum tolerable, and predicted outcomes). Two studies were conducted on the elderly to ascertain the internally consistent and possessing construct validity correlations through high and internally consistent and possessing construct validity correlations through high and positive correlations with the Delighted-Terrible Life Satisfaction Scale; through significant and positive correlations with cognitive age, income, employment, education, marital status, social contact, activity, religiosity, morale, television viewership, and selfrated health; and through nonsignificant correlations with chronological age, gender, and parenthood.  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