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   14209篇
  免费   396篇
管理学   1911篇
民族学   72篇
人才学   4篇
人口学   1122篇
丛书文集   78篇
教育普及   3篇
理论方法论   1326篇
综合类   136篇
社会学   7524篇
统计学   2429篇
  2023年   76篇
  2021年   74篇
  2020年   193篇
  2019年   294篇
  2018年   306篇
  2017年   434篇
  2016年   327篇
  2015年   255篇
  2014年   328篇
  2013年   2774篇
  2012年   404篇
  2011年   385篇
  2010年   308篇
  2009年   289篇
  2008年   327篇
  2007年   303篇
  2006年   342篇
  2005年   341篇
  2004年   266篇
  2003年   250篇
  2002年   270篇
  2001年   339篇
  2000年   302篇
  1999年   327篇
  1998年   217篇
  1997年   185篇
  1996年   242篇
  1995年   233篇
  1994年   258篇
  1993年   261篇
  1992年   266篇
  1991年   257篇
  1990年   272篇
  1989年   238篇
  1988年   229篇
  1987年   206篇
  1986年   186篇
  1985年   207篇
  1984年   211篇
  1983年   148篇
  1982年   152篇
  1981年   120篇
  1980年   129篇
  1979年   125篇
  1978年   111篇
  1977年   98篇
  1976年   97篇
  1975年   97篇
  1974年   72篇
  1973年   64篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
251.
Wrestling with ghosts and staging fatal accidents with Matchbox cars allow a critically ill six-year-old to come to terms with the fears prompted by his illness.  相似文献   
252.
Reform of the U.S. health care system along the lines to be proposed by the Clinton Administration will not be an easy task, and it will not be accomplished quickly. A fundamental objective of the changes should be a health system whose purpose is improvement in the health of U.S. citizens, and not just the provision of services to all. This column is jointly edited by Kevin M. Fickenscher, MD, and David A. Kindig, MD, PhD, chair and member, respectively, of the College's Forum on National Health Policy. Dr. Fickenscher is participating in various advisory capacities on health care in the Clinton Administration, and Dr. Kindig is Senior Advisor to HHS Secretary Donna Shalala.  相似文献   
253.
254.
5he purpose of this study was to determine whether or not suspected variables affected a surgery clerk's chances of being awarded an honor rating. Findings indicated a significant relationship between a student receiving an honor rating and his or her preceptor's predetermined level of student advocacy, the number of completed patient interview and physical examination write-ups, and final examination scores. There was no significant relationship found between honor ratings and the preceptor's status, the sequence in which the student was discussed or the length of time spent discussing the student at the final evaluation meeting, or the number of clinical faculty present at the meeting. These results lend support to the faculty forum evaluation approach, but suggest a need for further scrutiny of some influencing variables to ensure all students are fairly considered and honor ratings judiciously awarded.  相似文献   
255.
This article reviews the background of the proposed Immigration and Reform Act (also known as the Simpson-Mazzoli bill), which seeks to overhaul US immigration law for the first time since 1952. This bill is consistent with President Reagan's hard line on border enforcement and mandates stiff penalties for those who transport illegal aliens for commercial advantage or private profit. It further offers Mexico preferential treatment in immigration (40,000 additional visas/year). It includes an amnesty program to offer legal status to qualified illegal residents. The bill directs the President to develop a secure national worker identification system and would create a large-scale temporary foreign agricultural program for perishable commodities. Agricultural workers' families would not be eligible to accompany them unless they also obtain temporary visas. Foreign temporary workers, employable only in cases where local domestic workers are not available, must be provided with wages and working conditions equal to those prevailing among domestic workers. Stiff penalties are stipulated for employers who fail to abide with the terms of the program. In the author's opinion, this bill fails to appreciate the global character of international migration and its complexity. It relects a fundamental ambivalence about a strictly controlled main gate versus a back door approach to immigration as well as the conflicting images of the US as a nation of immigrants versus the historical reality of American nativism and xenophobia. Needed are comprehensive initiatives whose mutually reinforcing components can address the multiple dimensions of the immigration problem within a framework that does not ignore workers who have contributed to the economic well-being of the US, regardless of their legal status.  相似文献   
256.
Kelly and Cutright (1983), using regression techniques, conclude that birth control is among the more important determinants of Swedish illegitimacy. To derive this conclusion, they use changes in the marital fertility of wives aged 35-39 as a proxy for birth control. They maintain that annual change in the marital fertility rate of wives aged 35-39 is not likely to be greatly influenced by annual change in factors other than birth control. The "argument" appears to derive from the "desired family size" model of childbearing--a basic assumption of social demography. In it simplest form it states that most couples do not practice birth control until they reach a preconceived goal, or desired family size. It thus implies that a change in family size preferences will most affect the birth control practices of the oldest reproductive age groups. The simple form of the model has been questioned by the failure of Western couples to reproductively compensate for a major proportion of their child deaths, by the proportions of Western couples who say they would have preferred larger families than they actually had, by the predictive inadequacy of family size preferences, and by suggestions that age may be the more important determinant of reproduction. As a result some demographers now concede its inadequacy. Others are trying to relax its assumptions, with as yet problematic success. Essentially every Western fertility decline to date has been characterized by an increasing concentration of childbearing in the youngest age groups. In discussing this pattern social demographers have maintained that it could only have come about by a decline in family size preferences. This then is the standard argument supporting Kelly and Cutright's proxy for birth control. The authorities who offer it generally ignore the difficulties with the desired family size model and simply assert without justification that couples do in fact conform to it. Data on the age patterns of chronic disease and on the reproductive effects of environmental stressors suggest that the modern age pattern of fertility could also be produced by a deteriorating environment. Kelly and Cutright are incorrect in asserting that factors other than voluntary birth control could not be responsible for changes in fertility at ages 35-39. At best they may argue that their proxy is uniquely definitive provided that the desired family size model can be saved and provided the health of Western populations has not been compromised by technological change. At issue is a debate between what Dunlap calls the human exemptionalist and the ecological world views.  相似文献   
257.
From time to time during social encounters, people look at one another in the region of the eyes, and sometimes their eyes meet to make eye-contact. According to Argyle and Dean (1965), eye-contact in dyadic encounters signals the intimacy of the interaction and is controlled largely by the competing approach and avoidance forces that motivate the pair. In the present paper, new analyses are reported of three published experiments that were designed originally to test aspects of the intimacy model and it is shown that the duration of eye-contact is no more than a chance product of how long the two subjects look individually. Looking and not eye-contact, it is argued, should be the basis for models of visual interaction, and the intimacy model is ill-founded conceptually; the role of emotion in gaze has been overstressed at the expense of the concept of information; and the most important aspect of vision is in any case not looking and eye-contact but visual access to the whole person. The more cueless the encounter—that is, the fewer the social cues from vision and all the other senses combined—the greater the psychological distance; and the greater the psychological distance, the more task-oriented and depersonalized the content of what people say and, in turn, the less spontaneous their style of speech and the less likely a debate to end in compromise.Research for this article was sponsored by the Social Science Research Council of Great Britain.  相似文献   
258.
Lorenzo MK  Adler DA 《Social casework》1984,65(10):600-614
Serious mental health problems exist within the Chinese population of the United States. This article describes one center's attempt to meet the psychiatric needs of both nonpsychotic and psychotic Chinese patients through bilingual, culturally relevant treatments.  相似文献   
259.
260.
The influence of child spacing on child survival   总被引:1,自引:0,他引:1  
Summary This study evaluates the strength of the influence of spacing on child survival. Data related to a traditional culture (Punjab) in which almost all children are breast-fed up to the age of 17 months. An initial pregnancy history survey, subsequent four years updating through continuous monitoring of vital events and a second cross-sectional pregnancy history survey at the mid-point provided a file containing information on pregnancies and survival of children of 5,018 women. The analysis first looks at the correlation between the lengths of the preceding and subsequent intervals of index children, then examines whether this correlation was related to the repeated pattern of child death or survival. Next, the influence of the duration of the preceding interval on the survival of the index child in general and after accounting for the fate of the preceding child were considered. Then the influence of the length of the subsequent interval on the survival of the index child after conception and after the birth of the next child were studied. Lastly, regression analyses with preceding and subsequent intervals as independent variables and age-specific survival or death as the dependent variable were performed.  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