全文获取类型
收费全文 | 17395篇 |
免费 | 481篇 |
专业分类
管理学 | 2482篇 |
民族学 | 89篇 |
人才学 | 2篇 |
人口学 | 1455篇 |
丛书文集 | 98篇 |
教育普及 | 2篇 |
理论方法论 | 1746篇 |
综合类 | 402篇 |
社会学 | 8791篇 |
统计学 | 2809篇 |
出版年
2023年 | 102篇 |
2021年 | 98篇 |
2020年 | 274篇 |
2019年 | 374篇 |
2018年 | 385篇 |
2017年 | 569篇 |
2016年 | 418篇 |
2015年 | 360篇 |
2014年 | 402篇 |
2013年 | 2815篇 |
2012年 | 585篇 |
2011年 | 548篇 |
2010年 | 373篇 |
2009年 | 370篇 |
2008年 | 406篇 |
2007年 | 456篇 |
2006年 | 378篇 |
2005年 | 500篇 |
2004年 | 456篇 |
2003年 | 375篇 |
2002年 | 407篇 |
2001年 | 430篇 |
2000年 | 389篇 |
1999年 | 394篇 |
1998年 | 269篇 |
1997年 | 270篇 |
1996年 | 267篇 |
1995年 | 235篇 |
1994年 | 245篇 |
1993年 | 236篇 |
1992年 | 289篇 |
1991年 | 277篇 |
1990年 | 256篇 |
1989年 | 266篇 |
1988年 | 239篇 |
1987年 | 223篇 |
1986年 | 230篇 |
1985年 | 202篇 |
1984年 | 252篇 |
1983年 | 233篇 |
1982年 | 204篇 |
1981年 | 172篇 |
1980年 | 173篇 |
1979年 | 194篇 |
1978年 | 159篇 |
1977年 | 136篇 |
1976年 | 120篇 |
1975年 | 119篇 |
1974年 | 108篇 |
1973年 | 102篇 |
排序方式: 共有10000条查询结果,搜索用时 125 毫秒
971.
Michael S. Rendall 《Demography》1999,36(3):369-376
I analyze the prevalence of single motherhood among black and non-Hispanic white women in terms of differences in entry and exit. Higher initial entry rates among black women, especially through unpartnered childbearing, account for slightly more than half the difference between blacks and whites in the prevalence of single motherhood. The remainder of the difference is due to black single mothers' much lower rates of exit through union formation and to their very high rates of reentry through dissolution of these later unions. Entry and exit rates through the 1990s imply a widening racial gap. 相似文献
972.
Popular or media portrayals have suggested that many suburban housewives are dissatisfied with a number of aspects of their lives. This claim was investigated by surveying two groups of Brisbane women. Data obtained firstly from a sample at a shopping town and secondly from the members of a women's social club suggests that the dissatisfaction with the role of housewife expressed in the media may be overstated. Women find a lack of social contacts with others to be acute but report satisfaction with other aspects of their lives. Tentative solutions to facilitate social contacts between women are suggested. 相似文献
973.
Rehousing of elderly people in Australia has generally not been preceded by research into the kind of assistance that is necessary. An example is given of how an attempt was made to discover the needs of the elderly disabled in a small country community. Assessment by observation of people at home revealed the need for assistance for them to stay where they were. Home Care organized from the district hospital is often a more appropriate answer to this problem than the building of expensive and unnecessary institutions. 相似文献
974.
This paper reviews earlier research and presents new analytical findings regarding the outcomes of social movements. Using the resource mobilization/management approach, empirical propositions that seek to explain protest group success or failure are tested. Based upon data gathered from a sample of 53 US protest groups, the causal models explained the majority of the variance in degree of success between these groups. Our findings indicate that protest groups which threaten to replace or destroy established groups are usually unsuccessful, and those having many strong alliances tend to be more successful than groups fighting alone. The use of violence does not greatly aid the prediction of group outcome because of the unpredictable, ambivalent reaction to violence by established groups. 相似文献
975.
976.
977.
Summary Theoretical approaches to grief and mourning have emphasizedthe instinctual and biological elements of a person's responseto bereavement. The behaviour of bereaved individuals has thereforebeen interpreted on the basis of these theoretical models. Thispaper argues that an appreciation of the social context in whichbereavement occurs leads to a fuller understanding of observedresponses in such a situation. It thus emphasizes the socialnature of individuals rather than their biological make-up andprovides a theoretical frame of reference in terms of whichthis may be understood. Such an analysis also has implicationsfor the kind of help which is seen to be appropriate to theneeds of bereaved people. It is suggested that social workersshould develop a greater understanding of this approach andthat, on the basis of this, they would then have a particularrole to play in relation to this area of need 相似文献
978.
In their professional capacities doctors are often confronted with clients who present with psycho-sexual problems. At the present time Australian medical students are provided with very little instruction in the areas of human sexual behaviour. This paper examines the attitudes and amount of information possessed by a cohort of second year medical students compared with groups of first and fifth year students; these attitudes and levels of information are then related to students' sex, religious affiliation, strength of religious conviction, where this is seen to be relevant. It is shown that some areas of ignorance exist. The paper concludes by outlining some aspects relevant to courses in human sexual behaviour. 相似文献
979.
Diversification gains in mean-variance efficiency derived from including real estate in financial asset portfolios are examined. Optimal financial and mixed-asset portfolios were generated by selecting from an investment universe including several distinct financial and real estate media. Deficiencies of previous studies were overcome by employing data with improved representativeness and comparability. The efficient mixed-asset portfolios dominated the efficient financial asset portfolios implying that purely financial asset diversification is inefficient. The optimal mixed-asset portfolio prescribed that approximately two-thirds of the investment wealth be allocated to real estate and one-third to the financial media. 相似文献
980.
To provide effective managerial support for decisions related to production planning and scheduling processes, it is useful to partition the set of decisions into a hierarchical framework. In the resulting system, higher level decisions impose constraints on lower level actions, and lower level decisions provide the necessary feed-back to reevaluate higher level actions. The purpose of this paper is to suggest optimum procedures to deal with the resulting subproblems and to analyze the interaction mechanisms among the different hierarchical levels. Computational results are given. 相似文献