全文获取类型
收费全文 | 12485篇 |
免费 | 325篇 |
国内免费 | 2篇 |
专业分类
管理学 | 1841篇 |
民族学 | 46篇 |
人口学 | 1167篇 |
丛书文集 | 41篇 |
教育普及 | 1篇 |
理论方法论 | 1148篇 |
综合类 | 149篇 |
社会学 | 6151篇 |
统计学 | 2268篇 |
出版年
2021年 | 70篇 |
2020年 | 172篇 |
2019年 | 229篇 |
2018年 | 259篇 |
2017年 | 355篇 |
2016年 | 285篇 |
2015年 | 185篇 |
2014年 | 279篇 |
2013年 | 2043篇 |
2012年 | 325篇 |
2011年 | 330篇 |
2010年 | 268篇 |
2009年 | 251篇 |
2008年 | 316篇 |
2007年 | 295篇 |
2006年 | 333篇 |
2005年 | 290篇 |
2004年 | 258篇 |
2003年 | 201篇 |
2002年 | 238篇 |
2001年 | 276篇 |
2000年 | 280篇 |
1999年 | 269篇 |
1998年 | 232篇 |
1997年 | 200篇 |
1996年 | 213篇 |
1995年 | 192篇 |
1994年 | 194篇 |
1993年 | 214篇 |
1992年 | 219篇 |
1991年 | 239篇 |
1990年 | 243篇 |
1989年 | 218篇 |
1988年 | 214篇 |
1987年 | 201篇 |
1986年 | 187篇 |
1985年 | 204篇 |
1984年 | 203篇 |
1983年 | 193篇 |
1982年 | 136篇 |
1981年 | 117篇 |
1980年 | 122篇 |
1979年 | 157篇 |
1978年 | 123篇 |
1977年 | 100篇 |
1976年 | 114篇 |
1975年 | 82篇 |
1974年 | 114篇 |
1973年 | 79篇 |
1972年 | 60篇 |
排序方式: 共有10000条查询结果,搜索用时 125 毫秒
1.
Objectives: In the United States, HIV continues to disproportionately affect men who have sex with men. One promising area of research that may inform the development of behavioral interventions among male–male couples is within the realm of sexual agreements. Methods: The purpose of our analysis was to determine whether respondents who report having an open agreement or an agreement breakage also report a higher incidence of recent (within the previous 12 months) intimate-partner violence (IPV) compared to respondents who report having a monogamous agreement or no agreement breakage after controlling for demographic variables. Results: Results showed that men who have an open agreement are less likely to report recent physical IPV. Conclusions: The results highlight the need to develop dyadic behavior interventions that address sexual agreements and stress management. 相似文献
2.
Oliveira Flávio G. Tapisso Joaquim T. von Merten Sophie Rychlik Leszek Fonseca Paulo J. Mathias Maria da Luz 《Urban Ecosystems》2021,24(5):851-862
Urban Ecosystems - The development of urban areas imposes challenges that wildlife must adapt to in order to persist in these new habitats. One of the greatest changes brought by urbanization has... 相似文献
3.
Theory and Society - The massive expansion of US higher education after World War II is a sociological puzzle: a spectacular feat of state capacity-building in a highly federated polity. Prior... 相似文献
4.
de Jong Petra W. Caarls Kim de Valk Helga A. G. 《Population research and policy review》2022,41(2):671-694
Population Research and Policy Review - The welfare state can be perceived as a safety net which helps individuals adjust to situations of risk or transition. Starting from this idea of the welfare... 相似文献
5.
6.
7.
We find “green” labels increase residential property values by an average of 5%. This premium varies by label stringency and across market segments. Builders respond to the stringency of labels by strategically incorporating green features to achieve higher ratings. This strategy seems reasonable as there is no market premium for green features that lead to scores between label rating cutoff values. These results raise important questions as to how green label policies should be designed in order to foster the supply of green features. Gradations of green attributes are influential, particularly for highly rated homes. The most stringent labels have the greatest role at the high price end of the market. (JEL Q20, Q40, R31) 相似文献
8.
9.
From the inception of the proportional representation movement it has been an issue whether larger parties are favored at
the expense of smaller parties in one apportionment of seats as compared to another apportionment. A number of methods have
been proposed and are used in countries with a proportional representation system. These apportionment methods exhibit a regularity
of order, as discussed in the present paper, that captures the preferential treatment of larger versus smaller parties. This
order, namely majorization, permits the comparison of seat allocations in two apportionments. For divisor methods, we show
that one method is majorized by another method if and only if their signpost ratios are increasing. This criterion is satisfied
for the divisor methods with power-mean rounding, and for the divisor methods with stationary rounding. Majorization places
the five traditional apportionment methods in the order as they are known to favor larger parties over smaller parties: Adams,
Dean, Hill, Webster, and Jefferson.
Received: 5 August 2000/Accepted: 24 October 2001 相似文献
10.
Aldaba Fernando T. 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》2002,13(2):179-192
This paper discusses an emerging role for Philippine NGOs—building and maintaining intersectoral cooperation among various sectors of society to tackle key issues like agricultural development, HIV/AIDS, and agrarian reform. The three case studies elaborated in the paper show that Philippine NGOs play important intermediary and bridging functions crucial for the success of multistakeholder partnerships. NGOs are well equipped for this because of their middle-class and professional nature and because of various characteristics like autonomy, flexibility, and the ability to mobilize resources. 相似文献