全文获取类型
收费全文 | 22305篇 |
免费 | 470篇 |
国内免费 | 16篇 |
专业分类
管理学 | 2734篇 |
民族学 | 146篇 |
人才学 | 1篇 |
人口学 | 2133篇 |
丛书文集 | 171篇 |
理论方法论 | 2021篇 |
综合类 | 810篇 |
社会学 | 11270篇 |
统计学 | 3505篇 |
出版年
2023年 | 143篇 |
2022年 | 111篇 |
2021年 | 185篇 |
2020年 | 400篇 |
2019年 | 515篇 |
2018年 | 700篇 |
2017年 | 918篇 |
2016年 | 677篇 |
2015年 | 476篇 |
2014年 | 604篇 |
2013年 | 3700篇 |
2012年 | 847篇 |
2011年 | 731篇 |
2010年 | 595篇 |
2009年 | 506篇 |
2008年 | 598篇 |
2007年 | 584篇 |
2006年 | 599篇 |
2005年 | 526篇 |
2004年 | 459篇 |
2003年 | 401篇 |
2002年 | 426篇 |
2001年 | 500篇 |
2000年 | 439篇 |
1999年 | 441篇 |
1998年 | 336篇 |
1997年 | 302篇 |
1996年 | 280篇 |
1995年 | 286篇 |
1994年 | 250篇 |
1993年 | 263篇 |
1992年 | 298篇 |
1991年 | 310篇 |
1990年 | 300篇 |
1989年 | 293篇 |
1988年 | 244篇 |
1987年 | 290篇 |
1986年 | 232篇 |
1985年 | 270篇 |
1984年 | 269篇 |
1983年 | 247篇 |
1982年 | 224篇 |
1981年 | 198篇 |
1980年 | 180篇 |
1979年 | 194篇 |
1978年 | 170篇 |
1977年 | 136篇 |
1976年 | 155篇 |
1975年 | 168篇 |
1974年 | 135篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
Changing Frameworks in Attitudes Toward Abortion 总被引:1,自引:0,他引:1
For more than two decades, legal abortion has been the subject of heated political debate and adversarial social movement activity; however, national polls have shown little change in aggregate levels of support for abortion. This analysis examines how the determinants of abortion attitudes have changed between 1977 and 1996, using data from the General Social Surveys. While in early time periods, whites were more approving of abortion than blacks, that pattern had reversed by the late 1980s. After controlling for other factors, older people are more accepting of abortion throughout the two decades, while gender is generally unrelated to abortion views. Catholic religion weakens slightly as a predictor of abortion attitudes, while religious fundamentalism and political liberalism increase in explanatory power. The associations between attitudinal correlates and abortion approval also change over this time period. Religiosity becomes a less powerful predictor of abortion attitudes, while respondents' attitude toward sexual freedom and belief in the sanctity of human life increase in their predictive power. Support for gender inequality remains a weak but stable predictor of abortion attitudes. This pattern of results suggests that the public is influenced more by the pro-life framework of viewing abortion than by the pro-choice perspective. 相似文献
3.
Existence and Nash implementation of efficient sharing rules for a commonly owned technology 总被引:2,自引:0,他引:2
Suppose that a group of individuals owns collectively a technology which produces a consumption good by means of a (possibly
heterogeneous) input. A sharing rule associates input contributions with a vector of consumptions that are technologically
feasible. We show that the set of allocations obtained by any continuous sharing rule contains Pareto efficient allocations.
We also present a mechanism that implements in Nash equilibrium the Pareto efficient allocations contained in an arbitrary
sharing rule.
Received: 29 June 1998/Accepted: 15 November 2000 相似文献
4.
Frontier spaces of vulnerability: Regional change,urbanization, drought and fire hazard in Santarém,Pará, Brazil 总被引:1,自引:1,他引:0
Fire hazard is a mounting concern in tropical rainforests of the Brazilian Amazon and has raised awareness within the science community of the links between agricultural fire use, drought and accidental fire. As a result, fire is being addressed as a crisis event with mitigation focused on those who light fires, particularly smallholder agriculturalists. Little attention is paid to the historical and ongoing ways in which Amazon landscapes and peoples have been made more susceptible to fire. Frontier regions of the Brazilian Amazon serve a variety of functions within the larger Brazilian society, including as extractive reserves for economic development, as social safety valves to reduce population pressures, and as areas to support urban regional integration. Each of these functions has impacted frontier environments in ways that create more flammable landscapes and/or shape the vulnerability of people to fire hazard. This paper uses a case study inthe Brazilian Lower Amazon to understand how vulnerability to fire hazard develops. It argues that if fire mitigation remains centered on fire as a crisis event, an understanding of what constitutes frontier spaces of vulnerability, both in landscape and in populations, will be limited. 相似文献
5.
Susan D. Calkins Susan E. Dedmon Kathryn L. Gill Laura E. Lomax Laura M. Johnson 《Infancy》2002,3(2):175-197
A study sample of 162 six‐month‐old children was selected from a larger sample of 346 infants on the basis of parents' report of their infants' temperament and a laboratory assessment of temperament. Infants were classified as easily frustrated and less easily frustrated and compared on a number of emotion regulation, physiology, and temperament measures. Results indicated that male and female infants were equally likely to be classified as frustrated and less easily frustrated; however, male infants were less able to regulate physiologically. Easily frustrated infants used different emotion regulation strategies and were observed to be less attentive and more active than less easily frustrated infants when observed in the laboratory. These infants were also characterized by their parents as more active, less attentive, and more distressed to novelty. Infants classified as easily frustrated were more reactive physiologically and less able to regulate physiological reactivity than their less easily frustrated counterparts. It is hypothesized that this cluster of characteristics may constitute a unique temperamental type that may have implications for other types of behavioral functioning. Limitations of the study are that observations are based on a single brief assessment of the infant, modest effect sizes were found, and the study is cross‐sectional. 相似文献
6.
7.
8.
9.
10.