全文获取类型
收费全文 | 2637篇 |
免费 | 527篇 |
专业分类
各国政治 | 454篇 |
工人农民 | 103篇 |
世界政治 | 310篇 |
外交国际关系 | 126篇 |
法律 | 1068篇 |
中国政治 | 44篇 |
政治理论 | 994篇 |
综合类 | 65篇 |
出版年
2021年 | 34篇 |
2020年 | 47篇 |
2019年 | 172篇 |
2018年 | 110篇 |
2017年 | 163篇 |
2016年 | 171篇 |
2015年 | 154篇 |
2014年 | 137篇 |
2013年 | 681篇 |
2012年 | 106篇 |
2011年 | 109篇 |
2010年 | 131篇 |
2009年 | 64篇 |
2008年 | 97篇 |
2007年 | 60篇 |
2006年 | 56篇 |
2005年 | 52篇 |
2004年 | 50篇 |
2003年 | 38篇 |
2002年 | 49篇 |
2001年 | 36篇 |
2000年 | 33篇 |
1999年 | 44篇 |
1998年 | 34篇 |
1997年 | 39篇 |
1996年 | 29篇 |
1995年 | 31篇 |
1994年 | 28篇 |
1993年 | 32篇 |
1992年 | 21篇 |
1991年 | 21篇 |
1990年 | 18篇 |
1989年 | 21篇 |
1988年 | 23篇 |
1987年 | 17篇 |
1986年 | 24篇 |
1985年 | 15篇 |
1984年 | 25篇 |
1983年 | 19篇 |
1982年 | 12篇 |
1981年 | 13篇 |
1980年 | 16篇 |
1979年 | 13篇 |
1978年 | 12篇 |
1977年 | 10篇 |
1976年 | 9篇 |
1974年 | 11篇 |
1973年 | 9篇 |
1971年 | 9篇 |
1967年 | 9篇 |
排序方式: 共有3164条查询结果,搜索用时 31 毫秒
1.
Wu‐ting Tsai Ph.D. Chia‐Yun Chang B.S. Chia‐I Hu M.S. 《Journal of forensic sciences》2019,64(4):1230-1233
Fatal fall from a height initiated with a swinging motion on the sagittal plane of the victim's body is examined. Method of analytical mechanics is adopted to establish the functional relations between the swinging angle of the body and the force needed to sustain the body until release, and the amount of the horizontal displacement that would occur after release. The analysis is applied to support an expert opinion presented in a criminal court in which two accused were convicted of murder for dropping a female victim from a bridge. The results indicate that it is unlikely for the body to locate as recorded by the police investigation report in the case. This study demonstrates that a straightforward mechanical analysis can be utilized to examine uncommon falling scenarios. 相似文献
2.
3.
RONALD L. SIMONS LESLIE GORDON SIMONS YI‐FU CHEN GENE H. BRODY KUEI‐HSIU LIN 《犯罪学》2007,45(3):481-517
Past research has largely ignored the developmental changes within the child that account for the association between parenting and risk for delinquency. We used structural equation modeling and data from a longitudinal study of several hundred African‐American families to test the contentions of various theories regarding the sociocognitive and emotional factors that mediate the impact of parental behavior on a youth's risk for delinquency. Our findings largely supported the theories. The impact of monitoring/discipline was indirect through low self‐control and acceptance of deviant norms, whereas the effect of hostility/ rejection was indirect through low self‐control, hostile view of relationships, and acceptance of deviant norms. These two dimensions of parenting were no longer related either to affiliation with deviant peers or to conduct problems once the effects of these psychological characteristics were taken into account; the impact of these parenting practices was completely mediated by these four cognitive/affective variables. Contrary to expectation, however, these psychological factors did not mediate any of the relationship between caretaker involvement in antisocial behavior and child conduct problems. 相似文献
4.
Jean -Pierre Courbois 《Public Choice》1991,70(3):251-265
The existence of predatory behavior, when measured by the number of lawyers per capita and the crime rate, seems to have an impact on saving and investment behavior in U.S. households. Where the risk of redistribution are lowest, the incentives to save are higher and, a fortiriori, the willingness to invest in highly vulnerable financial instruments is enhanced. Either because of low saving rates or because of disintermediation, households in states where the risks of redistribution are greater avoid accumulating financial assets.Recent years have seen a considerable decline in the U.S. saving rate. There is also evidence of large differences in saving rates from one country to another, with U.S. households among the lowest savers. Yet not all of these variations have been explained satisfactorily in empirical studies based on conventional theory. Perhaps one explanation which has been inadequately studied is the reduced expected retirement time horizon whether it be due to objective conditions such as retirement age and life expectancy or to uncertainty. Some reasons for myopic planning horizons are macroeconomic instability (McCauley and Zimer, 1989), the possibility of nuclear war (Slemrod, 1982, 1986 and 1989); Henderschott and Peek, 1985 and 1987); and the fear of socio-political conflict (Stewart and Venieris, 1985). I have suggested and tested here yet another factor: the fear of future redistribution. Using differences in interest income across U.S. states, this paper shows that fear of redistribution does seem to have a large influence on saving behavior. 相似文献
5.
6.
7.
The partnership principle in EU cohesion policy was introduced in order to involve subnational authorities and interest organizations in policy formulation and implementation. In this article we examine how the member states have reacted to this call for a new way of making public policy. We argue that the multi‐level governance literature and the critics of the multi‐level governance framework have not examined implementation structures properly, but have focused on regional influence. We conduct a comparative analysis of the Dutch and Danish implementations of the European Social Fund and the European Regional Development Fund. Our findings show that when examining implementation structures it becomes clear that member states are in full control of the re‐allocation of EU funds. They show that Denmark and The Netherlands have been able to absorb EU cohesion policy within already existing national implementation structures of labour market policies and regional development. One central theoretical implication of our study is that the focus of studies of any fundamental re‐allocation of power resources in cohesion studies should comprise the entire network of implementation rather than the strategies of its individual component actors. 相似文献
8.
9.
10.