全文获取类型
收费全文 | 15148篇 |
免费 | 210篇 |
专业分类
各国政治 | 560篇 |
工人农民 | 1238篇 |
世界政治 | 736篇 |
外交国际关系 | 543篇 |
法律 | 8707篇 |
中国政治 | 42篇 |
政治理论 | 3459篇 |
综合类 | 73篇 |
出版年
2020年 | 80篇 |
2019年 | 103篇 |
2018年 | 1391篇 |
2017年 | 1329篇 |
2016年 | 1151篇 |
2015年 | 165篇 |
2014年 | 123篇 |
2013年 | 821篇 |
2012年 | 333篇 |
2011年 | 1066篇 |
2010年 | 1140篇 |
2009年 | 725篇 |
2008年 | 895篇 |
2007年 | 848篇 |
2006年 | 187篇 |
2005年 | 224篇 |
2004年 | 333篇 |
2003年 | 313篇 |
2002年 | 178篇 |
2001年 | 224篇 |
2000年 | 191篇 |
1999年 | 166篇 |
1998年 | 118篇 |
1997年 | 109篇 |
1996年 | 94篇 |
1995年 | 108篇 |
1994年 | 105篇 |
1993年 | 88篇 |
1992年 | 122篇 |
1991年 | 153篇 |
1990年 | 134篇 |
1989年 | 146篇 |
1988年 | 133篇 |
1987年 | 153篇 |
1986年 | 141篇 |
1985年 | 153篇 |
1984年 | 147篇 |
1983年 | 151篇 |
1982年 | 108篇 |
1981年 | 102篇 |
1980年 | 89篇 |
1979年 | 97篇 |
1978年 | 84篇 |
1977年 | 67篇 |
1976年 | 67篇 |
1975年 | 61篇 |
1974年 | 69篇 |
1973年 | 68篇 |
1972年 | 58篇 |
1969年 | 56篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
901.
902.
Allele frequencies for the eight STRs included in the GenePrint PowerPlex 1.2 kit were obtained from three population groups that are resident in the United Arab Emirates (UAE); 228 unrelated UAE individuals, 194 unrelated Indian individuals and 197 unrelated Pakistani individuals were analysed. 相似文献
903.
904.
905.
This study uses longitudinal data to identify risk markers for reassault among batterer program participants. Data are from 308 men and their partners collected at five, 3-month intervals. Time-varying situational and behavioral risk factors, as well as time-invariant individual characteristics, are examined. The most influential risk markers, in terms of relative risk and level of statistical significance, were time-varying: 2 measures of the man's drunkenness during the follow-up interval in which the reassault occurred (OR: 3.5-16.3; p > .0005). Other included time-varying batterer characteristics had no significant effect on reassault. Two significant time-invariant batterer risk factors were (1) severe psychopathology and (2) a history of non-domestic-violence arrest, both measured at intake. Results suggest that batterers' drinking behavior after program intake may provide an important and easily observed marker for risk of reassault and that prediction of reassault with individual risk factors at program intake remains problematical. 相似文献
906.
W. Bruggeman 《European Journal on Criminal Policy and Research》2001,9(3):283-290
Almost all European countries are member countries of Interpol, the World Customs Organisation and the United Nations. Some of them are Benelux and Schengen countries, and 15 are EU Member States. With this in mind, Europe can be considered, in policing terms, as being made up of a series of concentric and overlapping circles. The map shows overlapping institutional sources, territorial remits, functional specialisations and strategic emphasis. This article focuses on recent developments in European police co-operation, as well as judicial co-operation. International law enforcement co-operation is more and more influenced by basic political developments. Based on a rather complex, and sometimes confusing patchwork of institutions, there is a growing influence of intergovernmental based new developments. In particular prevention and combating organised crime are the main reasons for new and more professional ways of improved horizontal co-operation. 相似文献
907.
家兔死后眼玻璃体液锌、镍含量与 PMI关系的研究 总被引:6,自引:3,他引:3
目的寻找一种精确推定PMI的方法。方法应用电感耦合等离子体质谱(ICP-MS),检测了家兔死后96小时内眼玻璃体液锌、镍元素含量,探讨其与PMI的相关性。结果家兔死后24h内眼玻璃体液锌、镍元素含量与PMI显著相关,可作为推定早期PMI的参考指标,其二项式回归方程分别为y=0.1404x2-1.3351x+3.8298(R2=0.9202)、y=0.0043x2-0.0596x+0.2665(R2=0.9103)。结论家兔眼玻璃体液中Zn、Ni元素含量变化是推定早期PMI的参考指标之一。 相似文献
908.
909.
910.
John W. Stickels 《Journal of Police and Criminal Psychology》1999,14(2):48-59
A community policing program consisting of citizen input and problem solving techniques often results in a decision to police
places and translates into lower crime rates at the policed locations. Proponents of community policing programs believe that
they build social capital, which invests neighborhood citizens in the crime reduction efforts and reduces the simultaneous
occurrence of potential offenders and victims required for crimes to be committed. 相似文献