全文获取类型
收费全文 | 16444篇 |
免费 | 858篇 |
专业分类
各国政治 | 724篇 |
工人农民 | 561篇 |
世界政治 | 1239篇 |
外交国际关系 | 520篇 |
法律 | 10951篇 |
中国共产党 | 1篇 |
中国政治 | 84篇 |
政治理论 | 3148篇 |
综合类 | 74篇 |
出版年
2021年 | 92篇 |
2020年 | 286篇 |
2019年 | 338篇 |
2018年 | 365篇 |
2017年 | 443篇 |
2016年 | 446篇 |
2015年 | 386篇 |
2014年 | 388篇 |
2013年 | 1625篇 |
2012年 | 365篇 |
2011年 | 444篇 |
2010年 | 429篇 |
2009年 | 450篇 |
2008年 | 428篇 |
2007年 | 388篇 |
2006年 | 409篇 |
2005年 | 382篇 |
2004年 | 405篇 |
2003年 | 365篇 |
2002年 | 356篇 |
2001年 | 718篇 |
2000年 | 625篇 |
1999年 | 481篇 |
1998年 | 271篇 |
1997年 | 208篇 |
1996年 | 189篇 |
1995年 | 192篇 |
1994年 | 225篇 |
1993年 | 212篇 |
1992年 | 324篇 |
1991年 | 348篇 |
1990年 | 325篇 |
1989年 | 338篇 |
1988年 | 308篇 |
1987年 | 312篇 |
1986年 | 338篇 |
1985年 | 324篇 |
1984年 | 254篇 |
1983年 | 270篇 |
1982年 | 186篇 |
1981年 | 192篇 |
1980年 | 134篇 |
1979年 | 221篇 |
1978年 | 139篇 |
1977年 | 128篇 |
1976年 | 114篇 |
1975年 | 84篇 |
1974年 | 124篇 |
1973年 | 119篇 |
1972年 | 103篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
12.
13.
14.
Community-based delinquency prevention programs, designed to work with youth and families before they become involved with the official court process, are relatively rare. Likewise, few studies have been published concerninge valuative research on such programs. This article reviews some background on program concepts, describes the operations of the Oakland County Probate Court Youth Assistance casework services program, and reports the results of a comprehensive program evaluation project. The findings suggest that prevention programming is one effective strategy to aid in reducing the likelihood of more costly court interventions. Recommendations for program development are offered. 相似文献
15.
The lungs of 79 children who had died between the ages of 1 week and 2 years old were histologically examined. 59 of these children could be categorized as cases of Sudden Infant Death because of the history and postmortem findings. In the remaining 20 cases a definite cause of death could be established. This is the same collective on which the histological investigations of the lymphatic tissue has been carried out. Morphological changes which are typical for a virus pneumonia were found in a substantially higher frequency in the cases of Sudden Infant Death than in the control cases. The validity of these findings and their possible significance for the cause of death are discussed. 相似文献
16.
17.
18.
Restriction fragment length polymorphism (RFLP) analysis for the purpose of individualization is now being used in casework in the People's Republic of China. This report describes the use of the multilocus minisatellite probe 33.15 to solve three cases, including two homicides and a rape. In the third case, fetal tissue was analyzed to prove that the alleged rapist was, in fact, the father. In each case, analysis of deoxyribonucleic acid (DNA) resulted in a positive match. The probability of chance association of the DNA fingerprint was calculated as 5.6 x 10(-12), which is similar to the figures reported in the literature. 相似文献
19.
20.