全文获取类型
收费全文 | 15407篇 |
免费 | 491篇 |
专业分类
各国政治 | 544篇 |
工人农民 | 1271篇 |
世界政治 | 654篇 |
外交国际关系 | 523篇 |
法律 | 9678篇 |
中国政治 | 39篇 |
政治理论 | 3149篇 |
综合类 | 40篇 |
出版年
2020年 | 162篇 |
2019年 | 176篇 |
2018年 | 1427篇 |
2017年 | 1381篇 |
2016年 | 1220篇 |
2015年 | 263篇 |
2014年 | 201篇 |
2013年 | 804篇 |
2012年 | 342篇 |
2011年 | 1070篇 |
2010年 | 1198篇 |
2009年 | 794篇 |
2008年 | 879篇 |
2007年 | 842篇 |
2006年 | 175篇 |
2005年 | 227篇 |
2004年 | 352篇 |
2003年 | 297篇 |
2002年 | 163篇 |
2001年 | 315篇 |
2000年 | 261篇 |
1999年 | 230篇 |
1998年 | 107篇 |
1997年 | 78篇 |
1996年 | 87篇 |
1995年 | 114篇 |
1994年 | 112篇 |
1993年 | 91篇 |
1992年 | 155篇 |
1991年 | 159篇 |
1990年 | 149篇 |
1989年 | 163篇 |
1988年 | 131篇 |
1987年 | 140篇 |
1986年 | 131篇 |
1985年 | 133篇 |
1984年 | 114篇 |
1983年 | 126篇 |
1982年 | 90篇 |
1981年 | 79篇 |
1980年 | 57篇 |
1979年 | 116篇 |
1978年 | 78篇 |
1977年 | 65篇 |
1976年 | 53篇 |
1975年 | 49篇 |
1974年 | 55篇 |
1973年 | 56篇 |
1972年 | 44篇 |
1968年 | 41篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
981.
Although the topic of recidivism invariably elicits much interest, there appears to be considerable conflict and uncertainty as to even crude estimates of the recidivism rate for persons released from prison. The purpose of this research was to examine the extent to which this apparent confusion may be explained by different methodological choices of criterion measure or length of follow-up. Through the cooperation of the Federal Bureau of Investigation, rap sheet follow-up information for a six-year period was obtained for a relatively large random sample of federal prisoners released in 1970. This data enabled calculation of recidivism rates using various criterion measures and follow-up periods applied to the same sample. The effect of varying these definitions on the recidivism rate obtained can then be directly observed. 相似文献
982.
983.
984.
The technique of isoelectric focusing in ultra-thin polyacrylamide gels as a method of typing human red cell phosphoglucomutase (PGM1) has been studied. Typing was possible without the samples attaining true equilibrium focusing conditions. The isozyme patterns so obtained were clearly defined and free from distortion. The importance of assessing relative band intensities when interpreting the isozyme patterns is discussed. Our experience of using the technique to analyse casework material is described. 相似文献
985.
986.
987.
988.
In recent times, juvenile rehabilitation has been attacked both by liberals seeking to insert greater due process rights and protections into the juvenile justice system and by conservatives calling for more stringent handling of serious youthful offenders. The apparent pervasiveness of this attack raises the question, Is the philosophy of child saving dead? Data drawn from a survey conducted in Illinois suggest, however, that juvenile rehabilitation continues to receive support both from the public and from various groups associated with criminal justice practice and policy making. At the same time, there is also support for the notion that young criminals are responsible for their actions and are currently being treated too leniently by our courts. Finally, child saving is embraced most firmly by judges, lawyers, correctional administrators, and prison inmates and least strongly by legislators, prison guards, and the general public. 相似文献
989.
990.
Linda B. Nilson 《政策研究评论》1985,4(4):689-697
One of the greatest disaster relief resources available to emergency management officials is the disaster victim community. Contrary to a popular image of social and psychological breakdown in the aftermath of a sudden catastrophic event, impacted communities do respond rationally and adaptively. Recommendations are advanced for utilizing community groups in pre-disaster planning and in relief operations used during the emergency period. 相似文献