全文获取类型
收费全文 | 10139篇 |
免费 | 265篇 |
专业分类
各国政治 | 328篇 |
工人农民 | 326篇 |
世界政治 | 620篇 |
外交国际关系 | 304篇 |
法律 | 7139篇 |
中国政治 | 63篇 |
政治理论 | 1551篇 |
综合类 | 73篇 |
出版年
2020年 | 122篇 |
2019年 | 145篇 |
2018年 | 183篇 |
2017年 | 196篇 |
2016年 | 218篇 |
2015年 | 136篇 |
2014年 | 202篇 |
2013年 | 877篇 |
2012年 | 246篇 |
2011年 | 303篇 |
2010年 | 224篇 |
2009年 | 212篇 |
2008年 | 277篇 |
2007年 | 321篇 |
2006年 | 307篇 |
2005年 | 248篇 |
2004年 | 288篇 |
2003年 | 296篇 |
2002年 | 253篇 |
2001年 | 439篇 |
2000年 | 396篇 |
1999年 | 305篇 |
1998年 | 104篇 |
1997年 | 84篇 |
1996年 | 89篇 |
1995年 | 84篇 |
1994年 | 90篇 |
1993年 | 88篇 |
1992年 | 194篇 |
1991年 | 228篇 |
1990年 | 210篇 |
1989年 | 232篇 |
1988年 | 221篇 |
1987年 | 221篇 |
1986年 | 198篇 |
1985年 | 218篇 |
1984年 | 180篇 |
1983年 | 191篇 |
1982年 | 114篇 |
1981年 | 112篇 |
1980年 | 82篇 |
1979年 | 127篇 |
1978年 | 101篇 |
1977年 | 85篇 |
1976年 | 82篇 |
1974年 | 89篇 |
1973年 | 91篇 |
1972年 | 72篇 |
1971年 | 80篇 |
1970年 | 78篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
11.
The conventional wisdom in criminology is that adult onset of offending is a rare event. Closer examination of the extant literature that use official records, however, reveals that an average of 50 percent of adult offenders initiate offending at age eighteen or older. Although criminological research has investigated late onset offending in adolescence, there is little research on adult onset offending and the correlates of adult offending. Using police contact and interview data from the 1942 and 1949 birth cohort data from Racine, WI, this study investigated the correlates of crime for adult onset and persistent offenders. The results show that employment is the only correlate to affect the probability of adult offending differently for previously delinquent and nondelinquent offenders. This article concludes by highlighting the neglect of research on adult offenders, specifically the large percentage of adult onset offenders, and calling for more research on this topic. 相似文献
12.
轻型颅脑损伤ABR的纵向研究 总被引:3,自引:0,他引:3
目的 探索轻型颅脑损伤的电生理学指标 ,为早期临床诊断和预后判断以及法医学活体伤害鉴定提供依据。 方法 对相关病例进行脑干诱发电位 (ABR)的动态观察 ,并对结果进行统计学分析。 结果 6 0例轻型颅脑损伤患者伤后 48小时ABR的检测 ,显示主要异常表现为I-III峰间潜伏期的延长 ,说明此类损伤可造成脑干的功能紊乱。同时通过对其中 40例进行ABR追踪检测 ,结果显示大部分患者受伤三个月后脑功能状态恢复正常。 结论 轻型颅脑损伤ABR变化具有一定的特征 ,提示可作为早期临床诊断和预后判断以及法医学活体伤害鉴定的客观依据 ,应引起关注并展开进一步研究。 相似文献
13.
14.
15.
16.
17.
V I Bakhmet'ev I V Buromski? V N Kriukov M N Nagornov 《Sudebno-meditsinskaia ekspertiza》1991,34(4):11-17
Data on bone tissue fractography are summarized and systematized. Possibilities of a microscopic fractography method in analysis of skeletal bone fractures in order to determine conditions of traumatic exposure were shown. Destruction of bone tissue is considered from the point of view of fragile and tough destruction using as a model solid body with crack at the top of which deformations of detachment, lateral and longitudinal shifts are acting. Morphologic features for different types of destruction were singled out. Use of these features may help to determine character and type of deformation at concrete areas of fracture during all destruction process. 相似文献
18.
V.K. Sharma R.K. Jadhav G.J. Rao A.K. Saraf Heeresh Chandra 《Forensic Science International Supplement Series》1991,50(2)
A method has been developed on reverse phase high performance liquid chromatography for simultaneous determination of methyl, ethyl and isopropyl alcohols under refractive index detection using pure water as the mobile phase. A good separation has been achieved between these alcohols. Detector response was linear with a detection limit of 5 mg/100 ml. Recovery studies were performed by adding known amounts of methyl and ethyl alcohols to blood, lung and liver within the range 80–90%. The reproducibility of the results was always >90%. The quantitative distribution of methyl alcohol in postmortem body tissues and fluids has been reported in three cases of poisoning. 相似文献
19.
Jennifer P. Maxwell 《Journal of family violence》2003,18(5):281-293
This article examines the use of Eye Movement Desensitization and Reprocessing (EMDR) in helping a client address problems with persistent anxiety and a lack of self-esteem. During EMDR treatment, the client explored the dichotomous thinking that had plagued her since childhood, and correspondingly, the role of childhood physical and emotional abuse in her chronic feelings of inadequacy and anxiety. The client experienced significant improvement in her levels of anxiety and problems with self-esteem, both at the end of treatment and at 1-year follow up. Qualitative and quantitative data are utilized in this case study outlining the use of EMDR with a client diagnosed with dysthymic disorder. 相似文献
20.
Andrew P. Davidson 《Development in Practice》2007,17(1):39-50
The concern driving current debate on agricultural extension is increasingly that of how to help farmers learn how to deal with the complex world around them responsibly and profitably, in such a way that the extension worker is ancillary. This article seeks to deconstruct and provide a more reasoned assessment of agricultural extension services through a reflection on development paradigms, adult education, individual empowerment, and institutional pluralism. By calling into question the underlying ethical dimensions of agricultural extension, it is possible to develop an alternative paradigm and thereby generate new insights into it. The article concludes that the raison d'être of agricultural extension today must be to create an ethical basis which ensures that extension practices are more inclusive and thus responsive to the needs of farmers and other rural populations, integrating individual expectations into the wider socio-economic, cultural, political, and geographical environment. 相似文献