全文获取类型
收费全文 | 8100篇 |
免费 | 242篇 |
国内免费 | 6篇 |
专业分类
各国政治 | 376篇 |
工人农民 | 230篇 |
世界政治 | 545篇 |
外交国际关系 | 327篇 |
法律 | 4369篇 |
中国共产党 | 156篇 |
中国政治 | 327篇 |
政治理论 | 1568篇 |
综合类 | 450篇 |
出版年
2021年 | 66篇 |
2020年 | 107篇 |
2019年 | 110篇 |
2018年 | 159篇 |
2017年 | 152篇 |
2016年 | 144篇 |
2015年 | 129篇 |
2014年 | 144篇 |
2013年 | 774篇 |
2012年 | 197篇 |
2011年 | 261篇 |
2010年 | 277篇 |
2009年 | 263篇 |
2008年 | 301篇 |
2007年 | 310篇 |
2006年 | 346篇 |
2005年 | 256篇 |
2004年 | 194篇 |
2003年 | 200篇 |
2002年 | 202篇 |
2001年 | 263篇 |
2000年 | 187篇 |
1999年 | 167篇 |
1998年 | 100篇 |
1997年 | 93篇 |
1996年 | 69篇 |
1995年 | 77篇 |
1994年 | 73篇 |
1993年 | 83篇 |
1992年 | 120篇 |
1991年 | 150篇 |
1990年 | 131篇 |
1989年 | 144篇 |
1988年 | 131篇 |
1987年 | 151篇 |
1986年 | 142篇 |
1985年 | 148篇 |
1984年 | 134篇 |
1983年 | 139篇 |
1982年 | 100篇 |
1981年 | 94篇 |
1980年 | 89篇 |
1979年 | 94篇 |
1978年 | 75篇 |
1977年 | 58篇 |
1976年 | 66篇 |
1975年 | 61篇 |
1974年 | 69篇 |
1973年 | 67篇 |
1969年 | 56篇 |
排序方式: 共有8348条查询结果,搜索用时 15 毫秒
31.
32.
Report of an unusual finding of bones on the shore of the Baltic Sea. Although the morphological findings appeared similar to a human foot skeleton, a quick identification as sea dog bone was possible. 相似文献
33.
C Moore S Browne I Tebbett A Negrusz W Meyer L Jain 《Forensic science international》1992,56(2):177-181
A new solid-phase extraction procedure for the determination of cocaine and benzoylecgonine in amniotic fluid, using high flow co-polymeric sorbents is reported. The recoveries of cocaine and benzoylecgonine within the range 0.1-1 mg/l were 95.7% and 50.3%, respectively. The use of high-flow sorbents allowed the easy extraction of amniotic fluid regardless of sample viscosity or physical nature. The use of these solid-phase columns provided many advantages over the more commonly used solvent extraction, including an increase in extraction speed and efficiency, reduced operator time, reduced solvent use and disposal volumes and exceptional extract quality. Further, the determination of amniotic fluid obtained from pregnant cocaine users may provide important information about handling of cocaine by the fetus at various gestational ages. The procedure was successfully applied to amniotic fluid from suspected cocaine abusers. 相似文献
34.
35.
36.
This methodological paper presents the utility of survival analysis methods to provide age adjustment in the analysis of domestic violence data. These methods improve the estimation of lifetime probability of domestic violence, improve identification of patterns of first victimization over the lifespan, and provide methods of testing risk factors for first victimization while adjusting for the respondents' age. Most importantly, these methods allow a new investigation of recall bias. Results suggest that lifetime probability of abuse may have been substantially underestimated in previous studies because of problems in recall/disclosure encountered by middle-aged women. 相似文献
37.
Incarceration rates in the United States dramatically increased over the past several decades. This trend has drawn significant academic attention to prison overcrowding and its potential effect on inmate misconduct. The empirical relationship between inmate misconduct and overcrowding, however, is less than clear. To be sure, studies indicating positive, negative, and null relationships can all be found in the literature. The current research subjects this body of literature to a meta-analysis in an effort to: (1) clarify the direction and strength of the relationship between overcrowding and rates of prison misconduct across all studies, and (2) to uncover the degree to which variation in research outcomes can be attributed to methodological differences across studies. Results indicate that prison crowding has little substantive impact on inmate misconduct. Implications of the findings are discussed in detail. 相似文献
38.
韩振峰 《中共天津市委党校学报》2006,8(4):29-33
中国共产党的历史也就是把马克思主义基本原理同中国革命和建设实际相结合的历史。正是在这个历史发展过程中,毛泽东形成了理论联系实际的重要思想,并使之逐步确立为我们党的优良作风。毛泽东理论联系实际思想经历了萌芽、初步形成、逐步成熟、完善和发展等不同阶段。 相似文献
39.
韩德明 《铁道警官高等专科学校学报》2005,15(4):5-10
侦查破案概念应当从行为、认知、结果等3个角度进行界定。破案条件规定应当从侦查措施及 强制措施采取的合理性根据维度进行理解,即有关侦查措施和强制措施只有在案件事实调查、证据收集以及 犯罪嫌疑人确定程度等方面达到一定标准时方可以采取。破案的思维方法包括经验方法和逻辑方法两类。 破案的行为方法主要包括巡逻发现、物证分析、重点排查、秘密侦查、诱惑侦查等5种基本类型。 相似文献
40.
Charles B. Fleming Richard F. Catalano Monica L. Oxford Tracy W. Harachi 《Journal of Quantitative Criminology》2002,18(4):423-439
The social development model (SDM) is a theory of behavior that has proven useful in explaining the etiology of delinquency, violence, and substance use among adolescents as well as early antisocial behavior among pre-adolescents. A further test of the model is its generalizability across population groups. A section of the SDM representing prosocial influences in the etiology of problem behavior was compared for boys and girls and for children from low- and non low-income families using three waves of child, parent and teacher survey data on a sample of 851 elementary school students. Multiple group structural equation modeling was used to assess differences across groups in both measurement of model constructs and hypothesized structural paths between constructs. The results indicate overall similarity in the reliability of measurement models and validity of structural models. 相似文献