首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   287篇
  免费   16篇
各国政治   17篇
工人农民   30篇
世界政治   29篇
外交国际关系   14篇
法律   143篇
中国政治   2篇
政治理论   65篇
综合类   3篇
  2022年   2篇
  2020年   8篇
  2019年   2篇
  2018年   10篇
  2017年   14篇
  2016年   11篇
  2015年   6篇
  2014年   5篇
  2013年   45篇
  2012年   12篇
  2011年   5篇
  2010年   8篇
  2009年   9篇
  2008年   5篇
  2007年   11篇
  2006年   17篇
  2005年   9篇
  2004年   13篇
  2003年   8篇
  2002年   11篇
  2001年   9篇
  2000年   9篇
  1999年   5篇
  1998年   5篇
  1997年   5篇
  1996年   3篇
  1995年   2篇
  1994年   4篇
  1993年   4篇
  1992年   2篇
  1991年   5篇
  1990年   3篇
  1988年   4篇
  1987年   1篇
  1986年   1篇
  1985年   1篇
  1984年   2篇
  1983年   8篇
  1982年   1篇
  1981年   2篇
  1980年   1篇
  1979年   3篇
  1978年   1篇
  1977年   2篇
  1975年   1篇
  1974年   2篇
  1973年   1篇
  1971年   1篇
  1970年   1篇
  1969年   1篇
排序方式: 共有303条查询结果,搜索用时 46 毫秒
101.
This paper analyses the impact of a low-cost land certification programme on the productivity of female-headed households. The hypotheses tested in the paper emphasise on the interaction between the constraints that female-headed households face in terms of insecure land tenure, lack of productive resources and suboptimal land market participation, on the one hand, and the tenure security benefits of certification on the other. Our findings show that land certification has a positive effect on land market participation and productivity. Our analysis also suggests higher marginal effects of certification on female-headed households’ productivity, compared to the male ones.  相似文献   
102.
It is generally held that one mechanism to enable inclusive growth in Tanzania is enabling farmers to access credit to raise productivity and incomes. The formalisation of property rights in Tanzania is being undertaken by a multiplicity of actors at great expense to donors, individuals and the government. While there have been a variety of different justifications for allocating Certificates of Customary Rights of Occupancy (CCROs) to farmers in Tanzania, perhaps the most prominent argument is that it will enable farmers to finally overcome the divide between ‘informal’ customary rights and the formal banking sector. CCROs would provide the collateral that would induce banks to lend money to small-scale farmers. As part of a six-year investigation in Manyara, Mbeya and Dodoma regions, our research team evaluated the impact of formalisation on farmers’ access to credit. The paper will present the results while pointing to the continuing institutional and market imperfections that perpetuate the formal divide.  相似文献   
103.
Prior research suggests that being abused during childhood significantly increases one’s risk for the involvement in violent intimate relationships across the life course. The current study contributes to the literature by using a large sample of college students to explore the moderating effects of race and gender on the relationship between child abuse and later experiences of intimate partner violence. Results indicate that for both men and women, child abuse increases the risk for dating violence. Findings also suggest that specific race and gender combinations moderate the relationship between child abuse and later experiences of IPV, specifically regarding the risk for mutual or bidirectional violence. Implications for prevention and intervention and directions for future research are discussed.  相似文献   
104.
A detailed, correlative, histologic evaluation of postmortem changes in the nasal mucosa of chronic cocaine users has shown characteristic mucosal and arteriolar changes as well as typical perivascular and subepithelial alterations compatible with chronic inflammation. These findings confirm and extend recent reports on the effects of cocaine in the coronary circulation and heart muscle as well as provide a new diagnostic tool to the forensic pathologist who suspects that a decedent has been a long-term cocaine abuser.  相似文献   
105.
106.
107.
A general toxicology unknown case is presented to demonstrate our systematic approach. A 20-year-old male was found dead with multiple suicide notes. Overdose was suspected but substances were not known. Blood alcohol was negative. Urine was analyzed by enzyme-multiplied immunoassay technique and was negative for all drugs assayed. Urine was then extracted with ethyl acetate:hexane (1:1) at pH 10 and back-extracted into 1.0N sulfuric acid. The acidic layer was adjusted to pH 10, and re-extracted with ethyl acetate:hexane (1:1). The residue was analyzed by gas chromatography (GC) on a 3% OV-101 column. It was found to be negative for all commonly screened substances. However, several unknown peaks were observed. Electron impact mass spectra of these unknown peaks were obtained and searched for in our computer library of more than 25000 mass spectra. These unknown peaks were identified as doxylamine and pyrilamine by gas chromatography/mass spectrometry. The base peak and molecular ion for pyrilamine were at m/z 121 and 285, respectively. The base peak for doxylamine was at m/z 58. No molecular ion was observed for doxylamine. Both doxylamine and pyrilamine are antihistamines, but are promoted and used in the management of insomnia. Quantitation was performed on a GC using dexbrompheniramine as an internal standard. Blood concentrations for doxylamine and pyrilamine were 0.7 and 7.0 mg/L, respectively. Concentrations in other tissues were determined. Death was caused by combined doxylamine and pyrilamine intoxication; the manner of death was suicide.  相似文献   
108.
109.
There is a renewed interest in whether land reforms can contribute to market development and poverty reduction in Africa. This paper assesses effects on the allocative efficiency of the land rental market of the low-cost approach to land registration and certification of restricted property rights that was implemented in Ethiopia in the late 1990s. Four rounds of a balanced household panel from 16 villages in northern Ethiopia are analysed, showing that land certification initially enhanced land rental market participation of (potential) tenant and landlord households, especially those that are headed by females.  相似文献   
110.
Extant research regarding juvenile transfer has focused primarily on the negative effects of current policies, with little consistent and rigorous work on the variation among the adolescents transferred to adult court and their later adjustment in the community. Using a sample of 193 transferred youth from Arizona, we consider how certain individual characteristics are related to four post-release outcomes (antisocial activity, re-arrest, re-institutionalization, and gainful activity). We find considerable variability in outcomes, with adjustment significantly and consistently related to certain legal and risk-need factors. These results indicate that some transferred youth may experience negative outcomes, and that refinements to transfer policy may benefit from consideration of these factors in determining which serious adolescent offenders are most appropriate for transfer.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号