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   10828篇
  免费   602篇
各国政治   431篇
工人农民   378篇
世界政治   827篇
外交国际关系   326篇
法律   7289篇
中国共产党   1篇
中国政治   58篇
政治理论   2080篇
综合类   40篇
  2021年   64篇
  2020年   201篇
  2019年   248篇
  2018年   244篇
  2017年   309篇
  2016年   310篇
  2015年   249篇
  2014年   286篇
  2013年   1042篇
  2012年   238篇
  2011年   316篇
  2010年   296篇
  2009年   309篇
  2008年   302篇
  2007年   273篇
  2006年   291篇
  2005年   261篇
  2004年   266篇
  2003年   238篇
  2002年   246篇
  2001年   471篇
  2000年   425篇
  1999年   301篇
  1998年   190篇
  1997年   157篇
  1996年   126篇
  1995年   121篇
  1994年   156篇
  1993年   135篇
  1992年   200篇
  1991年   220篇
  1990年   205篇
  1989年   214篇
  1988年   209篇
  1987年   195篇
  1986年   236篇
  1985年   210篇
  1984年   164篇
  1983年   172篇
  1982年   118篇
  1981年   123篇
  1980年   88篇
  1979年   136篇
  1978年   74篇
  1977年   74篇
  1976年   70篇
  1974年   73篇
  1973年   70篇
  1972年   66篇
  1970年   46篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
941.
942.
The literature on the rural credit market in India (and elsewhere) has generally assumed that peasant farm households are rationed in their access to subsidized formal credit. Because of a lack of infrastructure and poor access to institutional credit, such farmers are exploited by means of an interlocked market connecting informal credit to the sale of paddy. The resulting gap, between the sale by a borrower of paddy at a predetermined low price, and the price of this commodity on the open market, constitutes the amount of what is termed a distress sale. The latter is itself influenced by the bargaining capacity (or lack thereof) of the peasant farmer who borrows on the informal market. Also of importance in determining whether or not a cultivator is compelled to resort to the informal credit market – and thus into an interlocked arrangement – is the need for additional liquidity to meet production costs and/or household consumption, as well as the monopsony nature of the paddy market. Data from Kalahandi district in Orissa suggest that access to formal credit is limited in rural areas although there exists a high demand for it, that a high degree of credit rationing by the formal lender occurs, and that poor implementation by the state of minimum support price policy all contribute to the need for informal loans and its attendant interlinkage.  相似文献   
943.
944.
945.
Zusammenfassung Nach einer Entscheidung des Bayerischen Verfassungsgerichtshofs kann ein Bauleitplan wegen Versto? gegen das Willkürverbot aus Gründen des Umweltschutzes nichtig sein. Diese auf eine Popularklage ergangene Entscheidung er?ffnet die Frage, ob der Verfassungsgrundsatz des Willkürverbots auch im Rahmen von Verwaltungsakten herangezogen werden kann. Der Beitrag bejaht diese M?glichkeit.  相似文献   
946.
947.
The legislative process in the tax field and the administrative process for the issuance of regulatory and interpretative material by the Treasury Department are closely coordinated. The same persons and interests both inside and outside of Government are involved in both processes. There is thus continuity of expertise, understanding of what is at stake, adversary viewpoints, and Washington knowhow. The preparation of administrative material within the Treasury is a task for those technical personnel and policy officials who in varying degrees also have a voice in the preparation of the Treasury's legislative position and the legislative development of statutory language. The outside forces who watch legislative activity also closely watch administrative activity and seek to shape the latter just so they do the former. The response of the Treasury is much the same in both situations, and governed by the policies, attitudes and predilections of tax policy officials and career personnel.  相似文献   
948.
A longitudinal study of 25 families, with children aged 14 months—5 years, in joint custody, is reported. Varying motivations that lead divorcing parents to undertake and sustain joint custody are discussed, together with the stresses and gratifications of these arrangements for the parents and children. Findings are that where both parents are motivated primarily by interest in the child, where the parenting is sensitive and where the child is shielded from interparental conflict, young children do well. Such families were not the majority in this study. Significant differences emerged in the adjustment of the 1–3 age group as compared with the 3–5 age group which point to greater difficulties for the 3–5 year-olds.  相似文献   
949.
DNA profiling evidence presented in court should be accompanied by a reliable estimate of its evidential weight. In calculating such statistics, allele frequencies from commonly employed autosomal microsatellite loci are required. These allele frequencies should be collected at a level that appropriately represents the genetic diversity that exists in the population. Typically this occurs at broadly defined bio-geographic categories, such as Caucasian or Asian. Datasets are commonly administered at the jurisdictional level. This paper focuses on Australian jurisdictions and assesses whether this current practice is appropriate for Aboriginal Australian and Caucasian populations alike. In keeping with other studies we observe negligible differences between Caucasian populations within Australia when segregated geographically. However segregation of Aboriginal Australian population data along contemporary State and Territory lines appears to mask the diversity that exists within this subpopulation. For this reason datasets collated along more traditional lines may be more appropriate, particularly to distinguish the most genetically differentiated populations residing in the north of the continent.  相似文献   
950.
We describe the forensic science application of a method for quantification of human genomic deoxyribonucleic acid (DNA). The two cases cited in this report involve DNA samples extracted from skin tissue and bloodstained clothing recovered from different crime scenes. High-molecular-weight DNA was recovered from both specimens, and the concentrations of these DNAs were estimated to be approximately 0.5 microgram/microL by ethidium bromide/agarose gel electrophoresis. Using the human-specific DNA probe p17H8 (locus D17Z1) to quantify the amount of human genomic DNA in these samples, it is shown that less than 1% of the DNA isolated from the skin tissue is of human origin and that the DNA isolated from the bloodstained clothing is effectively devoid of human DNA sequences. These case examples illustrate the need to quantify not only the total amount of DNA recovered from forensic casework material, but also the proportion of the DNA that is of human origin.  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