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   17515篇
  免费   1160篇
各国政治   702篇
工人农民   853篇
世界政治   1145篇
外交国际关系   536篇
法律   12284篇
中国共产党   2篇
中国政治   106篇
政治理论   2958篇
综合类   89篇
  2023年   77篇
  2021年   92篇
  2020年   432篇
  2019年   450篇
  2018年   573篇
  2017年   583篇
  2016年   661篇
  2015年   512篇
  2014年   536篇
  2013年   1804篇
  2012年   482篇
  2011年   507篇
  2010年   538篇
  2009年   566篇
  2008年   516篇
  2007年   504篇
  2006年   526篇
  2005年   440篇
  2004年   432篇
  2003年   357篇
  2002年   409篇
  2001年   675篇
  2000年   605篇
  1999年   480篇
  1998年   239篇
  1997年   174篇
  1996年   192篇
  1995年   190篇
  1994年   169篇
  1993年   176篇
  1992年   306篇
  1991年   313篇
  1990年   295篇
  1989年   276篇
  1988年   306篇
  1987年   262篇
  1986年   320篇
  1985年   316篇
  1984年   247篇
  1983年   226篇
  1982年   177篇
  1981年   154篇
  1980年   143篇
  1979年   219篇
  1978年   116篇
  1977年   92篇
  1975年   94篇
  1974年   124篇
  1973年   80篇
  1972年   78篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
Decomposition studies were conducted using two carcasses of domestic pigs, Sus scrofa L., 8.4 kg and 15.1 kg in weight, to determine the effects of carcass size on the rate of decomposition, composition of the arthropod fauna, and succession patterns. A total of 46 arthropod taxa were recovered during this study. No size-related differences were observed between carcasses with respect to composition of the arthropod fauna or patterns of succession. A greater number of arthropods were observed attracted to the 15.1-kg carcass, and the rate of decomposition observed was more rapid for the 15.1-kg carcass than for the 8.4-kg carcass. Internal temperatures of the 8.4-kg carcass were more directly related to external ambient temperatures during the fresh and bloated stages of decomposition. During the decay stage, both carcasses generated internal temperatures significantly above ambient temperatures. Following this stage, internal temperatures fell to approximate ambient temperatures during the postdecay and remains stages.  相似文献   
12.
13.
14.
The failure of forestry to contribute to poverty reduction in Central America is due to public policies which inhibit its profitability. Absence of public regulation of harvesting and competing subsidies to agriculture keep forestry stumpage prices artificially low. This encourages destruction of the forest resource, which damages both the environment and the potential to reduce poverty. A comparison of Costa Rica and Honduras reveals two dissimilar approaches toward forest policy. While Costa Rica attempts to raise producer and grower stumpage prices by tax credits, soft loans and differential species fees, Honduras enforces price ceilings and uses centralized authority to control forest production and export. Both countries exhibit weaknesses in the management control cycle of programming, budgeting, implementing and evaluating their forest policies. Yet the Costa Rican approach has increased stumpage prices already, which bodes well for their forest sector. By contrast, the major beneficiary of Honduran forest policy has been COHDEFOR, the state enterprise responsible for forestry management, controlling production, and running its national system of agroforestry cooperatives. Despite greater public authority and resources than the Costa Rican forest service (DGF), the Honduran forest policy is not likely to increase producer profitability or reduce poverty in the near future.  相似文献   
15.
Provincial governments in the Netherlands have only one general tax at their disposal. However, it has become an insufficient source of revenue for this level of government in the Dutch system. To increase the revenue raising capacity of the provincial governments, thirteen broad-based general tax proposals not used at the local level were examined. The objective was to find a fair and equitable tax that could easily be collected and would result in fl. 200 million in additional revenue for the provincial governments.  相似文献   
16.
17.
18.
Discussion of rape by soldiers as a form of persecution haslargely been directed towards the context of war or actual conflict.Nevertheless, there is a need for attention to be directed towardsthe phenomenon of rape within the military in the post-conflictperiod. This article discusses asylum claims presented in Norwayby Eritrean female soldiers claiming risk of persecution inthe form of sexual violence, rape, or torture within the military.First, presentation is made of the history of Eritrean women'sparticipation in the war of independence and the ensuing politicaland legislative gains won at the end of the war against Ethiopia.Review of Eritrea's report and responses to the Committee onthe Elimination of Discrimination Against Women (CEDAW) reveala state of backlash against women in the post-conflict period.Second, examination of how rape within the military and desertionmay fall under the criteria of the definition of a refugee accordingthe 1951 Convention on the Status of Refugees is pursued. Comparisonis drawn to instances of rape of women soldiers in the US andIsrael, as well as sexual violence by United Nations Missionin Ethiopia and Eritrea (UNMEE) peacekeepers, revealing commonchallenges affecting prevention and protection strategies. Third,a comparative review is conducted of evidentiary standards inorder to highlight the importance of maintaining a flexibleapproach responsive to the special circumstances of sexual violence.The Norwegian practice indicated a tendency to provide protectionfor compassionate grounds or humanitarian protection, ratherthan asylum. This resulted in non-recognition of the legitimacyof claims based on gender related persecution as requiring legalprotection under the 1951 Convention on the Status of Refugees.  相似文献   
19.
20.
One case of the erroneous administration of deslanoside and high level of drug in antemortem plasma and postmortem specimens has been reported owing to the unusual surrounding circumstances. Deslanoside in antemortem plasma was determined by FPIA and the analysis was done by HPLC in the postmortem tissue samples. The analytical results and methods used in the examinations are discussed in the following paper.  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