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   294篇
  免费   20篇
各国政治   19篇
工人农民   7篇
世界政治   24篇
外交国际关系   39篇
法律   159篇
中国共产党   1篇
中国政治   3篇
政治理论   60篇
综合类   2篇
  2024年   2篇
  2023年   11篇
  2022年   6篇
  2021年   12篇
  2020年   21篇
  2019年   21篇
  2018年   13篇
  2017年   20篇
  2016年   19篇
  2015年   13篇
  2014年   5篇
  2013年   50篇
  2012年   2篇
  2011年   11篇
  2010年   7篇
  2009年   6篇
  2008年   9篇
  2007年   4篇
  2006年   6篇
  2005年   7篇
  2004年   10篇
  2003年   3篇
  2002年   5篇
  2001年   4篇
  1999年   1篇
  1998年   1篇
  1997年   1篇
  1996年   3篇
  1992年   5篇
  1991年   2篇
  1990年   3篇
  1989年   2篇
  1988年   2篇
  1987年   3篇
  1986年   1篇
  1985年   2篇
  1984年   3篇
  1983年   1篇
  1982年   2篇
  1980年   4篇
  1979年   1篇
  1978年   2篇
  1977年   1篇
  1971年   1篇
  1970年   2篇
  1969年   1篇
  1968年   3篇
排序方式: 共有314条查询结果,搜索用时 46 毫秒
81.
While terrorism brings fear and chaos, tourism is the epitome of peace and happiness. Sri Lanka has always attracted international tourists due to tropical climate and beautiful tourist destinations. However, terrorism and the recent debt crisis have led to chaos and economic failure; in this study, the impact of terrorism, external debt, and military expenditure on international tourism in Sri Lanka have been empirically studied to unravel the dynamics. Dynamic ARDL simulation and cumulative fourier frequency causality results highlight the presence of an inverted N-shaped association between terrorism and tourism, as well as external debt and tourism. The phenomenal results from this analysis provide essential policy suggestions for Sri Lanka for economic recovery through the promotion of international tourism.  相似文献   
82.
In the midst of a genetic revolution in medicine, Assisted Reproductive Technology (ART) has become a well‐established technique to help infertile women achieve pregnancy. But many women are now turning to ART not just to circumvent infertility, but consciously to shape their families by determining the sex of their children. Many patriarchal cultures have a gender preference for males and to date have used technological advances in reproductive medicine to predetermine the sex of the child being born. Women have sought sex‐selective abortions, where the pregnancy was being terminated solely on the basis of the sex of the unborn fetus. The combination of ART advances and gender preference has led to the disappearance of at least 100 million girls from the world's population leading to a mass gendercide. This article examines the societal impact of unbalanced gender ratios and the need to regulate sex selection to avoid nations of bachelors.  相似文献   
83.
84.
85.
A major reason that The Netherlands has taken a different approach to the rest of the world on such a fundamental moral issue is that the courts and legislature in that country have accorded the interests of doctors a cardinal role in the euthanasia debate. This article argues that the interests of doctors are of only incidental and peripheral relevance in relation to the moral status of euthanasia. The moral status of euthanasia has little to do with the preparedness of doctors to administer the lethal injection or their general attitude towards the practice. Euthanasia is principally about the interests of the patient and the impact that the practice may have on the community in general, not preserving the conscience or improving the working life of doctors.  相似文献   
86.
87.
Allele frequency for the 9 STR loci (D3S1358, vWA, FGA, D8S1179, D21S11, D18S51, D5S818, D13S317, D7S820) were estimated from a total of 1096 individuals belonging to 27 endogamous populations from the state of Andhra Pradesh, India, covering the entire gamut of socio-economic variation of the linguistic region. These loci are found to be highly polymorphic within the populations with high levels of average heterozygosity (>0.80). However, the allele frequency distributions are fairly uniform across the populations in case of these loci suggesting relatively greater homogeneity among the populations. Regrouping populations into five broad socio-economic categories further reiterated the homogenous pattern of genetic diversity.  相似文献   
88.
Identification of human remains is an imperative element of any medicolegal investigation, and a challenging task for forensic experts and physical anthropologists worldwide. Three hundred adult hands (150 males and 150 females) belonging to south Indian population were studied to investigate sexual dimorphism of the index and ring finger ratio. The index and ring finger ratio is derived by dividing the index finger length by ring finger length. The index and ring finger ratio is found to be higher in females. Index and ring finger ratio < or =0.9700 identified 80% of males for both hands, and ratio >0.9700 identified 74% females for the right hand and 78% for the left hand accurately. This study may prove useful to determine the sex of an isolated hand when it is subjected for medicolegal examination.  相似文献   
89.
This article examines the microeconometric evidence on the impact of government support for R&D and innovation. Our meta‐regression analysis uses a dataset of empirical evidence on the effects of government R&D policies on innovation and investigates the factors that may explain the differences in the estimated effects. The meta‐analysis is structured to include both the direct and indirect government support for R&D and innovation. The estimated results reveal the heterogeneity of empirical studies with respect to the type of incentive, data, and econometric methodology used. The results indicate that the output additionality effect is on average stronger for R&D tax incentives than subsidies. Studies that use the subsample of high technology sector show a stronger additionality effect of fiscal incentives on innovation. Moreover, small and medium enterprises have a stronger input additionality effect. The results also suggest that studies considered endogeneity issues have on average stronger additionality effect.  相似文献   
90.
This study examines the price convergence across 28 Indian states and 7 union territories at an aggregate and subgroups level over the period 2011–12 to 2017–18. We employ a novel approach of Phillips and Sul panel convergence technique, which accounts for transitional dynamics and heterogeneity in the panel. The results suggest price divergence and evidence of clubs across Indian states at both aggregate and subgroup level. The outcomes of this study help policymakers in addressing the price dispersion across states, which in turn improves the market integration, allocation of resources, and standard of living.  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