全文获取类型
收费全文 | 5512篇 |
免费 | 200篇 |
专业分类
各国政治 | 322篇 |
工人农民 | 220篇 |
世界政治 | 409篇 |
外交国际关系 | 183篇 |
法律 | 3376篇 |
中国共产党 | 1篇 |
中国政治 | 91篇 |
政治理论 | 1074篇 |
综合类 | 36篇 |
出版年
2020年 | 87篇 |
2019年 | 97篇 |
2018年 | 123篇 |
2017年 | 150篇 |
2016年 | 135篇 |
2015年 | 125篇 |
2014年 | 118篇 |
2013年 | 574篇 |
2012年 | 192篇 |
2011年 | 194篇 |
2010年 | 132篇 |
2009年 | 120篇 |
2008年 | 174篇 |
2007年 | 151篇 |
2006年 | 152篇 |
2005年 | 151篇 |
2004年 | 165篇 |
2003年 | 150篇 |
2002年 | 134篇 |
2001年 | 190篇 |
2000年 | 172篇 |
1999年 | 132篇 |
1998年 | 70篇 |
1997年 | 60篇 |
1996年 | 45篇 |
1995年 | 57篇 |
1994年 | 55篇 |
1993年 | 53篇 |
1992年 | 92篇 |
1991年 | 93篇 |
1990年 | 108篇 |
1989年 | 88篇 |
1988年 | 85篇 |
1987年 | 84篇 |
1986年 | 105篇 |
1985年 | 109篇 |
1984年 | 76篇 |
1983年 | 79篇 |
1982年 | 50篇 |
1981年 | 47篇 |
1980年 | 44篇 |
1979年 | 48篇 |
1978年 | 56篇 |
1976年 | 35篇 |
1975年 | 47篇 |
1974年 | 61篇 |
1973年 | 55篇 |
1972年 | 42篇 |
1970年 | 34篇 |
1969年 | 41篇 |
排序方式: 共有5712条查询结果,搜索用时 15 毫秒
961.
People pay more and more attention to human rights protection today. The human rights protection in the system of criminal procedure distinctly emphasizes the principle of presumption 相似文献
962.
LIU BO a researcher at the Foreign Affairs Institute of the Beijing Academy of Social Sciences 《人权》2011,(6):24-28
Human rights,as a great term and lofty goal, have unquestionably become a topic of mainstream talk in the present-day world. 2 Such mainstream talk has been internalized into part of the social structure. The current international society is experiencing a profound reorganization and transition in values. all kinds of new interactions under the context of globalization have resulted in the development of the current norms of international human rights, 相似文献
963.
Kenneth F. Greene 《American journal of political science》2011,55(2):398-416
Despite ample evidence of preelection volatility in vote intentions in new democracies, scholars of comparative politics remain skeptical that campaigns affect election outcomes. Research on the United States provides a theoretical rationale for campaign effects, but shows little of it in practice in presidential elections because candidates’ media investments are about equal and voters’ accumulated political knowledge and partisan attachments make them resistant to persuasive messages. I vary these parameters by examining a new democracy where voters’ weaker partisan attachments and lower levels of political information magnify the effects of candidates’ asymmetric media investments to create large persuasion effects. The findings have implications for the generalizability of campaign effects theory to new democracies, the development of mass partisanship, candidate advertising strategies, and the specific outcome of Mexico's hotly contested 2006 presidential election. Data come primarily from the Mexico 2006 Panel Study. 相似文献
964.
This article uses data from the 2008 Cooperative Congressional Election Study to explain weak support for public financing of congressional campaigns. Previous studies lack theory to explain variation in support and use a flawed measure of the dependent variable. We argue that low support reflects a failure resulting from a collective action dilemma. Citizens desire a campaign finance system that weans politicians from private donors, but are unwilling to pay a small amount in taxes to support public financing. In contrast to conventional wisdom, we show that support for public financing is highest among those perceived to benefit the most from the current system. Our results suggest that most Americans would rather not pay for politics, and that reform proposals must avoid incurring transparent costs on individual citizens to pay for reform. 相似文献
965.
Richard F. Potthoff 《Public Choice》2011,148(1-2):67-86
For a single-winner multi-candidate election, it is broadly accepted that the Condorcet candidate (if one exists) should win. Voting systems do not always elect the Condorcet winner. Public opinion polls are not generally designed to try to identify a Condorcet candidate. They could easily be constructed to do so, however. The resulting process may be called Condorcet polling, for which various designs are presented herein. Information from Condorcet polling may enable some voters, under a plurality or runoff system, to bring about an outcome they prefer by voting strategically for the Condorcet candidate when they would not otherwise do so. 相似文献
966.
967.
3'-Hydroxystanosolol detection in biological fluids at pg levels by gas chromatography/tandem mass spectrometry is described. Gas chromatography/high resolution mass spectrometry results can be confirmed with gas chromatography/tandem mass-spectrometry. 相似文献
968.
Teixeira H Verstraete A Proença P Corte-Real F Monsanto P Vieira DN 《Forensic science international》2007,170(2-3):148-155
A fully validated, sensitive and specific method for the extraction and quantification of Delta(9)-tetrahydrocannabinol (THC) and 11-nor-9-carboxy-Delta(9)-THC (THC-COOH) and for the detection of 11-hydroxy-Delta(9)-THC (11-OH THC) in oral fluid, urine and whole blood is presented. Solid-phase extraction and liquid chromatography-mass spectrometry (LC-MS) technique were used, with electrospray ionization. Three ions were monitored for THC and THC-COOH and two for 11-OH THC. The compounds were quantified by selected ion recording of m/z 315.31, 329.18 and 343.16 for THC, 11-OH THC and THC-COOH, respectively, and m/z 318.27 and 346.26 for the deuterated internal standards, THC-d(3) and THC-COOH-d(3), respectively. The method proved to be precise for THC and THC-COOH both in terms of intra-day and inter-day analysis, with intra-day coefficients of variation (CV) less than 6.3, 6.6 and 6.5% for THC in saliva, urine and blood, respectively, and 6.8 and 7.7% for THC-COOH in urine and blood, respectively. Day-to-day CVs were less than 3.5, 4.9 and 11.3% for THC in saliva, urine and blood, respectively, and 6.2 and 6.4% for THC-COOH in urine and blood, respectively. Limits of detection (LOD) were 2 ng/mL for THC in oral fluid and 0.5 ng/mL for THC and THC-COOH and 20 ng/mL for 11-OH THC, in urine and blood. Calibration curves showed a linear relationship for THC and THC-COOH in all samples (r(2)>0.999) within the range investigated. The procedure presented here has high specificity, selectivity and sensitivity. It can be regarded as an alternative method to GC-MS for the confirmation of positive immunoassay test results, and can be used as a suitable analytical tool for the quantification of THC and THC-COOH in oral fluid, urine and/or blood samples. 相似文献
969.
Papin F Clarot F Vicomte C Gaulier JM Daubin C Chapon F Vaz E Proust B 《Forensic science international》2007,166(2-3):85-90
Superwarfarin exposure is a growing health problem, described in many countries. The authors report a case of suspicious chlorophacinone poisoning with a problematic diagnosis. They review the literature and discuss particularities of anticoagulant rodenticide intoxication, as well as the apparent contradiction between anticoagulant intoxication and lethal thrombosis. 相似文献
970.
Lociciro S Hayoz P Esseiva P Dujourdy L Besacier F Margot P 《Forensic science international》2007,167(2-3):220-228
Optimisation and harmonisation of analytical and statistical methodology have been carried out between two forensic laboratories (Lausanne, CH and Lyon, F) in order to provide drug intelligence for cross-border cocaine seizures. The aim was to improve the gas chromatographic analysis of cocaine samples for profiling. Some important validation parameters were tested to verify the developed method and demonstrate its profiling capacity: the selectivity of the method with retention time reproducibility, the choice of a derivatisation agent improving the chromatography (MSTFA, BSA, TMSI and BSTFA+TMCS 1%), the cutting agents influence (matrix effect), the influence of the sample storage conditions and the sample quantity to weigh for analyses. Eight main alkaloids, which represent the sample signature, have been selected: ecgonine methyl ester, ecgonine, tropacocaine, benzoylecgonine, norcocaine, cis- and trans-cinnamoylcocaine and 3,4,5-trimethoxycocaine. Their stability in the solvent used (CHCl(3)/pyridine) was demonstrated. In order to reach the final objective, which is the comparison of samples seized and analyzed in two different laboratories, the harmonisation of the profiling method between the two laboratories had to be ensured and is the subject of ongoing research. 相似文献