全文获取类型
收费全文 | 17491篇 |
免费 | 462篇 |
专业分类
各国政治 | 1010篇 |
工人农民 | 684篇 |
世界政治 | 1433篇 |
外交国际关系 | 758篇 |
法律 | 9813篇 |
中国共产党 | 2篇 |
中国政治 | 197篇 |
政治理论 | 3911篇 |
综合类 | 145篇 |
出版年
2020年 | 227篇 |
2019年 | 281篇 |
2018年 | 388篇 |
2017年 | 399篇 |
2016年 | 419篇 |
2015年 | 311篇 |
2014年 | 377篇 |
2013年 | 2153篇 |
2012年 | 427篇 |
2011年 | 537篇 |
2010年 | 422篇 |
2009年 | 447篇 |
2008年 | 499篇 |
2007年 | 477篇 |
2006年 | 446篇 |
2005年 | 393篇 |
2004年 | 451篇 |
2003年 | 448篇 |
2002年 | 404篇 |
2001年 | 695篇 |
2000年 | 650篇 |
1999年 | 534篇 |
1998年 | 277篇 |
1997年 | 247篇 |
1996年 | 210篇 |
1995年 | 193篇 |
1994年 | 183篇 |
1993年 | 183篇 |
1992年 | 318篇 |
1991年 | 334篇 |
1990年 | 304篇 |
1989年 | 304篇 |
1988年 | 309篇 |
1987年 | 305篇 |
1986年 | 305篇 |
1985年 | 275篇 |
1984年 | 253篇 |
1983年 | 278篇 |
1982年 | 183篇 |
1981年 | 168篇 |
1980年 | 136篇 |
1979年 | 184篇 |
1978年 | 138篇 |
1977年 | 113篇 |
1976年 | 115篇 |
1975年 | 105篇 |
1974年 | 120篇 |
1973年 | 109篇 |
1972年 | 100篇 |
1971年 | 99篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
41.
Marianne Junger Lynette Feder Joy Clay Sylvana M. Côté David P. Farrington Kate Freiberg Vicente Garrido Genovés Ross Homel Friedrich Lösel Matthew Manning Paul Mazerolle Rob Santos Martin Schmucker Christopher Sullivan Carole Sutton Tom van Yperen Richard E. Tremblay 《European Journal on Criminal Policy and Research》2007,13(3-4):327-356
42.
Panagiotis K. Staikouras Christos K. Staikouras Maria-Eleni K. Agoraki 《European Journal of Law and Economics》2007,23(1):1-27
Banks are “special” financial institutions generating distinct corporate governance challenges. The present paper examines
the relationship between two of the most pertinent corporate governance factors—that is, the size of the Board of Directors
and the proportion of non-executive directors—and firm performance on a sample of 58 large European banks over the period
2002–2004. The empirical analysis embraces a number of bank-specific variables. Our results reveal that bank profitability
is negatively related to the size of the Board of Directors, while the impact of Board composition, although positive in all
models, is, in most cases, insignificant. The results are robust after controlling for firm-specific variables.
相似文献
43.
Bernhard König 《Juristische Bl?tter》2007,129(12):804-810
Klagen gegen einen internationalen Sportverband, die auf Feststellung der Unwirksamkeit einer Sperre eines bei einem nationalen
Sportverband besch?ftigten Trainers von Wettbewerben dieses Sportverbandes und auf Unterlassung von Handlungen, die eine Akkreditierung
verhindern bzw erschweren, gerichtet sind, unterliegen der ausschlie?lichen inl?ndischen Gerichtsbarkeit des Sitzstaates;
eine Verbindung solcher Klagen mit einer gegen den nationalen Verband gerichteten gleichartigen Klage ist daher unzul?ssig.
– Eine damit zusammenh?ngende Schadenersatzklage gegen den internationalen Verband steht auch nicht in dem von Art 6 Nr 1
LGVü geforderten Zusammenhang mit einer Klage gegen den nationalen Verband wegen Aufl?sung des Trainervertrages aufgrund der
Sperre. 相似文献
44.
45.
46.
K. Minakata O. Suzuki Y. Ishikawa H. Seno M. Asano 《Forensic Science International Supplement Series》1991,50(2)
A simple and sensitive method is described for quantitative analysis of chlorpromazine in blood, serum, urine and tissue homogenate. The chlorpromazine cation radical produced by adding perchloric acid and 2,3-dichloro-5,6-dicyano-p-benzoquinone to the sample can be detected by the ESR method at room temperature. The sensitivity limit is 10 ng, that is, 20 μl of the solution containing 0.5 μg chlorpromazine/ml. The time needed for the measurement is within 10 min. The chlorpromazine radical thus produced is very stable; for example, 95% of the radical was observed after 24 h. The advantage of this method is discussed by comparing with the ordinary spectrophotometry which requires the purification of the sample. 相似文献
47.
Poppy seed ingestion as a contributing factor to opiate-positive urinalysis results: the Pacific perspective. 总被引:2,自引:0,他引:2
C M Selavka 《Journal of forensic sciences》1991,36(3):685-696
The possible contribution of poppy seed foods to positive opiate urinalysis results, especially from foods available in the Pacific Rim area, has recently become an issue for the U.S. Army Forensic Toxicology Drug Testing Laboratory in Hawaii. To assess the likelihood of this possible contribution, seven different poppy seed food products were consumed by male and female volunteers, and urine specimens were collected at time increments up to either 24 or 72 h. Specimens were evaluated for opiates using Roche Abuscreen radioimmunoassay (RIA), and all RIA positive specimens were analyzed for morphine and codeine using gas chromatography/mass spectrometry (GC-MS). Poppy seed cake, bagels, muffins, and rolls did not contain sufficient quantities of poppy seeds to give rise to opiate positive specimens by U.S. Department of Defense (DOD) GC-MS cutoff levels (morphine = 4000 ng/mL, codeine = 2000 ng/mL), although a number of specimens were positive by National Institute on Drug Abuse (NIDA) cutoff levels (morphine and codeine = 300 ng/mL). However, ingestion of poppy seed streusel or Danish pastry led to confirmed morphine and codeine positive specimens, irrespective of the use of DOD or NIDA confirmation cutoff values. In addition, significant amounts of codeine were observed in a number of these specimens. These findings argue against the unqualified application of previously published quantitative guidelines for eliminating poppy seed ingestion as a possible cause for a positive opiate urinalysis result. 相似文献
48.
Research has indicated that school factors such as communal school organization and student bonding are predictive of school disorder, with greater communal organization and greater student bonding leading to less delinquency and victimization. Data from a nationally representative sample of 254 public, nonalternative, secondary schools were used to examine structural equation models representing hypothesized relationships among communal school organization, student bonding, and school disorder. The hypothesis that communally organized schools would have less disorder held true for teacher victimization and student delinquency, but not for student victimization. In addition, the hypothesis that the relationship between communal school organization and school disorder would be mediated by student bonding was supported for student delinquency, but not for teacher victimization. 相似文献
49.
Laura K. Landolt 《Global Society》2007,21(3):393-414
To demonstrate that norms have independent causal power, constructivists de-emphasise material factors related to state interests and highlight social factors. Similarly, they conceptualise international organisations as autonomous from state influence, and focus on cases featuring non-state actors that stimulate a “tipping point” of norm diffusion among states in advance of state sponsorship. By contrast, this article utilises an historical materialist approach that admits both social and material data to examine the contrasting case of population control. It finds that US corporate foundations, eugenist demographers, feminist birth control activists and related NGOs conceptualised and promoted population control in the United States, at the United Nations, and across developing countries. However, the tipping point of norm diffusion occurred only after the United States publicly advocated population control. Indeed, material and social factors were inextricably bound together. 相似文献
50.