全文获取类型
收费全文 | 29269篇 |
免费 | 844篇 |
专业分类
各国政治 | 1479篇 |
工人农民 | 1694篇 |
世界政治 | 1982篇 |
外交国际关系 | 1174篇 |
法律 | 16891篇 |
中国共产党 | 4篇 |
中国政治 | 213篇 |
政治理论 | 6520篇 |
综合类 | 156篇 |
出版年
2021年 | 125篇 |
2020年 | 352篇 |
2019年 | 408篇 |
2018年 | 1671篇 |
2017年 | 1698篇 |
2016年 | 1544篇 |
2015年 | 541篇 |
2014年 | 551篇 |
2013年 | 2548篇 |
2012年 | 688篇 |
2011年 | 1519篇 |
2010年 | 1479篇 |
2009年 | 1144篇 |
2008年 | 1318篇 |
2007年 | 1207篇 |
2006年 | 569篇 |
2005年 | 579篇 |
2004年 | 695篇 |
2003年 | 659篇 |
2002年 | 493篇 |
2001年 | 822篇 |
2000年 | 768篇 |
1999年 | 607篇 |
1998年 | 380篇 |
1997年 | 306篇 |
1996年 | 286篇 |
1995年 | 286篇 |
1994年 | 299篇 |
1993年 | 266篇 |
1992年 | 367篇 |
1991年 | 393篇 |
1990年 | 363篇 |
1989年 | 372篇 |
1988年 | 376篇 |
1987年 | 357篇 |
1986年 | 408篇 |
1985年 | 346篇 |
1984年 | 317篇 |
1983年 | 338篇 |
1982年 | 229篇 |
1981年 | 196篇 |
1980年 | 187篇 |
1979年 | 236篇 |
1978年 | 177篇 |
1977年 | 157篇 |
1976年 | 144篇 |
1974年 | 138篇 |
1973年 | 119篇 |
1972年 | 119篇 |
1971年 | 101篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
161.
162.
A report of an international collaborative experiment to demonstrate the uniformity obtainable using DNA profiling techniques. 总被引:2,自引:0,他引:2
P Gill S Woodroffe W B?r B Brinkmann A Carracedo B Eriksen S Jones A D Kloosterman B Ludes B Mevag 《Forensic science international》1992,53(1):29-43
This paper describes a collaborative exercise intended to demonstrate whether uniformity of DNA profile results could be achieved between different European laboratories. It was shown that this goal can be obtained provided that a common protocol is followed (specifically the use of a common electrophoretic buffer as being the most important parameter). Generally, lower molecular weight loci (with lower molecular weight fragments) such as YNH24 perform better than higher molecular weight loci such as MS43a. The results of the exercise are discussed in relation to the objectives of the European DNA profiling group (EDNAP). 相似文献
163.
N C Martin A A Pirie L V Ford C L Callaghan K McTurk D Lucy D G Scrimger 《Science & justice》2006,46(3):179-184
In the forensic science laboratory, the recovery of spermatozoa from vaginal swabs, or vaginal cells from penile swabs, can help determine if sexual intercourse may have taken place. There are several methods used to recover spermatozoa and cells from the swabs before visualisation on a microscope slide and most of these methods use water. Phosphate buffered saline (PBS) is a non-toxic solution used in many biological laboratories. Unlike water, PBS prevents cells rupturing or shrivelling up due to osmosis. This study demonstrates that PBS can be used for the extraction of spermatozoa and cells from swabs and that PBS does not affect subsequent DNA profiling. 相似文献
164.
Devra C. Moehler 《Studies in Comparative International Development (SCID)》2007,42(1-2):164-190
Can participatory programs in transitioning countries increase the involvement of citizens beyond the level expected from individual-level characteristics, such as demographic traits, socioeconomic resources, and civic orientations? To answer this question, I examine the causes of participation in the Ugandan constitution-making process. Statistical analysis of a random sample survey of 820 citizens demonstrates that although individual-level factors play a role, many Ugandans participated because mobilizing agents pulled them into the process. I argue that programs to encourage active and equal participation will be most successful if they supplement weak indigenous institutions of mobilization and help all types of citizens to participate early on in the transition to democracy. 相似文献
165.
Sixteen major evaluations of programs to prevent school bullying, conducted in 11 different countries, are reviewed in detail. Of these 16 evaluations, 8 produced desirable results, 2 produced mixed results, 4 produced small or negligible effects, and 2 produced undesirable results. These varying findings may reflect variations in programs, in implementation, in assessment methods, or in evaluation designs. It is concluded that high-quality evaluations are needed in the future, with randomized designs, theoretically grounded interventions, multiple measures of bullying, and attempts to disentangle the effectiveness of different program components. 相似文献
166.
Peter Bridges 《Diplomacy & Statecraft》2005,16(2):251-257
The Hunter family of Rhode Island produced two important American diplomatists of the nineteenth century. The elder William Hunter served for nine years as the American envoy to Brazil, where he exerted positive influence over the young emperor, Dom Pedro II. The younger William Hunter entered the Department of State in 1829 and spent fifty-seven years there under twenty-one Secretaries of State. For decades the department's third-ranking officer, he became its “mentor and authority.” The overlapping careers of Hunter and his two successors helped guide American diplomacy until 1937. 相似文献
167.
MICHAEL S. ROCCA 《Legislative Studies Quarterly》2003,28(4):529-550
This article examines the extent to which changes in distributional benefits influence congressional election outcomes. Although conventional wisdom holds that a direct link exists between distributional benefits and electoral outcomes (Mayhew 1974b), recent evidence suggests that this link only exists under certain circumstances (Stein and Bickers 1994). In this article, I use 1995 military base closures to test the nature of the relationship. Contrary to recent research on the politics of pork barreling, my findings indicate support for a direct relationship between major base realignments and closures and House electoral outcomes. Specifically, major realignments and closures significantly decreased first‐year Democrats' vote margins in the 1996 House elections. 相似文献
168.
Michael S. King 《Ratio juris》2003,16(3):399-415
Abstract. Western natural law theory emphasises the derivation of principles of right action said to be universal and objective from the application of practical reasonableness to the pursuit of basic human goods that are self‐evident or based on human nature. Critics say its methodology is inherently subjective. In contrast, the Vedic approach to natural law of the Bhagavad‐Gita emphasises the full development of a universal aspect of human nature—consciousness—to promote right action. A healthy person with a developed intellect, clear mind, balanced emotions and full perception is best placed to fulfil his or her society's highest ideals of ethical and lawful conduct. The Vedic approach advocates a supportive social environment and the use of meditation techniques to promote such development. Research has found that the Transcendental Meditation (TM) program promotes improvement in mind, body and behaviour. For example, offenders in Australia, the United States and Senegal practising the technique experienced decreased substance abuse and recidivism and improved wellbeing. From a scientific perspective, TM promotes these improvements by producing a unique psychophysiological state of restful alertness that dissolves stress that blocks the unfoldment of full potential in life. 相似文献
169.
170.
Law and Philosophy - 相似文献