全文获取类型
收费全文 | 11436篇 |
免费 | 604篇 |
专业分类
各国政治 | 558篇 |
工人农民 | 394篇 |
世界政治 | 800篇 |
外交国际关系 | 353篇 |
法律 | 7608篇 |
中国共产党 | 1篇 |
中国政治 | 60篇 |
政治理论 | 2200篇 |
综合类 | 66篇 |
出版年
2020年 | 200篇 |
2019年 | 218篇 |
2018年 | 257篇 |
2017年 | 302篇 |
2016年 | 296篇 |
2015年 | 277篇 |
2014年 | 255篇 |
2013年 | 1204篇 |
2012年 | 272篇 |
2011年 | 277篇 |
2010年 | 294篇 |
2009年 | 302篇 |
2008年 | 283篇 |
2007年 | 280篇 |
2006年 | 287篇 |
2005年 | 276篇 |
2004年 | 286篇 |
2003年 | 264篇 |
2002年 | 240篇 |
2001年 | 458篇 |
2000年 | 396篇 |
1999年 | 338篇 |
1998年 | 162篇 |
1997年 | 116篇 |
1996年 | 109篇 |
1995年 | 133篇 |
1994年 | 136篇 |
1993年 | 133篇 |
1992年 | 236篇 |
1991年 | 234篇 |
1990年 | 237篇 |
1989年 | 234篇 |
1988年 | 199篇 |
1987年 | 212篇 |
1986年 | 218篇 |
1985年 | 232篇 |
1984年 | 177篇 |
1983年 | 193篇 |
1982年 | 131篇 |
1981年 | 123篇 |
1980年 | 98篇 |
1979年 | 151篇 |
1978年 | 121篇 |
1977年 | 89篇 |
1976年 | 84篇 |
1975年 | 91篇 |
1974年 | 113篇 |
1973年 | 107篇 |
1972年 | 85篇 |
1969年 | 73篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
22.
This article addresses some of the implications of the EU's proposed Marine Strategy Directive for ongoing work in the regional seas conventions and for national work on regional marine strategies. The starting point is the proposed directive's focus on the ecosystem approach to the protection of the marine environment. Key elements within this approach are analysed, such as integration of environmental considerations into other policy areas; introduction of ecological quality objectives; and establishment of holistic monitoring and assessment programmes. Is it possible to transform these concepts into legally binding obligations? What will the implications of the proposed directive be for the rights and obligations of EU Member States under international law? A Management Plan for the Norwegian Part of the Barents Sea ('Barents Plan') was adopted by the Norwegian Government in March 2006 and approved by the Norwegian Storting (Parliament) in June 2006. It provides an example of a concrete application of the concepts in the proposed directive. Based on an analysis of the proposed Marine Strategy Directive and the Barents Plan, some key political and legal challenges are discussed in this article. 相似文献
23.
24.
25.
26.
Local government reforms in contemporary Russia are placed in the broader contexts of political reform under Putin and the historical relationship between local administration and the state. Reforms of local government thus help illuminate the architecture of contemporary state building in Russia and the degree to which contemporary Russia perpetuates political traditions. This study reviews the antecedent action in local government prior to the Putin era. It then examines the Kozak Commission and the new law on local government, assessing the strengths and weaknesses of these reforms. Finally, this study examines the challenges of implementing the reforms and what these challenges tell us about devolution and centralisation under Putin. 相似文献
27.
28.
A fatality following ingestion of the drug baclofen (Lioresal) is described. Baclofen was identified in urine by gas chromatography/mass spectrometry. After derivatization with trinitrobenzene sulfonic acid, baclofen was quantitated in serum and urine by high-performance liquid chromatography. The concentration of baclofen was 17 mg/L in serum and 760 mg/L in urine collected approximately 12 h after the overdose. To our knowledge, this is only the second reported fatality involving a baclofen overdose. The previous case did not include quantitation of baclofen in any biological fluid. 相似文献
29.
30.
Isolation of the DNA minisatellite probe MZ 1.3 and its application to DNA 'fingerprinting' analysis 总被引:1,自引:0,他引:1
U Schacker P M Schneider B Holtkamp E Bohnke R Fimmers H H Sonneborn C Rittner 《Forensic science international》1990,44(2-3):209-224
A minisatellite probe, MZ 1.3, detecting hypervariable fragment patterns was isolated from a human genomic library. A repetitive sequence of 27 bp length was identified which is contained in the probe approx. 40 times. The MZ 1.3 repeat shows variable homology of 53-73% to the repetitive sequence of the protein III gene of the bacteriophage M13 genome. Polymorphic restriction fragment patterns were found with MZ 1.3 using the enzymes Hinf I, BstN I, Hae III, Mbo I, PstI/Pvu II, and Rsa I. An average of 18 polymorphic fragments was observed using Hinf I as enzyme. The band sharing frequency after Hinf I digestion among unrelated individuals was determined to be 23.8 +/- 7.2%. An example for the application of MZ 1.3 to paternity testing in an incest case is given. The probe can be used with radioactive or non-radioactive detection systems. An approach is presented to compare polymorphic fragment patterns from individuals obtained by independent gel runs on the basis of relative band positions (RBP) and calculated in a computerized analysis. 相似文献