全文获取类型
收费全文 | 23388篇 |
免费 | 1263篇 |
专业分类
各国政治 | 1091篇 |
工人农民 | 1065篇 |
世界政治 | 1529篇 |
外交国际关系 | 776篇 |
法律 | 15659篇 |
中国共产党 | 2篇 |
中国政治 | 143篇 |
政治理论 | 4251篇 |
综合类 | 135篇 |
出版年
2020年 | 477篇 |
2019年 | 516篇 |
2018年 | 657篇 |
2017年 | 697篇 |
2016年 | 778篇 |
2015年 | 583篇 |
2014年 | 643篇 |
2013年 | 2478篇 |
2012年 | 590篇 |
2011年 | 629篇 |
2010年 | 647篇 |
2009年 | 667篇 |
2008年 | 651篇 |
2007年 | 659篇 |
2006年 | 675篇 |
2005年 | 562篇 |
2004年 | 549篇 |
2003年 | 498篇 |
2002年 | 523篇 |
2001年 | 875篇 |
2000年 | 761篇 |
1999年 | 637篇 |
1998年 | 317篇 |
1997年 | 247篇 |
1996年 | 261篇 |
1995年 | 251篇 |
1994年 | 240篇 |
1993年 | 239篇 |
1992年 | 404篇 |
1991年 | 436篇 |
1990年 | 423篇 |
1989年 | 399篇 |
1988年 | 424篇 |
1987年 | 403篇 |
1986年 | 449篇 |
1985年 | 427篇 |
1984年 | 353篇 |
1983年 | 330篇 |
1982年 | 243篇 |
1981年 | 234篇 |
1980年 | 199篇 |
1979年 | 319篇 |
1978年 | 189篇 |
1977年 | 156篇 |
1976年 | 127篇 |
1975年 | 172篇 |
1974年 | 199篇 |
1973年 | 156篇 |
1972年 | 129篇 |
1971年 | 117篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
121.
Ethanol was determined by gas chromatography in a variety of tissues and body fluids secured at autopsy in 61 cases. The specimens tested included right and left heart blood, femoral blood, pericardial fluid, cerebrospinal fluid, vitreous humor, urine, stomach contents, and brain. Statistical analysis of the cases revealed no significant differences among the various blood sites tested. However, the variations in blood ethanol concentrations among the various sampling sites within each case were as follows: 40 cases showed differences of less than 25%; 16 cases revealed variability between 25% and 50%, 4 cases had differences exceeding 50%. In one case, satisfactory blood analyses could not be accomplished. The larger variances occurred especially in those instances in which stomach alcohol concentration was 0.50% or greater. In one case, the variability amongst the different blood sites exceeded 400% (femoral blood--0.043%, right atrium--0.070%, root of aorta--0.156%); the brain was 0.050%, and the stomach contents was 1.2%. For all 61 cases, variances in blood alcohol content among the different sampling sites in a single cadaver ranged from 1.8 to 428%. 相似文献
122.
Dawn H. Currie 《Critical Criminology》1990,1(2):77-96
Within the context of legal reform, the Battered Wife Movement has divided feminists on the question of criminal justice as
a desirable component of a feminist agenda. Thus it provides a good example of the dilemmas of developing a feminist theory
about the state as the basis for informed practice. In this paper, Currie overviews the way in which the BWM has been transformed
from a radical demand for the redistribution of social power into an expansion of current patriarchal institutions. As an
example of the institutionalization of feminist issues, however, she rejects explanations of this transformation as simply
ideological revision by the state. Rather, Currie notes that it occurs through and not against feminist discourse, meaning
that we must acknowledge theory as practice if we are to develop a truly subversive and liberatory discourse within feminist
scholarship. 相似文献
123.
124.
Conclusion The Regulations appear to have reinforced the protection available to software producers under United Kingdom law. The provisions of the Software Directive and the Regulations are complex and not without significant inconsistencies which are likely to prove to be a source of litigation. The drafters of the Regulations chose, unlike many of its European partners, not to adopt the wording of the Software Directive but to write their own interpretation, adding an element of uncertainty to the law in this area, which is perhaps inevitable bearing in mind the linguistic problems of translating and interpreting any directive coupled with the ambiguity and omission of definitions of several key terms. More important, however, than any academic argument will be the practical impact of the new law and its effectiveness in achieving its aim. 相似文献
125.
126.
127.
Deoxyribonucleic acid (DNA) typing of ribosomal ribonucleic acid (rRNA) genes was performed with a polymerase chain reaction (PCR) assay for species identification. A variable region of the 28S ribosomal RNA gene was amplified with primers complementary to flanking sequences phylogenetically well conserved. The products of twelve animal DNAs (human, Japanese monkey, dog, cattle, pig, cat, rabbit, mouse, rat, chicken, frog, and fish) were separated by polyacrylamide gel electrophoresis, each revealing a few bands ranging from 150 to 100 base pairs. The band patterns obtained from each DNA sample differed in number and size, which indicates the applicability of the method to species identification. Samples containing either as little as 1 pg of DNA or degraded DNA of 0.2 to 0.5 kb in length were able to give detectable bands. Postmortem human tissue DNAs were tested as an example. They showed a pattern identical to the human control one, which was distinct from those of the other animals examined. 相似文献
128.
Policy analysis for the Congress is a timely subject. Several policy initiatives have emerged recently from the “first branch.” Others have demonstrated an independent capacity for analysis that is impressive by historical standards. This article introduces a practitioner symposium of three related works on policy analysis for Congress, with appropriate commentary by a distinguished veteran. It argues that because timing is crucial in the congressional policy process, anticipation and advance preparation are central to the effective use of analysis. The other articles illustrate the stages of advance preparation—of the policy analyst, the congressional environment, and the Member for voting—in the form of case studies. 相似文献
129.
O. M. Laleye Victor Ayeni 《International Journal of Politics, Culture, and Society》1993,6(4):555-571
Conclusion We have in this paper tried to set out a framework which can facilitate analysis of the current and future situation of traditional rulership in contemporary African society. Our presentation of a proposed model for such an analysis is no doubt still in its elementary stages of formation. Much more work needs to be done. Nevertheless, our analysis has revealed certain salient elements and uncovered certain unresolved issues. If traditional rulers genuinely care about their own future they will have to devise techniques of legitimation which not only endear them to the government and the non-traditional elites, but also, and more importantly, to the mass of the people. True, the original role of the traditional rulers may be no more; still, it may be possible to salvage what is left. 相似文献
130.
Threatening and otherwise inappropriate letters to members of the United States Congress 总被引:2,自引:0,他引:2
P E Dietz D B Matthews D A Martell T M Stewart D R Hrouda J Warren 《Journal of forensic sciences》1991,36(5):1445-1468
The authors examine the characteristics of threatening and otherwise inappropriate communications sent to members of the U.S. Congress by a sample of 86 subjects, 20 of whom threatened assassination. We quote excerpts from these letters and provide quantitative data on such variables as the volume, duration, form, and appearance of such communications; the enclosures; the subjects' perceived relationships to the recipients; the thematic content of the communications; and the messages and threats communicated. Comparisons between 43 subjects who pursued encounters with members of Congress and 43 who did not revealed 17 factors associated with such pursuit. In this population, threateners were significantly less likely to pursue an encounter than inappropriate letter writers who did not threaten, regardless of the type of threat or the harm threatened. Inappropriate letters to members of Congress are compared with those directed to Hollywood celebrities. Mentally disordered persons writing to public figures often mention and sometimes threaten public figures other than those to whom the letters are addressed, which raises important issues regarding notification of endangered third parties and the sharing of information among protective agencies. 相似文献