全文获取类型
收费全文 | 7633篇 |
免费 | 470篇 |
专业分类
各国政治 | 356篇 |
工人农民 | 243篇 |
世界政治 | 510篇 |
外交国际关系 | 270篇 |
法律 | 5239篇 |
中国政治 | 39篇 |
政治理论 | 1404篇 |
综合类 | 42篇 |
出版年
2020年 | 164篇 |
2019年 | 173篇 |
2018年 | 184篇 |
2017年 | 223篇 |
2016年 | 216篇 |
2015年 | 208篇 |
2014年 | 188篇 |
2013年 | 843篇 |
2012年 | 167篇 |
2011年 | 184篇 |
2010年 | 211篇 |
2009年 | 235篇 |
2008年 | 189篇 |
2007年 | 176篇 |
2006年 | 180篇 |
2005年 | 179篇 |
2004年 | 199篇 |
2003年 | 173篇 |
2002年 | 147篇 |
2001年 | 322篇 |
2000年 | 261篇 |
1999年 | 235篇 |
1998年 | 110篇 |
1997年 | 72篇 |
1996年 | 78篇 |
1995年 | 89篇 |
1994年 | 96篇 |
1993年 | 94篇 |
1992年 | 159篇 |
1991年 | 163篇 |
1990年 | 151篇 |
1989年 | 159篇 |
1988年 | 128篇 |
1987年 | 140篇 |
1986年 | 126篇 |
1985年 | 140篇 |
1984年 | 108篇 |
1983年 | 124篇 |
1982年 | 85篇 |
1981年 | 88篇 |
1980年 | 56篇 |
1979年 | 109篇 |
1978年 | 72篇 |
1977年 | 58篇 |
1976年 | 51篇 |
1975年 | 47篇 |
1974年 | 55篇 |
1973年 | 56篇 |
1972年 | 47篇 |
1968年 | 40篇 |
排序方式: 共有8103条查询结果,搜索用时 0 毫秒
121.
122.
H C Lee E M Pagliaro K M Berka N L Folk D T Anderson G Ruano T P Keith P Phipps G L Herrin D D Garner 《Journal of forensic sciences》1991,36(2):320-330
Deoxyribonucleic acid (DNA) was isolated from a number of spongy and compact human bone tissue specimens, and the yield was estimated on a "per milligram of starting tissue" basis. DNA was, in addition, isolated from a number of corresponding blood and bone tissue specimens. Spectrophotofluorometry and ethidium bromide visualization on minigels were used to estimate the quantity and degree of degradation of DNA. The DNA from several blood-bone pairs is shown to give concordant restriction fragment length polymorphism (RFLP) typing results by two different typing protocols with five different single-locus probes. DNA from several additional blood-bone pairs is shown to give concordant results for human leucocyte antigen (HLA)-DQ alpha phenotypes following polymerase chain reaction (PCR) amplification and hybridization to specific allele-specific oligonucleotide (ASO) probes, and for the variable numbers of tandem repeats (VNTR) length polymorphisms 3' to the human apolipoprotein B (APOB) gene following PCR amplification with specific primers and analysis of the products by electrophoresis and ethidium bromide visualization. 相似文献
123.
124.
This Article examines the issues and questions which underlie the debate over the admission of "medical treatises" into evidence. The admissibility of this type of evidence is at issue most often in litigation involving complex medico-legal issues. This article outlines the evidentiary basis for admission of medical treatises and discusses the quality of medical treatises in an effort to determine what value to the fact-finder these treatises actually hold. The authors contend that there is an inherent untrustworthiness associated with medical treatises, but do not go so far as to suggest that medical treatises should never be admitted. The Article concludes that there is a need for greater caution in determining admissibility and recommends safeguards to better guarantee trustworthiness and reliability. 相似文献
125.
Gail S. Goodman Murray Levine Gary B. Melton David W. Ogden 《Law and human behavior》1991,15(1):13-29
InMaryland v. Craig, the United States Supreme Court relied heavily on a brief prepared by a committee of the American Psychology-Law Society on behalf of the American Psychological Association (APA). The APA brief concluded that sexually abused children may be particularly vulnerable to distress in the legal process, especially when forced to confront the defendant face to face, and that such acute distress may be inconsistent with the state's interests in promotion of reliable testimony and child welfare. APA also argued that psychological theory and research provide foundations for individualized determination of the need for measures to protect children from face-to-face confrontation. *** DIRECT SUPPORT *** AFE06051 00002 相似文献
126.
Verduzco Chavez B 《Estudios demográficos y urbanos》1991,6(2):261-82, 477
The author applies the 1964 model developed by Stanislaw Czamanski, based on theories of urban growth and industrial localization, to the analysis of urban growth in Mexico. "The advantages of this model in its application as a support instrument in the process of urban planning when the information available is incomplete are...discussed...." Census data for 44 cities in Mexico are used. (SUMMARY IN ENG) 相似文献
127.
Simmons AB 《Estudios demográficos y urbanos》1991,6(1):5-31, 215
The author presents the case that the study of migration over the past century has become too diverse. He reviews works by writers from the several disciplines covering the topic, then cites the need to develop a consistent classification of the types of migration and their origins using standardized terminology. (SUMMARY IN ENG) 相似文献
128.
129.
130.