全文获取类型
收费全文 | 21264篇 |
免费 | 1298篇 |
专业分类
各国政治 | 929篇 |
工人农民 | 935篇 |
世界政治 | 1550篇 |
外交国际关系 | 758篇 |
法律 | 13799篇 |
中国共产党 | 2篇 |
中国政治 | 124篇 |
政治理论 | 4335篇 |
综合类 | 130篇 |
出版年
2021年 | 110篇 |
2020年 | 475篇 |
2019年 | 501篇 |
2018年 | 654篇 |
2017年 | 680篇 |
2016年 | 789篇 |
2015年 | 584篇 |
2014年 | 608篇 |
2013年 | 2404篇 |
2012年 | 586篇 |
2011年 | 598篇 |
2010年 | 635篇 |
2009年 | 668篇 |
2008年 | 604篇 |
2007年 | 618篇 |
2006年 | 644篇 |
2005年 | 541篇 |
2004年 | 532篇 |
2003年 | 457篇 |
2002年 | 507篇 |
2001年 | 739篇 |
2000年 | 683篇 |
1999年 | 546篇 |
1998年 | 331篇 |
1997年 | 245篇 |
1996年 | 239篇 |
1995年 | 257篇 |
1994年 | 227篇 |
1993年 | 238篇 |
1992年 | 372篇 |
1991年 | 362篇 |
1990年 | 345篇 |
1989年 | 336篇 |
1988年 | 362篇 |
1987年 | 328篇 |
1986年 | 377篇 |
1985年 | 390篇 |
1984年 | 304篇 |
1983年 | 273篇 |
1982年 | 224篇 |
1981年 | 204篇 |
1980年 | 177篇 |
1979年 | 257篇 |
1978年 | 148篇 |
1977年 | 121篇 |
1976年 | 96篇 |
1975年 | 112篇 |
1974年 | 141篇 |
1973年 | 102篇 |
1972年 | 92篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
One case of the erroneous administration of deslanoside and high level of drug in antemortem plasma and postmortem specimens has been reported owing to the unusual surrounding circumstances. Deslanoside in antemortem plasma was determined by FPIA and the analysis was done by HPLC in the postmortem tissue samples. The analytical results and methods used in the examinations are discussed in the following paper. 相似文献
52.
53.
The effect of various stain carriers on the quality and quantity of DNA extracted from dried bloodstains 总被引:1,自引:0,他引:1
Bloodstains were made with 200 microliters blood on each of 11 different common substrates to examine the effect of the stain carrier on the amount and quality of DNA recoverable. High-molecular-weight DNA was extracted from all samples after 2 days. The yield of DNA from each sample varied considerably, not only between the different stain carriers but also within a given category. With a DNA yield of up to 10 micrograms, paper, glass, nylon, wood, smooth leather and wool gave the best results, followed by blue denim and wallpaper (up to 6 micrograms), cotton fabric and carpeting (up to 4 micrograms) and suede (up to 2 micrograms). For several stain carriers the DNA-containing solution was contaminated by chemical substances, which in the case of the blue denim, suede, and carpet samples inhibited the digestion of the DNA with restriction enzymes and prevented DNA typing. The different textures of the stain carriers tested and (as for varying yields on the same carrier) the differing degree of loss of DNA during extraction and the physiological variation in the number of leukocytes in human blood are discussed as possible reasons for the wide range of variation in the amounts of DNA it was possible to extract. 相似文献
54.
55.
Richard Lewis Robert McNabb Helen Robinson & Victoria Wass 《Journal of law and society》2002,29(3):406-435
This article examines the effect upon damages for personal injury of methods used in the United States of America to calculate loss of future earnings. The work of lawyers is examined from the perspective of labour economists. The damages calculated by using these alternative methods are compared with those actually awarded in over a hundred cases determined by courts in England and Wales. This interdisciplinary and comparative study reveals that the tort system fails to satisfy one of its main objectives in that it does not provide recipients of damages with 'full' compensation. 相似文献
56.
On the basis of the uncertainty management model, we argue here that when people are uncertain about an organization's trustworthiness, they may resolve the question how they should react toward the organization by relying on their perceptions of the organization's procedures. As a consequence, we predicted that the reactions of parents whose child was in a day care center would be strongly influenced by their perceptions of the procedures used by the organization that was responsible for their children's day care when the parents would be uncertain about the organization's trustworthiness. However, when parents would be certain that the organization could be trusted they would be less in need of procedural information, yielding less strong effects of perceived procedure on parents' reactions. The findings of a survey study corroborate this line of reasoning. In the discussion it is argued that these findings suggest that people especially rely on their perceptions of procedures when they are uncertain about important aspects of their lives, such as the trustworthiness of organizations that are responsible for their children's day care. 相似文献
57.
58.
Comparison of a suspected biter's dental arches with the patterned injury of a bite mark is especially difficult when the bite occurs in an anatomic location with a small radius of curvature or with complex or compound curves. The authors present two case reports in which human skin was used as a template for the reproduction of a bite. In one case the victim's skin was used; in the other, the skin of a anatomically similar person was used. The use of inked dental casts, photography, and transparent overlays significantly reduced the errors common to analysis of bite marks in these highly curved areas. 相似文献
59.
60.
M. Dawn Herkenham 《The Journal of law, medicine & ethics》2006,34(2):380-384
Retention of offender DNA samples serves an important quality assurance role for forensic DNA laboratories. Consistent with the principles of confidentiality underlying the establishment of the state and national DNA databases, safeguards are in place to protect the DNA samples from unauthorized use. 相似文献