全文获取类型
收费全文 | 32151篇 |
免费 | 1312篇 |
专业分类
各国政治 | 1410篇 |
工人农民 | 1885篇 |
世界政治 | 1875篇 |
外交国际关系 | 1096篇 |
法律 | 20529篇 |
中国共产党 | 9篇 |
中国政治 | 149篇 |
政治理论 | 6352篇 |
综合类 | 158篇 |
出版年
2021年 | 138篇 |
2020年 | 509篇 |
2019年 | 564篇 |
2018年 | 1877篇 |
2017年 | 1822篇 |
2016年 | 1752篇 |
2015年 | 703篇 |
2014年 | 684篇 |
2013年 | 2617篇 |
2012年 | 833篇 |
2011年 | 1530篇 |
2010年 | 1622篇 |
2009年 | 1277篇 |
2008年 | 1384篇 |
2007年 | 1370篇 |
2006年 | 758篇 |
2005年 | 682篇 |
2004年 | 774篇 |
2003年 | 661篇 |
2002年 | 612篇 |
2001年 | 884篇 |
2000年 | 774篇 |
1999年 | 620篇 |
1998年 | 355篇 |
1997年 | 276篇 |
1996年 | 276篇 |
1995年 | 284篇 |
1994年 | 266篇 |
1993年 | 257篇 |
1992年 | 408篇 |
1991年 | 444篇 |
1990年 | 411篇 |
1989年 | 409篇 |
1988年 | 421篇 |
1987年 | 401篇 |
1986年 | 436篇 |
1985年 | 453篇 |
1984年 | 375篇 |
1983年 | 359篇 |
1982年 | 274篇 |
1981年 | 246篇 |
1980年 | 226篇 |
1979年 | 307篇 |
1978年 | 194篇 |
1977年 | 153篇 |
1976年 | 133篇 |
1975年 | 153篇 |
1974年 | 192篇 |
1973年 | 146篇 |
1972年 | 129篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
11.
VG München 《Natur und Recht》2006,28(8):528-530
Keine Zusammenfassung 相似文献
12.
VGH München 《Natur und Recht》2006,28(4):269-269
Keine Zusammenfassung 相似文献
13.
14.
OVG Lüneburg 《Natur und Recht》2006,28(8):524-527
Keine Zusammenfassung 相似文献
15.
16.
This study aimed to expand the scope of previous research by assessing the effectiveness of soot-removal techniques on glass from petrol-bomb debris using methods of 1% and 2% sodium hydroxide (NaOH) solutions, ultrasonic bath and vacuum suction. Of particular interest were the 1% and 2% NaOH solutions applied to the soot-covered surfaces. Petrol bombs containing petrol or a 50:50 mix of petrol and motor oil were exploded and the debris was collected for analysis. Favourable results were found to varying degrees using each of the soot-removal methods with the 1% and 2% NaOH wash solutions, being the most useful. The 2% NaOH solution also proved successful as a soak to loosen and remove heavy contamination of soot and accelerants without damaging the finger mark beneath. This study also found that recovery of finger marks in blood from beneath soot using the 2% NaOH solution was possible. Finger marks were also applied to glass bottles with plastic adhesive labels, and providing the fire damage is not too great marks were also retrievable. Results from this study lead to the conclusion that the NaOH wash solution is ideally suited for soot removal to reveal latent and blood-contaminated marks both within the laboratory and at crime scenes. 相似文献
17.
OVG Lüneburg 《Natur und Recht》2006,28(9):599-600
Keine Zusammenfassung 相似文献
18.
The lungs of 79 children who had died between the ages of 1 week and 2 years old were histologically examined. 59 of these children could be categorized as cases of Sudden Infant Death because of the history and postmortem findings. In the remaining 20 cases a definite cause of death could be established. This is the same collective on which the histological investigations of the lymphatic tissue has been carried out. Morphological changes which are typical for a virus pneumonia were found in a substantially higher frequency in the cases of Sudden Infant Death than in the control cases. The validity of these findings and their possible significance for the cause of death are discussed. 相似文献
19.
Restriction fragment length polymorphism (RFLP) analysis for the purpose of individualization is now being used in casework in the People's Republic of China. This report describes the use of the multilocus minisatellite probe 33.15 to solve three cases, including two homicides and a rape. In the third case, fetal tissue was analyzed to prove that the alleged rapist was, in fact, the father. In each case, analysis of deoxyribonucleic acid (DNA) resulted in a positive match. The probability of chance association of the DNA fingerprint was calculated as 5.6 x 10(-12), which is similar to the figures reported in the literature. 相似文献
20.