全文获取类型
收费全文 | 13328篇 |
免费 | 617篇 |
专业分类
各国政治 | 505篇 |
工人农民 | 443篇 |
世界政治 | 942篇 |
外交国际关系 | 389篇 |
法律 | 9225篇 |
中国共产党 | 1篇 |
中国政治 | 69篇 |
政治理论 | 2295篇 |
综合类 | 76篇 |
出版年
2020年 | 220篇 |
2019年 | 262篇 |
2018年 | 274篇 |
2017年 | 325篇 |
2016年 | 350篇 |
2015年 | 268篇 |
2014年 | 316篇 |
2013年 | 1208篇 |
2012年 | 304篇 |
2011年 | 403篇 |
2010年 | 345篇 |
2009年 | 350篇 |
2008年 | 373篇 |
2007年 | 363篇 |
2006年 | 359篇 |
2005年 | 317篇 |
2004年 | 354篇 |
2003年 | 324篇 |
2002年 | 328篇 |
2001年 | 577篇 |
2000年 | 525篇 |
1999年 | 377篇 |
1998年 | 201篇 |
1997年 | 162篇 |
1996年 | 136篇 |
1995年 | 134篇 |
1994年 | 157篇 |
1993年 | 158篇 |
1992年 | 244篇 |
1991年 | 289篇 |
1990年 | 275篇 |
1989年 | 282篇 |
1988年 | 285篇 |
1987年 | 262篇 |
1986年 | 293篇 |
1985年 | 270篇 |
1984年 | 213篇 |
1983年 | 221篇 |
1982年 | 134篇 |
1981年 | 139篇 |
1980年 | 97篇 |
1979年 | 160篇 |
1978年 | 103篇 |
1977年 | 95篇 |
1976年 | 93篇 |
1974年 | 106篇 |
1973年 | 96篇 |
1972年 | 98篇 |
1971年 | 76篇 |
1970年 | 79篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
971.
Nineteen Y-chromosomal short tandem repeats (STRs), DYS19, DYS389-I, DYS389-II, DYS390, DYS391, DYS392, DYS393, DYS385, DYS388, DYS434, DYS435, DYS436, DYS437, DYS438, DYS439, DYS460, DYS461 and DYS462 were typed in Inuit (n=70) and Danish (n=62) population samples. 相似文献
972.
Gunshot wounds in suicide cases are self-inflicted wounds. Self-inflicted wounds in suicide cases are usually caused by contact firing and are of great forensic significance. Evaluation of contact wound may be associated with difficulties if the bore gets obstruction prior to firing. This paper investigates the phenomenon and interprets the results of test firing conducted on 20% gelatine block at 10 degrees C, using .38 Special revolver with obstruction of a bullet in the bore. Test firings were conducted in three different muzzle-target contact conditions keeping the muzzle pressed against the gel block in each case. The physical evidence and the wound ballistic parameter namely bullet track, remaining velocity of the bullets and volume of permanent cavity have been studied. When compared with the results of contact firing conducted with the same firearm without having any bore obstruction under similar conditions, it has been found that the physical evidence and the wound ballistic parameters would be helpful for interpretation of such unusual incidents for forensic inference. 相似文献
973.
Alunni-Perret V Kintz P Ludes B Ohayon P Quatrehomme G 《Forensic science international》2003,134(1):36-39
A 30-year-old male died in Thailand after a scuffle. The corpse was embalmed and repatriated to France where an autopsy was performed. As usual in cases of embalmment, fluids such as blood and urine were unavailable and the toxicological analyses was performed on the bile and the liver. An overdose of heroin was determined as the cause of death. A review of the literature indicates that several drugs can be detected in fluids and tissues that contain formaldehyde. This case demonstrates that in embalmed corpses, toxicological assessment is still possible, e.g. after heroin fatalities. 相似文献
974.
We provide a short overview on some current issues in the fields of forensic genetics and ancient DNA (aDNA) analysis. We discuss about the existence of the possible points of contact between the two disciplines, in terms of open problems and the inherent approach to their solution. We mainly focus on the problem of results authentication, its theoretical and technical aspects. 相似文献
975.
976.
977.
978.
979.
980.