首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   5550篇
  免费   100篇
各国政治   221篇
工人农民   154篇
世界政治   296篇
外交国际关系   156篇
法律   4098篇
中国政治   37篇
政治理论   636篇
综合类   52篇
  2020年   61篇
  2019年   56篇
  2018年   76篇
  2017年   75篇
  2016年   103篇
  2015年   51篇
  2014年   88篇
  2013年   425篇
  2012年   128篇
  2011年   178篇
  2010年   110篇
  2009年   95篇
  2008年   152篇
  2007年   168篇
  2006年   158篇
  2005年   139篇
  2004年   168篇
  2003年   162篇
  2002年   142篇
  2001年   278篇
  2000年   236篇
  1999年   159篇
  1998年   45篇
  1995年   34篇
  1994年   38篇
  1993年   48篇
  1992年   113篇
  1991年   139篇
  1990年   131篇
  1989年   160篇
  1988年   165篇
  1987年   148篇
  1986年   139篇
  1985年   129篇
  1984年   97篇
  1983年   93篇
  1982年   42篇
  1981年   49篇
  1979年   55篇
  1978年   48篇
  1977年   45篇
  1976年   40篇
  1975年   55篇
  1974年   60篇
  1973年   63篇
  1972年   61篇
  1971年   52篇
  1970年   52篇
  1969年   48篇
  1968年   42篇
排序方式: 共有5650条查询结果,搜索用时 15 毫秒
31.
In the forensic science laboratory, the recovery of spermatozoa from vaginal swabs, or vaginal cells from penile swabs, can help determine if sexual intercourse may have taken place. There are several methods used to recover spermatozoa and cells from the swabs before visualisation on a microscope slide and most of these methods use water. Phosphate buffered saline (PBS) is a non-toxic solution used in many biological laboratories. Unlike water, PBS prevents cells rupturing or shrivelling up due to osmosis. This study demonstrates that PBS can be used for the extraction of spermatozoa and cells from swabs and that PBS does not affect subsequent DNA profiling.  相似文献   
32.
33.
Presents forensic medical characteristics of the specific features of stabbed and cut injuries of human skin and jersey. Suggests a complex of signs that will help determine some structural parameters of a knife blade and the conditions of its interaction with the injured site of human body.  相似文献   
34.
We consider the problem of drawing inferences within a legal framework when a person is a suspect for two separate offences. Although we are primarily concerned with scientific evidence the issue inevitably arises as to how that evidence interacts with other, non-scientific evidence. We show that, in this particular context, the evidence can be conveniently classified into three categories that concern, respectively: the first crime only; the second crime only; and evidence that relates to similarities between the two crimes. Two case examples are considered and we consider DNA, fibres and eyewitness evidence. These are viewed from the perspective of a prosecutor who has to decide whether or not to charge a suspect with one or both crimes. Graphical sensivity analyses are presented which have features that are not intuitively obvious.  相似文献   
35.
California is now in its 11th year of mandatory child custody mediation, with a current yearly case volume statewide estimated at 65,494. This article profiles the variations in programs and mediation styles in 56 of the state's 58 Superior Courts. Two research studies provide the basis for the information on program structures, case activity, procedures, agreement formats, recommendations, facilities, security, and fees.  相似文献   
36.
Although physical punishment has been studied for decades, there are gaps in the literature regarding frequently used form, context, and cross cultural differences. A comparison was made using 227 college students in the United States and Japan, who were presented with four scenarios and surveyed regarding attitudes toward physical punishment, perceptions of appropriate discipline methods, and past experience with physical punishment. Japanese and U.S. respondents reported similar personal experience with physical punishment (Japanese 86%, U.S. 91%). However, U.S. respondents reported a higher likelihood of being hit with an object than did Japanese respondents. For U.S. respondents, the bottom and the hand were the top two sites on the body used for physical punishment, whereas the head and the face were the top two places for the Japanese sample. Unlike U.S. respondents, type of child misbehavior was found to have an impact on Japanese respondents’ views on the appropriate discipline method.  相似文献   
37.
In this article a practical case is described when gunshot directions and position of a victim's body at the moment of each shot were determined by natural simulation using an LG-78 laser (made in the form of a gun).  相似文献   
38.
39.
The analysis of naphthenic acid revealed that they may be used for tin detection in the cadaveric material due to their high complex-forming ability. Method of extraction-atomic absorption tin determination in human organs was developed on the basis of naphthenic acid use. Modified method which differs from the common one by higher sensitivity and selectivity is presented.  相似文献   
40.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号