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   10802篇
  免费   296篇
各国政治   405篇
工人农民   389篇
世界政治   723篇
外交国际关系   302篇
法律   6798篇
中国政治   67篇
政治理论   2325篇
综合类   89篇
  2020年   106篇
  2019年   164篇
  2018年   195篇
  2017年   224篇
  2016年   216篇
  2015年   171篇
  2014年   189篇
  2013年   973篇
  2012年   223篇
  2011年   269篇
  2010年   218篇
  2009年   277篇
  2008年   278篇
  2007年   277篇
  2006年   262篇
  2005年   245篇
  2004年   242篇
  2003年   250篇
  2002年   238篇
  2001年   429篇
  2000年   378篇
  1999年   302篇
  1998年   162篇
  1997年   122篇
  1996年   141篇
  1995年   137篇
  1994年   134篇
  1993年   139篇
  1992年   235篇
  1991年   257篇
  1990年   243篇
  1989年   257篇
  1988年   228篇
  1987年   227篇
  1986年   267篇
  1985年   257篇
  1984年   229篇
  1983年   217篇
  1982年   153篇
  1981年   129篇
  1980年   115篇
  1979年   154篇
  1978年   87篇
  1977年   112篇
  1976年   96篇
  1975年   71篇
  1974年   89篇
  1973年   83篇
  1972年   78篇
  1971年   69篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
1. The indications such as the place of finding, the identification of clothes or other personal items, represent only the first step towards the identification of a corpse. 2. An identification based on medical data, other than dental, is often possible, more often than it is believed. 3. The forensic pathologist plays a double role in the case of such an identification: a) in the phase of the inquiry, he must contact the investigators and the families to explain his wishes and the different possibilities of identification. b) he must use the gathered information in the appropriate way. 4. It would be desirable to compose some statistical tables of the various medical elements useful for the identification (mutilations, surgical operations, etc...). We present six cases of identification in our practice.  相似文献   
63.
Considerable research has documented that global perceptions of proceduralv fairness are associated with reductions in relative deprivation (RD). Less research has examined the specific process elements that lead individuals to perceive procedural fairness. In view of this, several researchers have suggested that providing advance notice concerning a negative decision increases perceived justice and thereby lowers levels of RD. Unfortunately, the evidence for this causal relationship is currently limited and is based upon a small number of correlation and role-playing studies. Thus, the present paper reports on two experimental studies that investigate the causal relationship between advance notice and RD. Findings in Study 1 showed that advance notice impacted the cognitive aspects of RD but not the affective or behavioral aspects. However, some methodological limitations were identified. These were corrected and a second experiment was conducted. This time advance notice lowered both the cognitive and affective aspects of RD but still did not impact the behavioral measure. Results are discussed in terms of Tyler's (1987) group value model.  相似文献   
64.
65.
66.
The concentration of thyreoglobulin (tg) was determined for death caused by hanging, strangulation by ligature, and throttling. Cases of sudden death (traumatic aortic rupture, penetrating wounds of the heart) were used for comparison. The mean values in cases of hanging (149.9±202.3 ng/ml), strangulation by ligature (193.1±173.3), manual strangulation (561.6±173.9) are distinguishable from violent acute deaths (23.3±27.6) and living healthy individuals (17.3±16.1). By means of statistical comparisons, significant differences were found between throttling and strangulation by ligature and between throttling and hanging (adjusted P<0.001). In connection with examination of the bodies high tg values can be regarded as a vital reaction in obstructive asphyxia.  相似文献   
67.
A number of recent studies have explored the consequences ofinterracial peer effects on the academic and social performanceof minority students. This article contributes to that discussion,focusing, however, on perceptions rather than behaviors. Theanalysis suggests that exposure to white peers is associatedwith declining perceptions of racial justice among black andLatino high school students. While cautioning against causalinterpretations of this finding, the article suggests that theintegrationist aims of Brown v. Board of Education will notbe satisfied without more thoughtful and vigorous desegregationefforts.  相似文献   
68.
69.
70.
Deoxyribonucleic acid (DNA) typing of ribosomal ribonucleic acid (rRNA) genes was performed with a polymerase chain reaction (PCR) assay for species identification. A variable region of the 28S ribosomal RNA gene was amplified with primers complementary to flanking sequences phylogenetically well conserved. The products of twelve animal DNAs (human, Japanese monkey, dog, cattle, pig, cat, rabbit, mouse, rat, chicken, frog, and fish) were separated by polyacrylamide gel electrophoresis, each revealing a few bands ranging from 150 to 100 base pairs. The band patterns obtained from each DNA sample differed in number and size, which indicates the applicability of the method to species identification. Samples containing either as little as 1 pg of DNA or degraded DNA of 0.2 to 0.5 kb in length were able to give detectable bands. Postmortem human tissue DNAs were tested as an example. They showed a pattern identical to the human control one, which was distinct from those of the other animals examined.  相似文献   
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