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   9154篇
  免费   310篇
各国政治   622篇
工人农民   363篇
世界政治   712篇
外交国际关系   386篇
法律   5285篇
中国共产党   2篇
中国政治   142篇
政治理论   1862篇
综合类   90篇
  2020年   131篇
  2019年   146篇
  2018年   203篇
  2017年   224篇
  2016年   229篇
  2015年   198篇
  2014年   202篇
  2013年   1114篇
  2012年   235篇
  2011年   320篇
  2010年   226篇
  2009年   245篇
  2008年   254篇
  2007年   229篇
  2006年   227篇
  2005年   197篇
  2004年   225篇
  2003年   241篇
  2002年   168篇
  2001年   357篇
  2000年   329篇
  1999年   291篇
  1998年   145篇
  1997年   103篇
  1996年   112篇
  1995年   99篇
  1994年   106篇
  1993年   102篇
  1992年   162篇
  1991年   158篇
  1990年   148篇
  1989年   139篇
  1988年   159篇
  1987年   157篇
  1986年   161篇
  1985年   147篇
  1984年   145篇
  1983年   154篇
  1982年   93篇
  1981年   67篇
  1980年   82篇
  1979年   98篇
  1978年   78篇
  1977年   66篇
  1976年   68篇
  1975年   58篇
  1974年   49篇
  1972年   53篇
  1971年   54篇
  1969年   55篇
排序方式: 共有9464条查询结果,搜索用时 15 毫秒
101.
Discharge of a shotgun with a shotgun casing in its muzzle as a "dust cover" produced a pattern of injuries suggestive of combined intermediate- and distant-range wounds.  相似文献   
102.
Approximately 15% of victims of instantly lethal central nervous system trauma have an empty or nearly empty heart at autopsy. This article defines and discusses the "empty heart" sign.  相似文献   
103.
104.
105.
Fifty-three clusters of blowfly eggs of the genus Calliphora vicina were observed in the laboratory up to the hatching stage under reproducible and virtually field-like conditions. Rearing the larvae was then continued up to pupation, the larval growth in length being recorded several times a day. As the object was to study the dependence of the larvae increase in length on the temperature conditions in vitro, the substratal humidity and food supply were kept unchanged during the entire study. The temperature ranged from 6.5 degrees C to 35 degrees C, with the temperature for the individual cluster kept constant during the entire developmental process. Data on about 5500 measured larvae were statistically evaluated. The basic result established was that in the case of the blowfly of the genus Calliphora vicina in vivo, all developmental stages relevant to the entomologic determination of the time of death depend on the temperature conditions: (1) the duration of the egg stage increases with decreasing temperature; (2) the speed of larval growth is slower at lower temperatures; (3) the maximal larval length is reached earlier at higher temperatures; (4) the mean value of maximal length decreases with increasing temperature; (5) larvae under all temperature conditions decrease in size after having reached their maximal length, the decrease in length being more rapid at higher temperatures; (6) constant temperatures over 30 degrees C lead to "stunted forms" which do not pupate and die; (7) constant temperatures under approximately 16 degrees C after the peak of growth has been reached inhibit the readiness to pupate, which causes the larvae to fall into a stationary state of rest, which will be interrupted only when the temperature is raised and resumption of the metamorphosis is thus induced. To allow rapid reconstruction of the larval age in general practice, the established growth data were set out in the form of a diagram designated isomegalendiagram, which permits temperature-fluctuation-related entomologic determination of the time of death with a maximum degree of accuracy.  相似文献   
106.
This article analyzes the enforcement practices of the Investment Industry Regulatory Organization of Canada (IIROC) and compares them with its predecessor, the Investment Dealers Association of Canada (IDA). The study collected data from IIROC's tribunal cases decided between June 2008 and December 2019 and compared them with data on the IDA's enforcement of complaints from 1984 to 2008. The findings reveal no statistically significant difference in the fines imposed by the two regulatory bodies. Furthermore, IIROC has refrained from issuing lenient penalties such as retaking examinations/courses or mandating terms and conditions for offenders. The results also indicate no significant impact on the number or distribution of offense types committed in the industry over time. Most notably, the Ontario Securities Commission, the Canadian Securities Regulators, and the new Self-Regulatory Organization of Canada should consider these findings when formulating policies concerning the role of self-regulation in the financial markets.  相似文献   
107.
108.
109.
110.
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