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   8814篇
  免费   293篇
各国政治   518篇
工人农民   412篇
世界政治   761篇
外交国际关系   424篇
法律   5214篇
中国政治   60篇
政治理论   1687篇
综合类   31篇
  2023年   55篇
  2022年   52篇
  2021年   89篇
  2020年   157篇
  2019年   222篇
  2018年   307篇
  2017年   307篇
  2016年   308篇
  2015年   205篇
  2014年   280篇
  2013年   1121篇
  2012年   347篇
  2011年   312篇
  2010年   216篇
  2009年   219篇
  2008年   279篇
  2007年   304篇
  2006年   234篇
  2005年   202篇
  2004年   240篇
  2003年   189篇
  2002年   161篇
  2001年   357篇
  2000年   332篇
  1999年   225篇
  1998年   106篇
  1997年   93篇
  1996年   69篇
  1995年   74篇
  1994年   58篇
  1993年   51篇
  1992年   133篇
  1991年   149篇
  1990年   141篇
  1989年   133篇
  1988年   114篇
  1987年   132篇
  1986年   104篇
  1985年   100篇
  1984年   105篇
  1983年   92篇
  1982年   67篇
  1981年   75篇
  1979年   78篇
  1978年   48篇
  1975年   39篇
  1974年   52篇
  1973年   55篇
  1972年   40篇
  1971年   35篇
排序方式: 共有9107条查询结果,搜索用时 31 毫秒
41.
In motorcycle accidents involving two riders, medicolegal identification of the driver is necessary when one or both riders die. It is particularly important in the latter case, because the survivor almost always insists that he or she was not driving. One characteristic injury that distinguishes the driver from the passenger is inguinal contusion-laceration (accompanied internally by pelvic fracture). This injury, caused by collision of the pelvis with the fuel tank, identifies the driver.  相似文献   
42.
43.
44.
45.
Ministerial reshuffles are complex exercises requiring careful handling. A frequent occurrence in British government, their significance is usually seen in political terms. Prime Ministers attach great importance to maximizing the political advantages to be gained from them. This factor is the chief determinant of their logistics, the principal characteristics of which are secrecy in advance and the speed with which ministerial changes are executed. These features - as much as the frequency of ministerial changes per se - may disrupt the policy process and have serious implications for minister-civil servant power relations. Such problems could be alleviated by giving ministers advance notice of changes of post. The institution of a process of ministerial handovers would strengthen the position of incoming ministers by making them less dependent on their officials, upon whom they rely heavily for initial briefing at present.  相似文献   
46.
Misidentification syndromes have been studied from a variety of perspectives, including phenomenological, biological, and nosological approaches. More recently, misidentification syndromes have been studied from a psychiatric-legal perspective, especially with regards to the problem of dangerousness. Capgras syndrome and other syndromes of misidentification can lead to hostile mood and subsequent physical violence. Little attention has so far been devoted to children as the objects of the psychotic person's misidentification delusion(s). We provide a review of cases from the anglophonic literature that have children as the misidentified objects, add three new cases, and then discuss the relationship between misidentification and potential harm to these children.  相似文献   
47.
A case of the sudden death of a 14-month-old girl due to massive hemorrhage in a primitive neuroectodermal tumor (PNET) is presented along with a review of the relevant literature. PNET is a rare, malignant brain neoplasm occurring predominantly in children.  相似文献   
48.
49.
Postmortem changes in sulfide concentrations in body tissues were examined in autopsied rats exposed to hydrogen sulfide concentrations of 550 to 650 ppm, and in nonexposed rats and humans. Analyses were made by gas chromatography, following an extractive alkylation. Sulfide concentrations in the blood, liver, and kidneys of rats increased in both the exposed and nonexposed groups, depending on the lapse of time after death. On the other hand, the lung, brain, and muscle showed little or no change in sulfide concentration with elapse of time after death. The data obtained from human tissues were almost the same as those for rats, except data for blood, in which no or little increase of sulfide was observed.  相似文献   
50.
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