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   11143篇
  免费   609篇
各国政治   448篇
工人农民   411篇
世界政治   853篇
外交国际关系   340篇
法律   7411篇
中国共产党   1篇
中国政治   61篇
政治理论   2170篇
综合类   57篇
  2021年   67篇
  2020年   203篇
  2019年   244篇
  2018年   251篇
  2017年   322篇
  2016年   326篇
  2015年   263篇
  2014年   300篇
  2013年   1100篇
  2012年   255篇
  2011年   332篇
  2010年   301篇
  2009年   308篇
  2008年   308篇
  2007年   288篇
  2006年   299篇
  2005年   269篇
  2004年   271篇
  2003年   253篇
  2002年   249篇
  2001年   470篇
  2000年   435篇
  1999年   300篇
  1998年   187篇
  1997年   156篇
  1996年   128篇
  1995年   125篇
  1994年   150篇
  1993年   138篇
  1992年   201篇
  1991年   228篇
  1990年   210篇
  1989年   221篇
  1988年   213篇
  1987年   194篇
  1986年   237篇
  1985年   215篇
  1984年   168篇
  1983年   178篇
  1982年   121篇
  1981年   131篇
  1980年   96篇
  1979年   140篇
  1978年   78篇
  1977年   79篇
  1976年   75篇
  1974年   75篇
  1973年   70篇
  1972年   69篇
  1970年   48篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
941.
Accidental hypothermia has been described in the forensic literature but reports of occurrence in hospitalized patients are rare. Associated anatomic lesions include acute hemorrhagic pancreatitis and characteristic acute gastric ulcers termed Wischnewski ulcers. We report here two patients with cirrhosis and ascites; one also had hepatocellular carcinoma. Portal vein thrombosis, acute hemorrhagic pancreatitis and Wischnewski ulcers were present in both. The clinical records documented hypothermia that progressed over several days. Temperature nadirs of 31.0 degrees C (87.8 degrees F) and 32.2 degrees C (90.0 degrees F) were recorded in each patient, respectively, one day before death, although each transiently reached temperatures that did not register on standard monitoring devices. This is the first report that chronicles antemortem body temperatures in hypothermic patients with Wischnewski ulcers and pancreatitis at autopsy. Also, the association of these findings with portal vein thrombosis and cirrhosis has not been previously described. We discuss this constellation of findings with regard to possible mechanistic interrelations.  相似文献   
942.
943.
944.
Studies of college freshmen find that men are more sexist in their attitudes than women. Does this hold also for high school students? This paper reports the relationship of (1) sex-role attitudes to selected school and family characteristics and (2) attitudes toward family life to sex-role conceptions for women and men. The study is based on 529 students in grades 9 to 12 attending four high schools. The findings show that males are more sexist than females and Blacks more so than Whites. Women who are bright, from upper class backgrounds, and whose mothers work are more equalitarian in sex-role conceptions. For men, family background is unimportant, but attending an elite public school seems to foster equalitarian sex-role conceptions. Men's sex-role attitudes are harder to explain than women's, and, unlike women, their role attitudes have little connection to their family orientation.  相似文献   
945.
946.
947.
948.
949.
大多数人拥有住房所有权是新加坡公共住房制度的主要特征。从整体上看,公共住房制度对资产构建起到了积极作用。对于物质资产和人力资产构建而言,建立在住房所有权基础上的公共住房制度创造了一种提高劳动生产率和经济增长的机制,这最终使人们可能拥有更大面积的住房。对于社会资产构建而言,公共住房制度有助于家属关系、种族关系和社区关系的改善。住房所有权的资产构建性创造了一种推动社会全面发展的机制。  相似文献   
950.
The essay examines an aspect of family life that has been ignored by many researchers: the role of representations of family and home for men whose work requires prolonged periods of separation and distance. Content analysis of diaries and correspondence (primarily written during the nineteenth and early twentieth centuries) shows that Arctic explorers and whalers engaged in activities reminiscent of those popular at home. We hypothesize that such activities may have helped the men to bear with an environment characterized by danger, discomfort, uncertainty, remoteness, isolation, and lack of privacy. Constructing these microcosms also engaged the crews' creativity and energy in relieving long stretches of unfilled time, and may have prepared them for a smoother re-integration upon their return home. The diaries and letters also expressed the voyagers' longings for their family and their developing of surrogate emotional ties with their ships and shipmates.  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