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   20687篇
  免费   466篇
各国政治   1028篇
工人农民   1441篇
世界政治   1288篇
外交国际关系   856篇
法律   11267篇
中国共产党   2篇
中国政治   158篇
政治理论   4986篇
综合类   127篇
  2020年   164篇
  2019年   192篇
  2018年   1484篇
  2017年   1467篇
  2016年   1315篇
  2015年   328篇
  2014年   284篇
  2013年   1700篇
  2012年   515篇
  2011年   1274篇
  2010年   1280篇
  2009年   900篇
  2008年   1050篇
  2007年   990篇
  2006年   347篇
  2005年   369篇
  2004年   484篇
  2003年   473篇
  2002年   298篇
  2001年   423篇
  2000年   418篇
  1999年   360篇
  1998年   246篇
  1997年   185篇
  1996年   169篇
  1995年   194篇
  1994年   192篇
  1993年   166篇
  1992年   228篇
  1991年   208篇
  1990年   197篇
  1989年   200篇
  1988年   216篇
  1987年   227篇
  1986年   218篇
  1985年   217篇
  1984年   207篇
  1983年   205篇
  1982年   148篇
  1981年   120篇
  1980年   112篇
  1979年   144篇
  1978年   122篇
  1977年   107篇
  1976年   93篇
  1975年   78篇
  1974年   71篇
  1973年   72篇
  1972年   67篇
  1969年   71篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
301.
In Summit Health Ltd. v. Pinhas, the United States Supreme Court by a narrow majority found that the exclusion of an ophthalmologist from a hospital in Los Angeles had a sufficient effect on interstate commerce to establish federal jurisdiction under the Sherman Act. In resolving a split among the federal circuit courts of appeal, the Court applied the broad jurisdictional test from McLain v. Real Estate Board of New Orleans, Inc. to peer review proceedings. Despite many ambiguities in the majority opinion by Justice Stevens and a scathing dissent by Justice Scalia, the effect of Pinhas will be to increase the suits in federal court on antitrust grounds brought by aggrieved medical staff members and applicants denied appointments or privileges, and to decrease, if not eliminate, the likelihood of preliminary dismissal on jurisdictional grounds. This, in turn, should serve to emphasize the importance of complying with the Health Care Quality Improvement Act in order to obtain immunity from damages under federal antitrust and state laws.  相似文献   
302.
303.
304.
305.
306.
Child mortality was analyzed in relation to 3 dimensions of reproductive behavior: birth intervals, additional children desired, and contraceptive use. Study data were drawn from a 1978 survey conducted in 2 predominantly rural governorates, Beheira and Kafr El-Sheikh, in lower Egypt. Within each governorate, 2 districts were selected on the basis of their distance from the capital of the governorate, agricultural output by major crops, percent of the population urban, infant mortality rate, and crude birthrate. Within each of the 4 districts, villages were randomly drawn from 3 strata: villages lacking any governmental services; villages with limited services (health center or primary school); and villages served by a combined unit center providing integrated services. A random sample of household heads was selected from household registration records of the provision office of each district. 1200 interviews were obtained from 685 households. Restriction of the sample to women with 1 or more live births, and the elimination of 13 cases with incomplete or inaccurate information, yielded 1010 cases for analysis. The basic measure of actual fertility was birth intervals. For the total sample and within each age category, cumulative fertility is higher the greater the number of child deaths. The data demonstrate a strong relationship between child mortality experience and cumulative fertility. The problem lies in interpreting such results. With some exceptions, birth intervals increased as expected with increasing parity. Women without child death experience displayed longer birth intervals than women who had not lost a child. With the single exception of the 7th parity women, all differences were statistically significant. The data fail to eliminate potential biological influences on subsequent fertility. With biological influences adequately controlled, no behavioral differences remained. Women who experienced child mortality desired greater numbers of additional children than women without child death experience. 19% of respondents were ever users of contraception, with women of low parity the least likely ever to have used contraception.  相似文献   
307.
308.
309.
310.
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