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   10654篇
  免费   551篇
各国政治   464篇
工人农民   363篇
世界政治   824篇
外交国际关系   308篇
法律   7125篇
中国共产党   1篇
中国政治   57篇
政治理论   2022篇
综合类   41篇
  2021年   61篇
  2020年   194篇
  2019年   235篇
  2018年   239篇
  2017年   296篇
  2016年   305篇
  2015年   252篇
  2014年   269篇
  2013年   1012篇
  2012年   243篇
  2011年   306篇
  2010年   287篇
  2009年   300篇
  2008年   288篇
  2007年   263篇
  2006年   277篇
  2005年   250篇
  2004年   253篇
  2003年   240篇
  2002年   243篇
  2001年   467篇
  2000年   421篇
  1999年   292篇
  1998年   188篇
  1997年   152篇
  1996年   125篇
  1995年   118篇
  1994年   147篇
  1993年   134篇
  1992年   198篇
  1991年   221篇
  1990年   204篇
  1989年   213篇
  1988年   208篇
  1987年   193篇
  1986年   233篇
  1985年   209篇
  1984年   162篇
  1983年   183篇
  1982年   118篇
  1981年   123篇
  1980年   88篇
  1979年   133篇
  1978年   77篇
  1977年   75篇
  1976年   69篇
  1974年   73篇
  1973年   66篇
  1972年   66篇
  1970年   46篇
排序方式: 共有10000条查询结果,搜索用时 11 毫秒
81.
Data from the 1987 National Health and Fertility Survey were used to explore trends and differentials in unwanted fertility in Mexico. Women were classified in three educational categories: illiterate or incomplete primary, complete primary or some secondary, and complete secondary or more. The four urbanization categories were: under 2500; 2500 to 19,999; 20,000 and more; and metropolitan areas. The place of primary socialization was the place of residence until age 12. Two categories of employment of household head were included, agricultural or nonagricultural. The categories for mother's employment considered employment until the union and employment between the time of union and the birth of the first child. The proportion of births that were unwanted was estimated by calculating the total fertility rate for the year before the survey and comparing it to desired family size. The "total desired family size" was 2.4 for the entire sample. In other words, nearly 37% of the total fertility rate was undesired. The greatest differentials in percentages of undesired fertility were found in educational categories. 40.7% of the total fertility rate in the least educated groups vs. 13.6% in the most educated groups was undesired. Differentials in the other categories ranged from 1.9 for a history of employment before the birth of the first child to 8.8 for agricultural or nonagricultural employment of the household head. When effects of education were controlled, the percentage of undesired fertility declined as educational level increased for all rural or urban residence categories, places of socialization, and employment groups except women who worked before the first child was born. Women with more education, urban residence, and with histories of employment had the lowest levels of undesired fertility.  相似文献   
82.
Beck M  Hager M  Rogers P  Miller S  Rosenberg D  Snow K 《Newsweek》1993,121(14):28-33
With Bill Clinton's new reforms only a month away, the health-care system is on the operating table--and the doctors are under the knife. Americans have a love-hate relationship with physicians: they like the care that doctors provide but hold them to blame for the nation's health-care mess. NEWSWEEK looks at how the culture of medicine may change, assesses doctors' fears--and examines the brave new world of HMOs.  相似文献   
83.
Lawyers and judges faced with a contemporary constitutional issue must try to construct a coherent, principled, and persuasive interpretation of the text of particular clauses, the structure of the Constitution as a whole, and our history under the Constitution--an interpretation that both unifies these distinct sources, so far as this is possible, and directs future adjudication. They must seek, that is, constitutional integrity.  相似文献   
84.
85.
86.
87.
88.
89.
Federalism enjoyed political and popular salience during theperiod 1996–1997 as the so-called "Devolution Revolution"began to be implemented and analyzed in the United States. Whilethere were a few examples of important Revolutionary efforts,the federal government continued to hold much of the power andsignificance it has achieved over the past sixty years. Evenin the area of welfare policy, where in 1996 there were historicreforms enacted to end the federal entitlement, the federalgovernment maintained a significant presence that made the ideaof devolution of welfare policy responsibility some what questionable.Nevertheless, states continued to lead in policy innovationin areas ranging from education to health, and the U.S. SupremeCourt continued to question the limits of federal power. Thepast year illustrated, once again, the complexity of our federalsystem and how difficult it is to reform federalism—particularlywhen it involves a shift in power and creates the perceptionof winners and losers.  相似文献   
90.
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