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   16448篇
  免费   857篇
各国政治   724篇
工人农民   561篇
世界政治   1239篇
外交国际关系   520篇
法律   10954篇
中国共产党   1篇
中国政治   84篇
政治理论   3148篇
综合类   74篇
  2021年   92篇
  2020年   286篇
  2019年   338篇
  2018年   365篇
  2017年   443篇
  2016年   446篇
  2015年   386篇
  2014年   388篇
  2013年   1625篇
  2012年   365篇
  2011年   444篇
  2010年   429篇
  2009年   450篇
  2008年   428篇
  2007年   388篇
  2006年   409篇
  2005年   382篇
  2004年   407篇
  2003年   365篇
  2002年   356篇
  2001年   718篇
  2000年   625篇
  1999年   481篇
  1998年   271篇
  1997年   208篇
  1996年   189篇
  1995年   192篇
  1994年   225篇
  1993年   212篇
  1992年   324篇
  1991年   348篇
  1990年   325篇
  1989年   338篇
  1988年   308篇
  1987年   313篇
  1986年   338篇
  1985年   324篇
  1984年   254篇
  1983年   270篇
  1982年   186篇
  1981年   192篇
  1980年   134篇
  1979年   221篇
  1978年   139篇
  1977年   128篇
  1976年   114篇
  1975年   84篇
  1974年   124篇
  1973年   119篇
  1972年   103篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
201.
202.
203.
204.
205.
206.
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   
207.
Public preferences about the availability of abortion under various circumstances have remained fairly stable over time. Yet a standard CBS/New York Times abortion question indicates that a significant shift in opinion occurred during the 1980s, whereby the public became increasingly supportive of legalized abortion as it is now. These very different patterns of public opinion about abortion suggest that the public perceived a shift in the abortion status quo, toward more restricted access, over time, and became more supportive of current abortion policy.A model of support for legalized abortion as it is now is developed that incorporates the influences of court activities and interest-group behavior. The analysis indicates that the public reacted directly to the activities of the courts, becoming more supportive of current abortion policy in response to media coverage of court cases that challenged the abortion status quo and Supreme Court nominations and confirmations. Although absolute preferences remained largely unchanged, it appears the public perceived an increasing threat to the status quo and became correspondingly less enamored with further restrictions on the availability of abortion.  相似文献   
208.
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   
209.
Clift E  Cohn B 《Newsweek》1993,122(19):40-41
  相似文献   
210.
The author relates three cases of conflict which he has observed in Cairo and recognizes patterns that cut across each of these stories. The stories shed light on how people in Egypt approach and deal with conflict; in addition, they may help readers understand conflict in their home culture as well as be instructive on how to listen to conflict in different cultures. Six general themes in the way Egyptians approach or handle conflict are identified, and each of these themes is analyzed.  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