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   68218篇
  免费   2999篇
各国政治   4538篇
工人农民   2861篇
世界政治   6072篇
外交国际关系   3797篇
法律   31485篇
中国共产党   11篇
中国政治   796篇
政治理论   20716篇
综合类   941篇
  2021年   401篇
  2020年   1158篇
  2019年   1508篇
  2018年   1664篇
  2017年   1938篇
  2016年   2165篇
  2015年   1819篇
  2014年   2109篇
  2013年   10513篇
  2012年   1613篇
  2011年   1707篇
  2010年   1822篇
  2009年   2077篇
  2008年   1735篇
  2007年   1709篇
  2006年   1867篇
  2005年   1775篇
  2004年   1653篇
  2003年   1481篇
  2002年   1482篇
  2001年   1541篇
  2000年   1352篇
  1999年   1236篇
  1998年   1114篇
  1997年   978篇
  1996年   964篇
  1995年   921篇
  1994年   922篇
  1993年   941篇
  1992年   944篇
  1991年   968篇
  1990年   916篇
  1989年   954篇
  1988年   948篇
  1987年   984篇
  1986年   951篇
  1985年   1021篇
  1984年   914篇
  1983年   978篇
  1982年   880篇
  1981年   828篇
  1980年   658篇
  1979年   682篇
  1978年   595篇
  1977年   527篇
  1976年   490篇
  1975年   406篇
  1974年   397篇
  1973年   409篇
  1972年   362篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
991.
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   
992.
This article uses a comparative case study approach to relate policy outcomes in terms of family planning to the patterns of political forces observed in the 3 Maghrib states of Algeria, Morocco, and Tunisia. It is suggested that official support for a strong family planning program may be linked to recognition of the problem of low labor absorption and to concrete steps taken to counter the problem. The article discusses different vantage points for approaching the political context of family planning and distinguishes between the use of family planning as an instrument of social policy and as an instrument of economic policy. Ideological reasons for opposition to or support of family planning are then outlined. The colonial experience of the 3 states is differentiated and a chronological account of their family planning programs is provided. The political systems and leadership of the 3 countries are separately discussed in greater detail, after which the influence of elite groups on family planning programs and activities in each country is assessed. Developments in the 3 countries since 1978 are then sketched. The author concludes that the relative importance of policies toward employment and women's status in connection with support for family planning has probably varied over time, with economics playing a greater role in the 1970s. The activities of non-regime political actors were found to be very significant in formulation of population policies in Algeria and Morocco but less so in Tunisia.  相似文献   
993.
994.
995.
The Hon. Editor has received the following letter commenting on Professor Kirk's and Mr. Sloyan's article on the New Covent Garden Market (Vol. 56 Spring 1978). The author is lecturer in applied economics in the Department of Social and Economic Research, University of Glasgow. Mr. Heald's letter is followed by a reply by Professor Kirk on behalf of Mr. Sloyan and himself.  相似文献   
996.
997.
998.
999.
1000.
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