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   18626篇
  免费   509篇
管理学   2225篇
民族学   103篇
人才学   6篇
人口学   1773篇
丛书文集   108篇
教育普及   2篇
理论方法论   1729篇
现状及发展   1篇
综合类   236篇
社会学   9309篇
统计学   3643篇
  2023年   93篇
  2022年   77篇
  2021年   98篇
  2020年   290篇
  2019年   465篇
  2018年   470篇
  2017年   655篇
  2016年   461篇
  2015年   361篇
  2014年   439篇
  2013年   3159篇
  2012年   660篇
  2011年   584篇
  2010年   462篇
  2009年   441篇
  2008年   507篇
  2007年   508篇
  2006年   465篇
  2005年   418篇
  2004年   415篇
  2003年   390篇
  2002年   395篇
  2001年   475篇
  2000年   388篇
  1999年   386篇
  1998年   316篇
  1997年   283篇
  1996年   295篇
  1995年   276篇
  1994年   263篇
  1993年   252篇
  1992年   292篇
  1991年   291篇
  1990年   259篇
  1989年   263篇
  1988年   249篇
  1987年   229篇
  1986年   220篇
  1985年   248篇
  1984年   237篇
  1983年   234篇
  1982年   182篇
  1981年   156篇
  1980年   175篇
  1979年   176篇
  1978年   143篇
  1977年   141篇
  1976年   124篇
  1975年   117篇
  1974年   97篇
排序方式: 共有10000条查询结果,搜索用时 515 毫秒
321.
An axiom of family planning programming is the importance of culturally-appropriate communicators and motivators. Traditional midwives seem ideal for this task but few studies have been done to verify this assumption by analyzing the midwife's social role as perceived by the community. 325 married women and 81 unmarried girls from a "model village" near Shiraz were interviewed by female undergraduates. 82.5% of the women are of childbearing age; 66% married before 14 years; 33% use contraception, mostly the pill, but most want large families because they expect high child mortality rates. Most of the older women are able to assist in childbirth but none, except the village's one recognized midwife, who is considered to have divine backing, will do so except in an emergency. The midwife's activities cause her to be held in low esteem by the community because 1) she has contact with a woman's sexual parts and this fact is public; 2) she has contact with vaginal excretia which are, in Islam, polluting; and 3) she is paid for her services, which labels her as a woman "without shame". The midwife is, however, widely used since women and their husbands fear the trip to the hospital and treatment by a male doctor much more than a midwife-supervised birth. The midwife in the study village had been there only 2 years and feels that she is not fully trusted. She is not consulted on birth control at all, because women expect the pill to be dispensed by doctors and consider other methods as a matter strictly between husband and wife. The midwife's role seems to complement that of the government health authorities rather than compete. The midwife's low status and circumscribed sphere of activity, the weak respect in which her advice is held and the pattern of having only 1 recognized midwife in a village at a time make the midwife a poor agent for family planning services. Her effectiveness as an agent of social change could be improved by training her in hygienic practices of childbirth and by redefining her role-relationship with the community. Studies should be done to identify the areas where traditional birth attendants are the best family planning communicators and those where that role is best left to others.  相似文献   
322.
323.
324.
Rural household survey data in the Ludhiana district of the Indian Punjab was used to study the nature and role of remittances in rural development. Of the 1646 outmigrants from the area since 1961, the 949 women who migrated for marriage and children under 12 years old were excluded from the study. Nearly all husbands who outmigrated had sent remittances. Parents and grandparents were 2nd and 3rd most likely to remit, but their numbers were small. Education did not correlate with remittance. Distance and time since emigration did not affect remittance. The frequency and the size of remittances are discussed. Remittances to outmigrants were insignificant. The remittances from outmigrants seem to raise the incomes and the levels of living of rural households. The remittances serve the purpose of redistributing income from urban to rural areas. Remittances also widened the gap between rich and poor in the rural areas because the better-off groups were more likely to receive remittances than the poorer groups. Most of the money sent from outmigrants was spent on consumable goods, food and clothing. Only a small proportion was spent on productive investment. This was usually done by farming families who invested in land or farm necessities. It is concluded that remittances from outmigrants can have a positive effect on the rural economies. Investment opportunities for nonagricultural families must be provided.  相似文献   
325.
The author analyzes differences in naturalization baetween "old" groups of migrants coming primarily from Northern and Western Europe and "new" migrants from Southern and Eastern Europe. The primary focus is on naturalization as a measure of assimilation into the United States. Reasons for differences between the two groups are discussed  相似文献   
326.
327.
328.
329.
330.
Summary Analysis of data from various phases of a study of post-partum amenorrhoea in Bangladesh illustrated good aggregate consistency of response on menstrual status, but less individual consistency on duration of post-partum amenorrhoea. Using life table techniques, the median duration of amenorrhoea was calculated as 19.9 months for women with births between February and September 1974. There were substantial seasonal variations in duration, with the median decreasing from 21.5 months for women with February births to 16.9 months for those with September births. By contrast, the median duration of post-partum amenorrhoea varies by only two months for women in the lowest and highest quartiles of weight and weight for height. The seasonal pattern was similar for all weight groups.  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