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   10805篇
  免费   308篇
各国政治   414篇
工人农民   392篇
世界政治   735篇
外交国际关系   291篇
法律   6825篇
中国政治   73篇
政治理论   2290篇
综合类   93篇
  2020年   109篇
  2019年   160篇
  2018年   197篇
  2017年   230篇
  2016年   222篇
  2015年   164篇
  2014年   194篇
  2013年   989篇
  2012年   220篇
  2011年   271篇
  2010年   220篇
  2009年   273篇
  2008年   276篇
  2007年   277篇
  2006年   264篇
  2005年   252篇
  2004年   244篇
  2003年   255篇
  2002年   244篇
  2001年   426篇
  2000年   369篇
  1999年   296篇
  1998年   162篇
  1997年   124篇
  1996年   137篇
  1995年   134篇
  1994年   136篇
  1993年   137篇
  1992年   233篇
  1991年   254篇
  1990年   243篇
  1989年   252篇
  1988年   226篇
  1987年   224篇
  1986年   262篇
  1985年   259篇
  1984年   233篇
  1983年   216篇
  1982年   152篇
  1981年   128篇
  1980年   114篇
  1979年   152篇
  1978年   87篇
  1977年   113篇
  1976年   96篇
  1975年   71篇
  1974年   91篇
  1973年   87篇
  1972年   79篇
  1971年   69篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
251.
252.
A number of social and psychological factors present in most adolescent parents place them at high risk for abusive behavior toward their children. However, current child abuse potential measures do not include adolescent samples as part of the psychometric data base. Consequently, the purpose of this study was twofold: (1) to investigate whether a Black adolescent sample would perform differently than an adult nonabusing sample on the Child Abuse Potential Inventory (CAP), and (2) to examine the relationship between history of abuse or witnessing violence to scores on the CAP. Results revealed that Black adolescents scored significantly higher than the adult normative sample on the CAP; consequently, cutoff scores need to be empirically established for adolescents. Additional analyses indicated that a history of abuse, as well as a history of witnessing violence, are associated with a high potential for abuse.  相似文献   
253.
Ames K  Wilson L  Sawhill R  Glick D  King P 《Newsweek》1991,118(9):40-41
When dying is all that awaits them, more and more people are choosing certain death now rather than uncertain life on medical support systems. But the decision seldom comes easy, as a Newsweek reporter discovers during three weeks with the doctors, nurses, patients and families in an intensive-care ward. A best-selling guide to suicide fires debate over when it is right to let life go--and who should make that choice when the patient no longer can.  相似文献   
254.
The author assesses the reliability of the eleventh general population and housing census conducted in Mexico in March 1990. An undercount of as many as two million persons is estimated. (SUMMARY IN ENG)  相似文献   
255.
256.
257.
258.
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   
259.
260.
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