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   241篇
  免费   10篇
各国政治   10篇
工人农民   15篇
世界政治   35篇
外交国际关系   9篇
法律   111篇
中国政治   1篇
政治理论   70篇
  2023年   3篇
  2020年   3篇
  2019年   6篇
  2018年   7篇
  2017年   7篇
  2016年   10篇
  2014年   7篇
  2013年   26篇
  2012年   4篇
  2011年   4篇
  2010年   4篇
  2009年   4篇
  2008年   9篇
  2007年   8篇
  2006年   8篇
  2005年   10篇
  2004年   9篇
  2003年   6篇
  2002年   9篇
  2001年   4篇
  2000年   2篇
  1999年   5篇
  1998年   6篇
  1997年   3篇
  1996年   2篇
  1995年   2篇
  1994年   6篇
  1993年   5篇
  1992年   3篇
  1991年   7篇
  1990年   3篇
  1989年   3篇
  1988年   2篇
  1987年   4篇
  1986年   2篇
  1985年   1篇
  1984年   8篇
  1983年   3篇
  1982年   3篇
  1981年   4篇
  1980年   2篇
  1979年   4篇
  1978年   2篇
  1977年   2篇
  1976年   4篇
  1975年   2篇
  1974年   6篇
  1972年   1篇
  1969年   2篇
  1968年   3篇
排序方式: 共有251条查询结果,搜索用时 15 毫秒
61.
This study attempted to refine the assessment of the effectance of four-year-old children through observation of their play. Two scales were developed; the first scale defined organization, involvement, and interpersonal responsiveness in play, and the second operationally defined psychosexual content of play. The validity and reliability of both scales and the inter correlations among the four major variables were explored. The results confirmed the validity and reliability of the instruments as measures of the children's effectance and important indicators of a child's capacity as a learner at age four.This research was carried out at the Dr. Martin Luther King Family Center and was supported by the Kenneth F. Montgomery Charitable Foundation in collaboration with the State of Illinois Department of Mental Health. Additional support was provided by the National Institutes of Health, General Research Support Grant No. 1-So 1 FR 05 666-01.Received M.D. from Tulane University School of Medicine in 1957. Presently Associate Professor of Psychiatry at the University of Illinois College of Medicine. Research interests lie in cross-cultural personality development and in psychophysiologic studies of human sexual arousal.Received Ph.D. from the Illinois Institute of Technology in 1967. Presently Assistant Professor of Psychology at the Yale Child Study Center. Research has been mainly in the area of development and interference of effective learning in children.Graduated from the University of Cincinnati College of Medicine in 1954. Presently Associate Professor of Psychiatry at the University of Illinois College of Medicine. Primarily interested in the effects of poverty on personality and social organization.  相似文献   
62.
Rarely have all the branches of federal and state government converged upon a single issue, a single person as they did in the tragic and acrimonious case of Theresa Maria Schiavo. In late 2003, the Florida Legislature passed what become known as "Terri's Law" and in Spring of 2005, Congress and the President of the United States sought to directly intervene in the care of the severely brain damaged woman. During that period, the state and federal court systems, through the highest courts in both venues, ruled on Ms. Schiavo's life, resulting in the removal of an artificial feeding tube and her death during Easter week. The legal and medical issues in this complex, politically and emotionally charged case continue to raise important questions for health attorneys. In this Article, Professor Wolfson, who served as the legislatively mandated, court appointed special guardian ad litem for Theresa Schiavo in late 2003, provides a distinctive first-person overview of the Schiavo case.  相似文献   
63.
64.
This study investigated the possibility of recovering a bomb assembler's DNA from an exploded pipe bomb device. Metal and polyvinyl chloride (PVC) pipes were examined to determine if one surface type would allow better DNA recovery than the other. Ten subjects each handled components of one metal and one PVC pipe bomb. The bombs were exploded, the fragments were collected and swabbed using the double swab technique, and the samples were extracted, quantified, amplified, and genotyped using polymerase chain reaction/short tandem repeat (PCR/STR). Of the 20 bombs handled by the subjects, four bombs gave reportable results that matched the subject's known DNA profiles. An additional eight profiles, also matching the subject's known DNA profiles, were generated but were below the reportable threshold. There was no difference in the success rate of obtaining DNA profiles related to the use of either PVC or metal in the manufacture of the pipe bomb. The variables that appeared to have the greatest influence on the success of generating a DNA profile were the amount of fragmentation and subsequent recovery of the bomb fragments. It is suspected that successful DNA profiling could also be dependent upon the bomb assembler's propensity to slough skin cells on objects they handled.  相似文献   
65.
In this summary of fertility literature the author attempts to differentiate between the effects of behavioral and medical models of family planning programs on the fertility rate. This is done by determining the effects of access to social welfare services by assessment of: the function of children within the family life survey conducted in the Cameroons are also used. It was found that 7 interdependent elements of social service are involved: 1) general health care; 2) social security for sick and aged; 3) employment training and opportunities for adults; 4) literacy and education; 5) communication and transportation systems; 6) housing and infrastructure; 7) child care and welfare. The presence of these elements is shown to accompany low fertility while their absence is expressed in high rates of child bearing. These elements are major variables in both the nomological and public policy senses. 2 additional components are knowledge of and favorable attitudes towards effective means of fertility control plus effective mechanical, chemical, or natural means of limiting fertility. The concept of fertility norm and its impact on the fertility rate is explained as being the result of the collective force which social affiliations exert on people to reproduce in a certain way. The "stopping rule" is that which will fulfill the fertility norm. An example of this is a culture which continues child bearing until a son has been born and then controls reproduction after this has happened. Such factors must be considered for family planning programs to succeed in these cultures. Therefore fertility levels are found to be the product of prevailing norms and technical ability to achieve these norms. Improvement in levels of access to social services can bring about the lowering of these norms.  相似文献   
66.
67.
68.
69.
70.
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