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   117篇
  免费   1篇
教育   46篇
科学研究   63篇
体育   7篇
综合类   1篇
信息传播   1篇
  2014年   1篇
  2012年   7篇
  2011年   16篇
  2010年   2篇
  2008年   4篇
  2007年   9篇
  2006年   4篇
  2005年   5篇
  2004年   1篇
  2003年   4篇
  2002年   1篇
  2001年   1篇
  2000年   3篇
  1999年   3篇
  1996年   6篇
  1995年   10篇
  1994年   10篇
  1993年   8篇
  1992年   7篇
  1991年   6篇
  1990年   7篇
  1981年   1篇
  1959年   1篇
  1954年   1篇
排序方式: 共有118条查询结果,搜索用时 0 毫秒
81.
W.French Anderson开创了基因疗法  相似文献   
82.
83.
84.
85.
固态肿瘤内药物传递的障碍   总被引:5,自引:0,他引:5  
Jain.  RK 赵裕卿 《科学中国》1994,(11):25-32,39
  相似文献   
86.
灌丛火鸡     
  相似文献   
87.
88.
89.
90.
OBJECTIVES: It has been proposed that homeless street girls are more likely to be from dysfunctional families and exhibit psychological distress than homeless street boys, reflecting cultural factors that result in differential norms for male and female behavior. The current analysis examined whether male and female street youth in a mid-sized Brazilian city differed in their family circumstances and day-to-day functioning on the street. METHODS: The opportunity sample consisted of 33 male (mean age 14.3, range 10-17 years) and 33 female (mean age 14.6, range 11-18 years) street youth who participated in a sentence completion task and structured interview examining family experiences and ability to meet daily needs on the street. RESULTS: Consistent with the cultural hypothesis, girls described more negative family backgrounds than boys (e.g., they were more likely to have left home because of conflict or abuse, and reported more negative relationships with their parents). However, girls' functioning on the street was similar to, and in some cases more positive than, that of boys (e.g., fewer girls reported police violence and begging to earn money). CONCLUSIONS: The few gender differences that emerged in this study offer little support for the cultural hypothesis. The findings make sense if local factors, such as services available for male and female youth and public response to street youth, are considered. It appears that street youth differ in their experiences depending on local circumstances, highlighting the need for caution in generalizing about the situation of street youth in different countries.  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