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   6350篇
  免费   82篇
  国内免费   5篇
教育   4260篇
科学研究   764篇
各国文化   47篇
体育   587篇
文化理论   28篇
信息传播   751篇
  2022年   39篇
  2021年   64篇
  2020年   102篇
  2019年   155篇
  2018年   189篇
  2017年   196篇
  2016年   184篇
  2015年   114篇
  2014年   154篇
  2013年   1085篇
  2012年   147篇
  2011年   148篇
  2010年   131篇
  2009年   122篇
  2008年   148篇
  2007年   145篇
  2006年   109篇
  2005年   101篇
  2004年   88篇
  2003年   84篇
  2002年   91篇
  2001年   117篇
  2000年   139篇
  1999年   126篇
  1998年   57篇
  1997年   48篇
  1996年   64篇
  1995年   58篇
  1994年   60篇
  1993年   51篇
  1992年   109篇
  1991年   94篇
  1990年   84篇
  1989年   116篇
  1988年   77篇
  1987年   74篇
  1986年   78篇
  1985年   96篇
  1984年   71篇
  1983年   72篇
  1982年   76篇
  1981年   58篇
  1980年   65篇
  1979年   73篇
  1978年   74篇
  1977年   56篇
  1976年   60篇
  1974年   47篇
  1973年   43篇
  1969年   41篇
排序方式: 共有6437条查询结果,搜索用时 15 毫秒
981.
982.
This paper outlines some of the findings and approaches of the Victorian Review. It assesses a stylized "orthodox model" of child welfare law and practice, a model which remains in many Australian jurisdictions and which has its popularity in Britain, Canada, and the United States. It concludes that serious consideration should be given to rebuilding and strengthening these arrangements. This entails emphasis on utilizing laws to serve an educative function and facilitating access by children and families to preventive and support services. It argues that a broad concept of neglect should be adopted and that the "welfare orientation" of the Children's Court requires reconsideration, because the capacity of courts to resolve entrenched structural problems of society has been overrated. Welfare practice, and specifically a community approach to welfare, should shape the primary response to protection of children; judicial involvement should be a last resort.  相似文献   
983.
In two experiments, rats solved two concurrent discrimination problems in which one stimulus (i.e., a facilitator) signaled the reinforcement of another stimulus (i.e., a target). Then a transfer test assessed the capacity of facilitators trained in one problem to promote responding to targets trained in the other. Experiment 1 found that a facilitator promoted as much responding to such a transfer target as to the target with which it was originally trained. Transfer was not obtained with a pseudofacilitator that was uninformative, in training, about the reinforcement of its target. Experiment 2 manipulated the stimulus modality of the targets and facilitators. Its results indicated that transfer performance was not due to generalization between training and transfer targets or facilitators. These results parallel those from comparable autoshaping paradigms with pigeons, and they agree with the view that facilitators promote responding by lowering the threshold for activation of the US representation.  相似文献   
984.
Accurate assessment of physical findings for child sexual abuse is medically and legally important. This study evaluated (1) interobserver reliability of clinicians rating colposcopic photographs, and (2) correlates of reliable interpretations. Seventy physicians and two nurse practitioners, divided by professional levels, assessed colposcopic photographs and completed a questionnaire. Ratings by a professional with extensive experience in this field were used as an accuracy standard. Leaders in the field of child sexual abuse assessment made significantly more "accurate" assessments than pediatricians, pediatric and family practice residents, and intern physicians. Leaders made fewer "inaccurate" interpretations than interns. Predictors of agreement with standard assessments, although weak, were knowledge of female perineal anatomy and professional level. Total number of sexual abuse examinations conducted and knowledge of sexually transmitted diseases as acquired by children were not significant predictors of accurate assessment. The findings are interpreted as to their potential relevance to actual sexual abuse evaluations of children.  相似文献   
985.
The researchers designed the study to achieve two goals: (1) determine the affect of peer collaboration on high school biology students' acquisition of concepts related to photosynthesis and (2) examine interactions in a collaborative peer group situation to determine how these interactions relate to the developpment of concepts associated with photosynthesis. Using quantitative and qualitative data analysis techniques, the researchers concluded that students working in peer collaborative groups developed more scientifically correct conceptions of photosynthesis than did students working alone. However, not all group-generated views were internalized by group members when assessed individually. Based on qualitative data, a functional relationship exists between prior knowledge and concept development. Two types of peer interaction, consonant and dissonant, were identified as enhancing concept development. When peer group roles are not assigned, roles fluctuate depending on group members' expertise or perceived expertise displaying a bidirectional zone of proximal development. This zone allows for enhanced concept development. Based on the above conclusions, the researchers recommend that (1) peer collaboration be used to help students overcome scientific misconceptions; (2) peer collaborative tasks be designed to engage students in consonant and dissonant interactions; and (3) cognitive group roles, as opposed to traditionl managerial cooperative group roles, be used.  相似文献   
986.
Peking duck embryos respond selectively to the maternal call of their species on the day before hatching, given normal embryonic auditory experience (the sounds emanating from their siblings and themselves which begin late on Day 24 of development). Groups of Peking embryos were subjected to recordings of either the mallard or the Burmese red jungle fowl maternal call beginning on Day 21 of incubation. Responses to these calls were tested on the day before hatching to determine the effects of the prenatal auditory experience. The responses of those birds exposed to the mallard maternal call were neither attenuated nor enhanced (as compared to the controls) when presented that call; those subjects which were exposed to the jungle fowl maternal call later failed to respond to that call or the mallard maternal call.  相似文献   
987.
This investigation was conducted to test the effectiveness of strategy teaching and sequencing practice problems in teaching students with learning disabilities to identify the correct algorithm for solving addition and subtraction word problems. Sixty-two students were assigned to one of three experimental groups: strategy plus sequence, strategy only, and sequence only. The results indicated that students in the strategy-plus-sequence group, as well as those in the strategy-only group, scored significantly higher than did students in the sequence-only group. Findings indicated that strategy teaching was the more effective of the two instructional components. Implications are discussed in terms of instructional design for students with learning disabilities.  相似文献   
988.
This study highlights the explanatory principle of cognitive consistency as a foundation for political entertainment research. More specifically, appreciation for pro- versus counter-attitudinal political humor is analyzed via one statewide (N = 304) and two national surveys (N = 1008, N = 786, respectively). Analyses reveal a preference for pro-attitudinal over counter-attitudinal humor. In addition, an assessment of pro- versus counter-attitudinal political humor appreciation serving as potential mediators of one another relative to political party identification is offered. Pro-attitudinal political humor appreciation serves as the stronger mediator, but a full range of mediation-based processes are evident. Implications and potential future lines of research are detailed.  相似文献   
989.
This study demonstrates a method for obtaining data on developmental changes in adolescents' interest in human sexuality. A content analysis was done on a sample of 874 student-generated questions. Question boxes were placed in classrooms so students could anonymously submit questions. In deference to perceived community pressure, questions on abortion, homosexuality, and masturbation were not allowed. Students who wrote the questions are 7th, 8th, and 10th graders enrolled in 13 different public schools. The schools are located in several small communities and on an American Indian reservation in a rural area of northern California. All children who participated did so voluntarily and with parental permission. Of the total 874 questions. 7th and 8th graders provided 593, while sophomores accounted for 233. Gender information was available only for 7th and 8th graders. Boys asked 173 questions while girls asked 241. The data are broken down by gender and by grade (7th and 8th vs. 10th). Findings reveal that younger students show more interest in the meaning of slang terms, their reproductive physiology, and intercourse. Older students show greater interest in contraception and health risks. Males are interested in slang and intercourse while females are more concerned with health risks and communication. One unexpected finding indicates that among younger children, boys and girls are equally interested in birth control and pregnancy; in the lower grades then, may be the prime time to use sex education programs to strengthen the sense of dual responsibility for knowledge about contraception and pregnancy. Also, the relative absence of questions on disallowed issues (2.5%) makes it apparent that sex educators can effectively suppress inquiry into topics that are of great interest to youngsters; only about 1/3 of the students indicated that their parents had discussed these disllowed issues, yet 48% of the students expressed interest in knowing more about abortion.  相似文献   
990.
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