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   131709篇
  免费   1677篇
  国内免费   242篇
教育   91334篇
科学研究   13897篇
各国文化   2057篇
体育   10421篇
综合类   175篇
文化理论   1189篇
信息传播   14555篇
  2021年   1008篇
  2020年   1742篇
  2019年   2701篇
  2018年   3367篇
  2017年   3596篇
  2016年   3634篇
  2015年   2439篇
  2014年   3305篇
  2013年   28138篇
  2012年   2599篇
  2011年   3040篇
  2010年   2508篇
  2009年   2737篇
  2008年   2654篇
  2007年   2353篇
  2006年   2576篇
  2005年   2532篇
  2004年   3201篇
  2003年   2511篇
  2002年   2332篇
  2001年   2300篇
  2000年   1974篇
  1999年   1809篇
  1998年   1540篇
  1997年   1586篇
  1996年   1769篇
  1995年   1538篇
  1994年   1540篇
  1993年   1527篇
  1992年   1674篇
  1991年   1600篇
  1990年   1581篇
  1989年   1528篇
  1988年   1373篇
  1987年   1292篇
  1986年   1314篇
  1985年   1572篇
  1984年   1390篇
  1983年   1403篇
  1982年   1326篇
  1981年   1235篇
  1980年   1229篇
  1979年   1390篇
  1978年   1285篇
  1977年   1167篇
  1976年   1070篇
  1975年   876篇
  1974年   875篇
  1973年   847篇
  1971年   710篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
991.
992.
This study compared follow-up data for two groups of master's degree alumni of a counselor education program, one of which graduated before marked changes in the program occurred and the other thereafter. The questionnaire data represented 83.5 percent of the first group and 89.6 percent of the second. Findings concerning the instructional program, advisement, and library services showed significant improvement in appraisal reactions of alumni in six of 12 cases, some deterioration in one. equivocal results in another, and no change in four. Employment data showed an increase from 42 to 71 percent of alumni in counseling and guidance positions. Professional membership data revealed a significant trend toward identification with national organizations. It was concluded that significant changes in much follow-up data occurred after marked changes in the counselor education program studied and that these changes were generally in the direction of further professionalization of counseling and guidance.  相似文献   
993.
994.
995.
996.
997.
998.
Audio Instruction tapes are described as a form of semi-automated learning whose potential previously has not been realized. Students do not listen to these tapes; they work along with them. These tapes are not lectures. They do not substitute for the teacher. They require the teacher and the class situation for enforcement of learning. This article describes the tapes available for applied statistics and explains how they are used.  相似文献   
999.
1000.
A hurdle-jump escape response was employed to assess the laboratory rat’s aversion or attraction to different types of conspecific odor. Odorant donor subjects received 112 runway acquisition trials on a continuous reward schedule followed by 32 extinction trials, 112 acquisition trials on a 50% schedule of reward and nonreward followed by 32 extinction trials, or 144 “neutral” trials with no reward in the alley. Different groups of test subjects escaped from odor excreted by odorant subjects on (a) nonrewarded acquisition and extinction trials, (b) rewarded trials during continuous reinforcement, (c) rewarded trials during partial reinforcement, or (d) neutral trials; others escaped from a clean box. The principal findings were: (1) significant aversion to “odor of nonreward” appeared after the donor odorants had received 12 exposures to reward; (2) production of odor of nonreward by odorant subjects changed as a function of training experience with reward; (3) after repeated exposure to odor of nonreward, the escape response habituated; (4) greater or different odor excretion in extinction resulted from subjects trained on a continuous reward schedule than on a partial reward schedule. Relationships of the data to frustration theory were discussed, assuming that inferred differences in production of odor reflect differences in frustration reaction.  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