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   26621篇
  免费   1150篇
  国内免费   17篇
  2021年   236篇
  2020年   394篇
  2019年   377篇
  2018年   668篇
  2017年   591篇
  2016年   622篇
  2015年   388篇
  2014年   516篇
  2013年   2200篇
  2012年   1000篇
  2011年   1061篇
  2010年   598篇
  2009年   589篇
  2008年   879篇
  2007年   824篇
  2006年   755篇
  2005年   680篇
  2004年   571篇
  2003年   567篇
  2002年   529篇
  2001年   852篇
  2000年   868篇
  1999年   621篇
  1998年   259篇
  1997年   230篇
  1996年   212篇
  1992年   509篇
  1991年   438篇
  1990年   507篇
  1989年   428篇
  1988年   406篇
  1987年   380篇
  1986年   392篇
  1985年   451篇
  1984年   352篇
  1983年   297篇
  1982年   226篇
  1979年   334篇
  1978年   265篇
  1976年   210篇
  1975年   304篇
  1974年   351篇
  1973年   356篇
  1972年   280篇
  1971年   251篇
  1970年   216篇
  1969年   234篇
  1968年   298篇
  1967年   257篇
  1966年   281篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
121.
Light-eyed individuals generally perform better at self-paced activities while dark-eyed individuals perform better at reactive activities. Using multiple regression it was found that dark-eyed students hit a target with a frisbee more times than did light-eyed students.  相似文献   
122.
123.
The youngest subject (age 5) participating in the 1986 evaluation studies published in this Journal returned 25 mo. after finishing REHABIT training. This boy's test scores showed a significant decline in verbal ability. It was concluded that follow-up studies of REHABIT clients are necessary and that such clients should be cautioned that regression may occur.  相似文献   
124.
The Rosenberg Self-esteem Scale was administered to 550 14- and 16-yr.-old (+/- 6 mo.) girls. Self-esteem scores were categorized by weight and weight by height. Scores on the Quetelet Index for obesity were correlated with self-esteem scores. Mean self-esteem of the low- and middle-weight by height group was significantly higher than the mean of the high-weight by height group. In analyzing weight alone, the self-esteem of the middle-weight group was significantly higher than the self-esteem of the high-weight group. The correlation of the obesity index and self-esteem indicated that as weight increased self-esteem decreased.  相似文献   
125.
126.
"Abnormal fusion" of stereopsis and binocular rivalry   总被引:1,自引:0,他引:1  
  相似文献   
127.
128.
Practice in front of a mirror is a common procedure for activities such as dance, gymnastics, and other sports. The purpose of this study was to examine the effect that performing with concurrent visual feedback from a mirror had on the acquisition of the power clean movement. 18 college-age males who had no prior experience with the power clean movement served as subjects who were assigned to one of two groups. One group had use of a mirror during the practice trials and the other practiced without the mirror. All subjects viewed an instructional videotape and had practice trials. All subjects were evaluated for proper technique on a pretest, a posttest without the mirror, and a posttest with the mirror. Analysis showed a significant difference between pre- and posttest performances for both groups and a significant difference between groups on the posttest performances with the mirror. Evidently the videotaped instruction was sufficient to allow both groups to improve in performance of the power clean. Differences in posttest performances with the mirror reflected the type of feedback (with or without the mirror) available during training.  相似文献   
129.
130.
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