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   53884篇
  免费   1928篇
  国内免费   15篇
  2020年   457篇
  2019年   583篇
  2018年   2050篇
  2017年   1923篇
  2016年   1637篇
  2015年   629篇
  2014年   767篇
  2013年   3371篇
  2012年   1611篇
  2011年   2347篇
  2010年   1842篇
  2009年   1383篇
  2008年   1961篇
  2007年   2170篇
  2006年   1161篇
  2005年   1140篇
  2004年   1064篇
  2003年   934篇
  2002年   977篇
  2001年   1581篇
  2000年   1495篇
  1999年   1102篇
  1998年   531篇
  1997年   454篇
  1996年   456篇
  1992年   854篇
  1991年   827篇
  1990年   840篇
  1989年   793篇
  1988年   768篇
  1987年   742篇
  1986年   741篇
  1985年   797篇
  1984年   655篇
  1983年   604篇
  1982年   492篇
  1981年   452篇
  1979年   715篇
  1978年   528篇
  1976年   476篇
  1975年   592篇
  1974年   685篇
  1973年   693篇
  1972年   560篇
  1971年   541篇
  1970年   499篇
  1969年   558篇
  1968年   677篇
  1967年   589篇
  1966年   564篇
排序方式: 共有10000条查询结果,搜索用时 272 毫秒
211.
Fixation accuracy was related to perception of laterally presented consonants. Small left-eye fixation inaccuracy influenced perceptual performance of 8 men and 8 women.  相似文献   
212.
The purpose of this study was to investigate differences in scores of 59 mentally retarded adults (mild, moderate, severe, or profound), 133 advantaged, and 130 disadvantaged (low income) children in Grades 1, 2, 3 on the Primary Measures of Music Audiation. Test-retest reliabilities for the Tonal and Rhythm subtests were .81 and .86, respectively, for the retarded group. Analysis of variance indicated that the mildly retarded children performed significantly better than other groups of retarded children on these two tests. 2 x 3 analyses of variance indicated that third graders from both advantaged and disadvantaged groups performed significantly better than the first or second graders on both subtests and that advantaged children performed significantly better than the disadvantaged. However, disadvantaged children made greater gains, especially for third graders, than the advantaged.  相似文献   
213.
Of 1240 first-time consultations in the neuropsychiatric clinic of the Gondar College of Medical Sciences in an eleven-month period during 1985 and 1986, 152 patients came seeking relief from seizures. This paper deals with the origins and background of diagnostic, differential diagnostic, and therapeutic problems, and with problems of social rehabilitation. While in such a tradition-bound society certain hypotheses continue to have an unfavorable effect, there are unmistakable signs of positive change against a background of rapid social change. Conclusions are drawn for the better management of epileptic patients in developing countries.  相似文献   
214.
215.
216.
217.
Stress, locus of control, and achievement of high school seniors   总被引:1,自引:0,他引:1  
  相似文献   
218.
219.
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   
220.
Previous research has suggested that women with a negative emotional orientation toward sexuality (i.e., erotophobia) have difficulty learning and retaining sexually relevant material such as contraceptive information. It has been hypothesized that these women become aroused by this material and that this arousal interferes with their ability to learn it. The importance of this issue led us to conduct the current study. Erotophobic and erotophilic women viewed presentations about contraception while their physiological responses were being monitored. In addition, they were tested on the information contained in the presentation before, immediately after, and again 4-6 weeks after the presentation. The results indicated that the erotophobic women knew less contraceptive information before the presentation and were more aroused by the presentation. This arousal, however, did not interfere with retention of the material. These results are discussed in terms of individual differences in reactions to sexual material and the ability to learn, retain, and use contraceptive information.  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