全文获取类型
收费全文 | 2821篇 |
免费 | 128篇 |
国内免费 | 3篇 |
专业分类
2952篇 |
出版年
2022年 | 23篇 |
2020年 | 40篇 |
2019年 | 49篇 |
2018年 | 82篇 |
2017年 | 58篇 |
2016年 | 78篇 |
2015年 | 47篇 |
2014年 | 50篇 |
2013年 | 276篇 |
2012年 | 99篇 |
2011年 | 117篇 |
2010年 | 76篇 |
2009年 | 75篇 |
2008年 | 110篇 |
2007年 | 108篇 |
2006年 | 92篇 |
2005年 | 89篇 |
2004年 | 83篇 |
2003年 | 73篇 |
2002年 | 71篇 |
2001年 | 63篇 |
2000年 | 63篇 |
1999年 | 44篇 |
1998年 | 49篇 |
1997年 | 28篇 |
1996年 | 33篇 |
1995年 | 27篇 |
1994年 | 28篇 |
1992年 | 36篇 |
1991年 | 58篇 |
1990年 | 41篇 |
1989年 | 35篇 |
1988年 | 36篇 |
1987年 | 38篇 |
1986年 | 35篇 |
1985年 | 31篇 |
1983年 | 31篇 |
1982年 | 34篇 |
1981年 | 39篇 |
1979年 | 31篇 |
1978年 | 30篇 |
1977年 | 27篇 |
1976年 | 33篇 |
1975年 | 36篇 |
1974年 | 28篇 |
1973年 | 28篇 |
1972年 | 23篇 |
1970年 | 24篇 |
1968年 | 25篇 |
1967年 | 28篇 |
排序方式: 共有2952条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
5.
A high proportion of positive responses was obtained from students who participated in three different types of pre-college orientation programs. Small group approaches consistently elicited more favorable responses than assemblies or large groups. Greater faculty involvement resulted in participants' noting an increased academic emphasis. Participants believed they had benefited in some way from programs which varied considerably as to length, activities, organization, and purposes. 相似文献
6.
7.
8.
9.
Effects of visual aids on acquisition of selected tennis skills 总被引:1,自引:0,他引:1
The study compared the effects of supplemental visual aids on the acquisition of selected tennis skills. The forehand and backhand drive placement tests of the Hewitt Tennis Achievement Test were used to pretest, midtest, and posttest 55 subjects who were assigned to one of three treatments: control (instructor's verbal feedback only), videotaped replay viewing (with instructor's feedback), and loop-film viewing (modeling, with instructor's feedback). Each received 1200 min. of instruction. There were no statistically significant differences among groups; however, empirical evidence suggested that the use of videotaped replay and loop-film technique has merit and might be given consideration for use in instructional settings. 相似文献
10.
Study of adolescent violence has been impeded by failure to distinguish among the circumstances in which youth engage in violent behavior. The present study investigated MMPI profiles of 36 adolescent murderers and a control group of 18 adolescents charged with larceny. Homicide cases were subgrouped into those who committed homicide secondary to another crime (e.g., robbery or rape) and those who acted in the context of interpersonal conflict with the victim. While there were no significant differences between homicide and larceny groups, crime and conflict subgroups were significantly different on scales F, Hs, Hy, and Sc. 相似文献