全文获取类型
收费全文 | 15995篇 |
免费 | 228篇 |
国内免费 | 119篇 |
专业分类
教育 | 10923篇 |
科学研究 | 2076篇 |
各国文化 | 121篇 |
体育 | 1450篇 |
综合类 | 13篇 |
文化理论 | 132篇 |
信息传播 | 1627篇 |
出版年
2021年 | 120篇 |
2020年 | 224篇 |
2019年 | 339篇 |
2018年 | 461篇 |
2017年 | 430篇 |
2016年 | 431篇 |
2015年 | 268篇 |
2014年 | 351篇 |
2013年 | 2813篇 |
2012年 | 321篇 |
2011年 | 362篇 |
2010年 | 268篇 |
2009年 | 259篇 |
2008年 | 280篇 |
2007年 | 306篇 |
2006年 | 298篇 |
2005年 | 287篇 |
2004年 | 277篇 |
2003年 | 273篇 |
2002年 | 258篇 |
2001年 | 270篇 |
2000年 | 285篇 |
1999年 | 294篇 |
1998年 | 153篇 |
1997年 | 162篇 |
1996年 | 195篇 |
1995年 | 180篇 |
1994年 | 142篇 |
1993年 | 160篇 |
1992年 | 229篇 |
1991年 | 227篇 |
1990年 | 230篇 |
1989年 | 248篇 |
1988年 | 194篇 |
1987年 | 220篇 |
1986年 | 205篇 |
1985年 | 228篇 |
1984年 | 204篇 |
1983年 | 202篇 |
1982年 | 160篇 |
1981年 | 148篇 |
1980年 | 141篇 |
1979年 | 235篇 |
1978年 | 173篇 |
1977年 | 169篇 |
1976年 | 131篇 |
1975年 | 128篇 |
1974年 | 142篇 |
1973年 | 123篇 |
1971年 | 116篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
992.
993.
994.
995.
996.
997.
998.
This article presents findings of an instrumental case study that examined the perceptions held by African-American parents on the efficacy of schools in meeting the needs of African-American learners in a North Carolina community. A theme of distrust emerged and evidenced the need for teachers, administrators, and teacher educators to reconsider approaches used with African-American parents, particularly where building culturally reciprocal home-school-community relationships is concerned. 相似文献
999.
1000.
The chief purpose of this study was to identify characteristics that distinguish approach as an attachment behavior from approach serving other behavioral systems. Locomotor approaches of 16 male and 10 female white middle-class infants to an attachment figure (the mother) and to a nonattachment figure (the visitor-observer) were examined under naturalistic conditions at home. Observations were made during 4-hour home visits at 3-week intervals; those from 26 to 54 weeks were used. When approach was examined in a free-choice situation and without regard to behavioral context, infants approached the mother proportionally (though slightly) more often than the visitor (p less than .05). In 2 behavioral contexts, however, spontaneous infant approaches were sharply differential to the mother; approaches accompanied by crying and approaches terminating in a pickup appeal were directed almost exclusively to the mother (p less than .0001 for both). Touching upon completion of the approach was not differential, except in the context of a pickup appeal. Object-oriented approaches were more often directed to the visitor than to the mother (p less than .002) and may be either exploratory or affiliative. It is suggested that neither approach nor touching can be assumed to serve the attachment system without consideration of context- both environmental and behavioral. 相似文献