全文获取类型
收费全文 | 58935篇 |
免费 | 2095篇 |
国内免费 | 21篇 |
出版年
2019年 | 600篇 |
2018年 | 831篇 |
2017年 | 813篇 |
2016年 | 934篇 |
2015年 | 694篇 |
2014年 | 812篇 |
2013年 | 5047篇 |
2012年 | 1456篇 |
2011年 | 1496篇 |
2010年 | 968篇 |
2009年 | 948篇 |
2008年 | 1417篇 |
2007年 | 1266篇 |
2006年 | 1150篇 |
2005年 | 1053篇 |
2004年 | 998篇 |
2003年 | 1013篇 |
2002年 | 1011篇 |
2001年 | 1749篇 |
2000年 | 1685篇 |
1999年 | 1247篇 |
1998年 | 598篇 |
1996年 | 671篇 |
1995年 | 631篇 |
1994年 | 633篇 |
1992年 | 1271篇 |
1991年 | 1173篇 |
1990年 | 1172篇 |
1989年 | 1092篇 |
1988年 | 1050篇 |
1987年 | 1046篇 |
1986年 | 1065篇 |
1985年 | 1083篇 |
1984年 | 959篇 |
1983年 | 828篇 |
1982年 | 626篇 |
1981年 | 680篇 |
1979年 | 949篇 |
1978年 | 708篇 |
1976年 | 619篇 |
1975年 | 872篇 |
1974年 | 924篇 |
1973年 | 988篇 |
1972年 | 912篇 |
1971年 | 848篇 |
1970年 | 766篇 |
1969年 | 766篇 |
1968年 | 951篇 |
1967年 | 875篇 |
1966年 | 829篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
51.
In this study, we explored the structure of pupils’ creativity in primary education following the Amusement Park Theory, by investigating undiscovered linkages between the domains of writing, mathematics, and drawing. More specifically, we examined: (a) whether some domains and general thematic areas are more closely related to each other than to others, (b) whether literacy and mathematical ability are specific underlying traits of creativity in writing and mathematics, respectively, and (c) whether intelligence and divergent thinking are related to creativity in all domains. The sample consisted of 331 Dutch 4th grade pupils. For each research question, a model was analyzed using structural equation modeling. We found creativity in mathematics and creativity in writing to be most similar, followed by creativity in mathematics and creativity in drawing, with creativity in writing and creativity in drawing being least similar. Additionally, we found evidence for several underlying traits (i.e., literacy ability and mathematical ability) and initial requirements of creativity (i.e., intelligence and divergent thinking), none of which were important for creativity in only one domain, and of which only intelligence was important for creativity in all domains. Herewith, our study provides insights regarding the complexity of the structure of creativity in primary education. 相似文献
52.
53.
54.
55.
56.
57.
58.
59.
An electronic apparatus using infrared beams for monitoring the movements of individual bees under dark conditions is described. The searching behavior of workers in an arena was monitored over 2-h periods. Mean ambulatory velocity for one bee over a distance of 100 mm was 45.6±1.51 mm/sec (n=45). Thigmokinesis and temporal activity patterns are illustrated. 相似文献
60.