全文获取类型
收费全文 | 2133篇 |
免费 | 28篇 |
国内免费 | 2篇 |
专业分类
教育 | 1553篇 |
科学研究 | 142篇 |
各国文化 | 24篇 |
体育 | 178篇 |
综合类 | 4篇 |
文化理论 | 24篇 |
信息传播 | 238篇 |
出版年
2022年 | 14篇 |
2021年 | 33篇 |
2020年 | 48篇 |
2019年 | 67篇 |
2018年 | 83篇 |
2017年 | 104篇 |
2016年 | 94篇 |
2015年 | 53篇 |
2014年 | 63篇 |
2013年 | 438篇 |
2012年 | 64篇 |
2011年 | 45篇 |
2010年 | 44篇 |
2009年 | 50篇 |
2008年 | 68篇 |
2007年 | 81篇 |
2006年 | 45篇 |
2005年 | 47篇 |
2004年 | 50篇 |
2003年 | 45篇 |
2002年 | 39篇 |
2001年 | 35篇 |
2000年 | 31篇 |
1999年 | 39篇 |
1998年 | 16篇 |
1997年 | 19篇 |
1996年 | 30篇 |
1995年 | 22篇 |
1994年 | 20篇 |
1993年 | 27篇 |
1992年 | 28篇 |
1991年 | 28篇 |
1990年 | 24篇 |
1989年 | 20篇 |
1988年 | 14篇 |
1987年 | 16篇 |
1986年 | 11篇 |
1985年 | 24篇 |
1984年 | 13篇 |
1983年 | 17篇 |
1982年 | 20篇 |
1981年 | 13篇 |
1980年 | 12篇 |
1979年 | 15篇 |
1978年 | 10篇 |
1977年 | 16篇 |
1976年 | 8篇 |
1975年 | 12篇 |
1974年 | 8篇 |
1971年 | 7篇 |
排序方式: 共有2163条查询结果,搜索用时 15 毫秒
101.
102.
103.
Judith Graham 《Literacy》2000,34(2):61-67
Where authors and illustrators exercise rigorous constraint with their texts, with neither replicating the work that the other can portray more effectively, they are at their most creative and they make picture books to which readers are repeatedly drawn because of the inherent and deeply satisfying challenges offered. Moreover, the allure is not just to children; teachers find that such texts draw from them their most creative ideas for ways of working with children. Three picture books are examined in terms of their strengths and potential activities. Conclusions are drawn which seek to justify the sharing of such picture books in terms of imaginative empowerment and lasting messages about reading. 相似文献
104.
105.
Tests were conducted on three athletic shoe midsole materials and on three synthetic sports surfaces. All specimens were found to absorb energy when loaded. For a specific maximum load the amount of energy absorbed by each material was found to decrease as the load application rate increased. The materials exhibited different capacities to dissipate energy under the application of the same impulse. This may be a consideration for the injury protection afforded. The development of rheological models from the results of the tests aided an explanation of how force is resisted and energy absorbed by synthetic sports materials. Their shock absorbing properties were associated with the rheological elements of elasticity and viscosity. 相似文献
106.
Braided composite materials for the production of lightweight, high rigidity golf shafts 总被引:1,自引:1,他引:0
Braiding is not currently used in the production of golf shafts. The objective of this work was to develop, through a modelling
process consisting of altering lamina sequence, a golf shaft, using braided laminas, which would have mass, stiffness and
torque comparable to commercially available composite and steel shafts. A 2D conical braided composite model was previously
developed and validated to predict elastic constants of braided closed meshed structures. Energy methods were used to calculate
the stiffness and torque of shafts using prescribed industry approaches. Shaft mass was calculated based on geometry and density
of constitutent materials. Modelled shafts had both braided and unidirectional layers and compared favourably with or were
better than commercially available composite and steel shafts in terms of deflection force and twist angle; they had the same
weight as composite shafts but were much lighter than steel shafts. If these findings are verified, braided composites would
be a viable and effective approach to the design of future golf shafts. 相似文献
107.
108.
同学们,本期开始,"YY英语救助站"将热忱地为大家提供优质有效的服务!欢迎大家给我们"输送病号"(来信来稿)。我们将尽量解决你们在英语学习中遇到的"疑难杂症"!嘿嘿,YY两字要发字母Y的音,不要念错喽!至于为什么起这个名字,一方面,它同why(为什么)是谐音,另一方面,它们也是"语言"两字的拼音首字母。两者同时表示这是一个专门为语言学习排忧解难的场所哦! 相似文献
109.
Evaluating effectiveness of small group information literacy instruction for Undergraduate Medical Education students using a pre‐ and post‐survey study design 下载免费PDF全文
110.