排序方式： 共有82条查询结果，搜索用时 15 毫秒
21.
25.
26.
28.
29.
数字图书馆建设中存在的问题及解决办法 总被引：36，自引：0，他引：36
王大可 《现代图书情报技术》2000,16(4):10-13
论述我国数字图书馆建设中存在的一些主要问题, 同时就数字图书馆的系统构架、网络环境、软件模式、资源库建设、标准与格式、版权等提出了解决办法。 相似文献
30.
This study aimed to examine the relations among property strategies, working memory, and multiplication tasks with 101 Chinese fourth-grade students. Two multiplication property strategies (associative and distributive) were compared with no strategy and demonstrated differentiated effects on students’ accuracy and reaction time. Associative property strategy outperformed the distributive strategy and no strategy on the measures of accuracy and reaction time. The findings support the problem difficulty effect. The findings indicate that if a strategy does not necessarily simplify a problem, it might not help to enhance accuracy, suggesting that multiplication property strategies should be used with respect to the structural features of the problems. Among more difficult problems, visuospatial sketchpad consistently explained unique variances in problem accuracy. 相似文献