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排序方式: 共有347条查询结果,搜索用时 15 毫秒
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图书馆员职业道德解读 总被引:5,自引:0,他引:5
围绕当前图书馆实践,从5个方面对《中国图书馆员职业道德准则(试行)》作初步诠释。 相似文献
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Shoudong Wang Shulin Liu Jie Wang Kengo Yokosho Bin Zhou Ya-Chi Yu Zhi Liu Wolf B Frommer Jian Feng Ma Li-Qing Chen Yuefeng Guan Huixia Shou Zhixi Tian 《国家科学评论(英文版)》2020,7(11):1776
Soybean accounts for more than half of the global production of oilseed and more than a quarter of the protein used globally for human food and animal feed. Soybean domestication involved parallel increases in seed size and oil content, and a concomitant decrease in protein content. However, science has not yet discovered whether these effects were due to selective pressure on a single gene or multiple genes. Here, re-sequencing data from >800 genotypes revealed a strong selection during soybean domestication on GmSWEET10a. The selection of GmSWEET10a conferred simultaneous increases in soybean-seed size and oil content as well as a reduction in the protein content. The result was validated using both near-isogenic lines carrying substitution of haplotype chromosomal segments and transgenic soybeans. Moreover, GmSWEET10b was found to be functionally redundant with its homologue GmSWEET10a and to be undergoing selection in current breeding, leading the the elite allele GmSWEET10b, a potential target for present-day soybean breeding. Both GmSWEET10a and GmSWEET10b were shown to transport sucrose and hexose, contributing to sugar allocation from seed coat to embryo, which consequently determines oil and protein contents and seed size in soybean. We conclude that past selection of optimal GmSWEET10a alleles drove the initial domestication of multiple soybean-seed traits and that targeted selection of the elite allele GmSWEET10b may further improve the yield and seed quality of modern soybean cultivars. 相似文献
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中小学课程的改革与评价考试体系的完善 总被引:7,自引:0,他引:7
为了保证课程改革的成功,评价考试体系的改革必须同步进行。应辩证地看待传统的考试方法,批判地继承传统考试的优点,要充分利用课程改革的有利时机,对传统的中小学评价考试观进行改革,还要引进相应的现代评价考试理论和方法,树立以激励学生发展,发展学生专长的评价考试观,使用先进的评价考试技术方法,建立与课程改革相适应的评价考试体系,从而更好地促进课程改革的顺利进行。 相似文献
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“尚史“传统对红学的影响 总被引:1,自引:0,他引:1
朴永钟 《南京晓庄学院学报》2002,18(3):79-83
把《红楼梦》当作“历史文件”来处理的史学阐释观念与方法 ,在红学研究中具有举足轻重的影响 ,是明清以来红学研究的基本倾向 ,这是理解红学争论的一把钥匙。 相似文献
6.
David D. Williams Joseph B. South Stephen C. Yanchar Brent G. Wilson Stephanie Allen 《Educational technology research and development : ETR & D》2011,59(6):885-907
This study employed a qualitative research design to investigate how instructional designers use evaluation in everyday design
practice. While past research has examined how designers spend their time, how they generally make decisions, and expert-novice
differences, little attention has been paid to use of context, input, process, or product evaluation, from the perspective
of practicing designers. Based on interviews of practitioners, our findings included ten themes regarding how designers use
evaluation to improve their products. While these results substantiate to some degree the claim that practitioners believe
clients will not pay for formal evaluations, they also suggest that practitioners use evaluation in important but less formal
ways. Other conclusions regarding the role of evaluation in design are provided and future directions for training and research
are discussed. 相似文献
7.
This study examines how parent socioeconomic status (SES) directly and indirectly predicts children's school readiness through pathways of parental investment. Data come from direct assessments with preschool children and surveys with their primary caregivers in Ghana at the start of the 2015–2016 school year (N = 2,137; Mage = 5.2 years). Results revealed SES-related gaps in all parental investment characteristics and child school readiness skills. Preschool involvement served as the primary mediating mechanism in the path from SES to most school readiness skills, though it did not predict executive function. The number of books in the household was marginally positively predictive of early literacy, whereas at-home stimulation was negatively related to motor, literacy, and numeracy skills. 相似文献
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人之悟感发展与教育的生本化改革 总被引:6,自引:0,他引:6
悟感是一种前意识现象,其主要功能在于提供产生感悟的基础和激活思想。悟感在人的精神生活中起着普遍的基础性作用,具有可求同性、能动性、对于符号世界的蕴涵性以及使认识回归本体的还原性。儿童的悟感与生俱来,又在他们的自主活动中发展,因而儿童是最重要的教育资源。教育要取得成效,就要高度尊重和全面依靠学生,即实施生本教育。 相似文献