这个词是什么意思？
Works about instruction in which learners progress at their own rate using workbooks, textbooks, or electromechanical devices that provide information in discrete steps, test learning at each step, and provide immediate feedback about achievement. (ERIC, Thesaurus of ERIC Descriptors, 1996).
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D011380 · MeSH 2026。
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