“探究二力平衡的条件”不是控制变量法

Publisher: 国家哲学社会科学学术期刊数据库

E-ISSN: 1003-6148|35|8|38-39

ISSN: 1003-6148

Source: 物理教学探讨:中学教学教研版, Vol.35, Iss.8, 2017-01, pp. : 38-39

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Abstract