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gang gan wen ti shi si kao
Pages: 29-30
Year: Issue:  12
Journal: Required Reading for Junior Middle School Students

Abstract: <正> 学习杠杆知识,应认真阅读教材,做好实验,多观察生活实践中常用的各类杠杆.除此之外,还应从以下几个方面多加思考,以加深对所学杠杆知识的认识与理解.
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