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2014年八年級(下)物理知識點預習、複習提綱(最新人教版)第七章力一、力1、力的概念:力是物體對物體的作用.2、力的組織:牛頓,簡稱牛,用N表示.力的感性認識:拿兩個雞蛋所用的力大約1N.3、力的作用效果:力可…
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